Patent ID: 12200623

DETAILED DESCRIPTION

Some wireless communication systems may include communication devices, such as UEs and base stations, for example, eNBs, next-generation NodeBs or giga-NodeBs (either of which may be referred to as a gNB) that may support multiple radio access technologies. Examples of radio access technologies include 4G systems such as LTE systems and 5G systems which may be referred to as NR systems. A UE may support various types of applications, such as XR applications, which may have periodic or semi-periodic data traffic. The applications may be hosted by a server as described herein. The server may transmit the periodic or semi-periodic data traffic to a base station, which may forward the data traffic to the UE. The base station may forward the data traffic to the UE using multiple TBs (also referred to as a burst of TBs).

In XR applications, features from the real and virtual environments may be overlaid and displayed to a user for consumption via the UE. To avoid visual conflicts, such as misaligning objects from the real and virtual environments, and other visual conflicts, the UE may sense, generate, and send pose information to a network (e.g., a base station, a server hosting the XR application). The pose information may define a position and orientation of the UE (or user) in space relative to the real and virtual environments. The UE may send the pose information and/or other control information in accordance with a configured grant. A configured grant may allocate resources (also referred to as configured grant resources), which the UE may use for downlink reception or uplink transmission, or both. The configured grant may be activated according to one or more schemes. In some examples, the base station may activate the configured grant (e.g., a configured grant type 1) for the UE by RRC signaling. In some other examples, the base station may activate or deactivate the configured grant (e.g., a configured grant type 2) for the UE by RRC signaling and L1/L2 control signaling (e.g., MAC-CE signaling).

A configured grant may, in some cases, configure the UE with a single set of parameters to use when transmitting the pose information and/or other control information to the network. However, in some cases, channel conditions (e.g., a link quality) between the UE and the network may change and these set of parameters may no longer be appropriate to use when communicating with the network. Because the UE operates in accordance with the single set of parameters provided in the configured grant, the UE does not posses any mechanism to adapt with the changing channel conditions to improve reliability and decrease latency for XR applications. Various aspects of the present disclosure relate to configuring the UE with a configured grant including multiple set of parameters, and the UE may select a set of parameters from the configured grant based on a channel condition. Thus, the UE may adapt to changing channel conditions, which may result in improved reliability for XR applications and reduced power consumption for the UE.

In some examples, the UE may be configured to signal to the network the selected set of parameters and their corresponding parameter values. For example, the UE may be configured to signal the selected set of parameters over semi-static signaling (e.g., RRC messaging) or dynamic signaling (e.g., MAC-CE messaging, or the like). In some examples, for dynamic signaling, the UE multiplexes the message carrying the dynamic indication of the selected set of parameters with a current uplink data transmission. In some examples, the network may signal to the UE to select the set of parameters based on channel status feedback from the UE, or a measurement report from the UE, etc.

Aspects of the subject matter described in this disclosure may be implemented to realize one or more of the following potential improvements, among others. The techniques employed by the UE may provide benefits and enhancements to the operation of the UE. For example, operations performed by the UE may provide power saving improvements to the UE. In some examples, configuring the UE to select a set of parameters based on a channel condition may reduce power consumption by the UE. In some other examples, configuring the UE to select a set of parameters based on a channel condition may promote higher reliability and lower latency XR-related operations, among other benefits.

Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to adaptive configured grant for power saving.

FIG.1illustrates an example of a wireless communications system100that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The wireless communications system100may include one or more base stations105, one or more UEs115, and a core network130. In some examples, the wireless communications system100may be an LTE network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or an NR network. In some examples, the wireless communications system100may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

The base stations105may be dispersed throughout a geographic area to form the wireless communications system100and may be devices in different forms or having different capabilities. The base stations105and the UEs115may wirelessly communicate via one or more communication links125. Each base station105may provide a coverage area110over which the UEs115and the base station105may establish one or more communication links125. The coverage area110may be an example of a geographic area over which a base station105and a UE115may support the communication of signals according to one or more radio access technologies.

The UEs115may be dispersed throughout a coverage area110of the wireless communications system100, and each UE115may be stationary, or mobile, or both at different times. The UEs115may be devices in different forms or having different capabilities. Some example UEs115are illustrated inFIG.1. The UEs115described herein may be able to communicate with various types of devices, such as other UEs115, the base stations105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown inFIG.1.

The base stations105may communicate with the core network130, or with one another, or both. For example, the base stations105may interface with the core network130through one or more backhaul links120(e.g., via an S1, N2, N3, or other interface). The base stations105may communicate with one another over the backhaul links120(e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations105), or indirectly (e.g., via core network130), or both. In some examples, the backhaul links120may be or include one or more wireless links. One or more of the base stations105described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology.

A UE115may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE115may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, a UE115may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples. The UEs115described herein may be able to communicate with various types of devices, such as other UEs115that may sometimes act as relays as well as the base stations105and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown inFIG.1.

The UEs115and the base stations105may wirelessly communicate with one another via one or more communication links125over one or more carriers. The term “carrier” may refer to a set of radio frequency 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 radio frequency 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.

In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be positioned according to a channel raster for discovery by the UEs115. A carrier may be operated in a standalone mode where initial acquisition and connection may be conducted by the UEs115via the carrier, or the carrier may be operated in a non-standalone mode where a connection is anchored using a different carrier (e.g., of the same or a different radio access technology).

The communication links125shown in the wireless communications system100may include uplink transmissions from a UE115to a base station105, or downlink transmissions from a base station105to a UE115. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode). A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system100. For example, the carrier bandwidth may be one of a number of determined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communications system100(e.g., the base stations105, the UEs115, or both) may have hardware configurations that support communications over a particular carrier bandwidth or may be configurable to support communications over one of a set of carrier bandwidths. In some examples, the wireless communications system100may include base stations105or UEs115that support simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE115may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.

Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are 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). Thus, the more resource elements that a UE115receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE115. A wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE115.

One or more numerologies for a carrier may be supported, where a numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, a UE115may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time and communications for the UE115may be restricted to one or more active BWPs. The time intervals for the base stations105or the UEs115may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of Ts=1/(Δfmax·Nf) seconds, where Δfmaxmay represent the maximum supported subcarrier spacing, and Nfmay represent the maximum supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing. Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communications systems100, a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., Nf) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation. A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system100and 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 communications system100may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

Physical channels may be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs115. For example, one or more of the UEs115may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEs115and UE-specific search space sets for sending control information to a specific UE115.

Each base station105may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with a base station105(e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area110or a portion of a geographic coverage area110(e.g., a sector) over which the logical communication entity operates. Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station105. For example, a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas110, among other examples.

A macro cell covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs115with service subscriptions with the network provider supporting the macro cell. A small cell may be associated with a lower-powered base station105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells may provide unrestricted access to the UEs115with service subscriptions with the network provider or may provide restricted access to the UEs115having an association with the small cell (e.g., the UEs115in a closed subscriber group (CSG), the UEs115associated with users in a home or office). A base station105may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access for different types of devices.

A base station105may be movable and therefore provide communication coverage for a moving geographic coverage area110. In some examples, different geographic coverage areas110associated with different technologies may overlap, but the different geographic coverage areas110may be supported by the same base station105. In other examples, the overlapping geographic coverage areas110associated with different technologies may be supported by different base stations105. The wireless communications system100may include, for example, a heterogeneous network in which different types of the base stations105provide coverage for various geographic coverage areas110using the same or different radio access technologies.

The wireless communications system100may support synchronous or asynchronous operation. For synchronous operation, the base stations105may have similar frame timings, and transmissions from different base stations105may be approximately aligned in time. For asynchronous operation, the base stations105may have different frame timings, and transmissions from different base stations105may, in some examples, not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations.

Some UEs115, such as MTC or IoT devices, may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication). M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station105without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that makes use of the information or presents the information to humans interacting with the application program. Some UEs115may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.

Some UEs115may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously). In some examples, half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for the UEs115include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs115may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs)) within a carrier, within a guard-band of a carrier, or outside of a carrier.

The wireless communications system100may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system100may be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications. The UEs115may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission critical functions). Ultra-reliable communications may include private communication or group communication and may be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT), mission critical video (MCVideo), or mission critical data (MCData). Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission critical, and ultra-reliable low-latency may be used interchangeably herein.

The base station105and the UE115may support various types of applications that may have periodic or semi-periodic data traffic. The base station105may be in wireless communication with a server (not shown), which may provide the periodic or semi-periodic data traffic to the base station105to forward to the UE115. The server may be a cloud server, a server associated with an application subscription provider, proxy server, web server, application server, or any combination thereof. The server may include an application distribution platform. The application distribution platform may allow the UE115to discover, browse, share, and download applications via the base station105, and therefore provide a digital distribution of the application from the application distribution platform. As such, a digital distribution may be a form of delivering content such as data, without the use of physical media but over online delivery mediums, such as the Internet. For example, the UE115may upload or download applications for streaming, downloading, uploading, or processing, data (e.g., images, audio, video). The server may also transmit to the UE115a variety of information, such as instructions or commands to download applications on the UE115via the base station105.

By way of example, the base station105and the UE115may support XR applications, which may have periodic or semi-periodic XR data traffic. An XR application may support various frame rates, for example 60 MHz frame rates or 120 MHz frame rates. The server may generate an XR frame at 60 MHz, which may correspond to a periodicity of 16.67 ms. Alternatively, the server may generate an XR frame at 120 MHz, which may correspond to a periodicity of 8.33 ms. The server may transmit the periodic or semi-periodic XR data traffic to the base station105, which may forward the XR data traffic to the UE115. The server may divide the XR data traffic into multiple slices (also referred to as files) and encode each slice separately, and transmit the encoded slices to the base station105, which may forward the XR data traffic to the UE115using multiple TBs (also referred to as a burst of TBs).

For XR applications features from the real and virtual environments may be overlaid and displayed to a user for consumption via the UE115. To avoid visual conflicts, such as misaligning objects from the real and virtual environments, among other visual conflicts, the UE115may generate and send pose information to a network (e.g., a server hosting the XR application). The pose information may define a position and orientation of the UE115(or user) in space relative to the real and virtual environments. In some cases, different applications may have different uplink data flows.

For VR applications there may be a single uplink data flow. For example, the UE115may generate pose information (e.g., six degree of freedom (6DOF) pose information) and other control information. In some examples, the UE115may generate or transmit the pose information based on a data rate (e.g., 0.5-2 Mbps). The UE115may transmit the pose information and other control information based on an uplink transmit periodicity (e.g., 2 mn (500 Hz)). In some examples, the pose information and other control information may have different file sizes (e.g., 0.5 Mbit/500=1 Kbit=125 byte, 2 Mbit/500=4 Kbit=500 byte). An FDP may be 1.25 ms to 10 ms.

For AR applications there may be two uplink data flows. As part of the first uplink data flow, the UE115may generate pose information (e.g., 6DOF pose information) and other control information. The UE115may generate or transmit the pose information based on a data rate (e.g., 0.5-2 Mbps). The UE115may transmit the pose information and other control information based on an uplink transmit periodicity (e.g., 2 mn (500 Hz)). Similarly, for the AR applications, the FDP may be 1.25 ms to 10 ms. As part of the second uplink data flow, the UE115may generate pose information for a scene update associated with the AR applications. For scene updates, the UE115may generate or transmit the pose information based on a data rate (e.g., 10 Mbps at 10 Hz). In some examples, the pose information may have different file sizes (e.g., 1 Mbits per 100 ms=125 kbyte). An FDB may be 100 ms.

The UE115may benefit from the periodic or semi-periodic data traffic, and more specifically from the transmission delay between bursts of TBs carrying the periodic or semi-periodic data traffic to implement various operations to reduce power consumption. The UE115may send the pose information and/or other control information in accordance with a configured grant, which, in some cases, may configure the UE115with a single set of parameters to use when transmitting the pose information and/or other control information to the network. However, in some cases, channel conditions (e.g., a link quality) between the UE115and the network may change and these set of parameters may no longer be appropriate to use when communicating with the network. Because the UE115operates in accordance with the single set of parameters provided in the configured grant, the UE115does not posses any mechanism to adapt with the changing channel conditions to improve reliability and decrease latency for XR applications.

Various aspects of the present disclosure relate to configuring the UE115with a configured grant including multiple set of parameters, and the UE115may, via a UE communication manager102, select a set of parameters from configured grant based on a channel condition. Thus, the UE115may adapt, via a UE communication manager102, to changing channel conditions, which may result in improved reliability for XR applications and reduced power consumption for the UE115. In some examples, the UE115may be configured to signal, via a UE communication manager102, to the network the selected set of parameters and their corresponding parameter values. For example, the UE115may be configured to signal the selected set of parameters over semi-static signaling (e.g., RRC messaging) or dynamic signaling (e.g., MAC-CE messaging, or the like). In some examples, for dynamic signaling, the UE115multiplexes, via a UE communication manager102, the message carrying the dynamic indication of the selected set of parameters with a current uplink data transmission. In some examples, the network may signal to the UE15to select the set of parameters based on channel status feedback from the UE, or a measurement report from the UE115, etc.

A UE115may also be able to communicate directly with other UEs115over a device-to-device (D2D) communication link135(e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs115utilizing D2D communications may be within the geographic coverage area110of a base station105. Other UEs115in such a group may be outside the geographic coverage area110of a base station105or be otherwise unable to receive transmissions from a base station105. In some examples, groups of the UEs115communicating via D2D communications may utilize a one-to-many (1:M) system in which each UE115transmits to every other UE115in the group. In some examples, a base station105facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs115without the involvement of a base station105.

The D2D communication link135may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs115). In some examples, vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. A vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., base stations105) using vehicle-to-network (V2N) communications, or with both.

The core network130may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network130may be an evolved packet core (EPC) or 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs115served by the base stations105associated with the core network130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services150for one or more network operators. The IP services150may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service.

Some of the network devices, such as a base station105, may include subcomponents such as an access network entity140, which may be an example of an access node controller (ANC). Each access network entity140may communicate with the UEs115through one or more other access network transmission entities145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs). Each access network transmission entity145may include one or more antenna panels. In some configurations, various functions of each access network entity140or base station105may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station105).

The wireless communications system100may operate using one or more frequency bands, in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. The UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs115located indoors. The transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

The wireless communications system100may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band, or in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as the millimeter band. In some examples, the wireless communications system100may support millimeter wave (mmW) communications between the UEs115and the base stations105, and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate use of antenna arrays within a device. The propagation of EHF transmissions, however, may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.

The wireless communications system100may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system100may employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed radio frequency spectrum bands, devices such as the base stations105and the UEs115may employ carrier sensing for collision detection and avoidance. In some examples, operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA). Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

A base station105or a UE115may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a base station105or a UE115may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a base station105may be located in diverse geographic locations. A base station105may have an antenna array with a number of rows and columns of antenna ports that the base station105may use to support beamforming of communications with a UE115. Likewise, a UE115may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.

The base stations105or the UEs115may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

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 base station105, a UE115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation).

A base station105or a UE115may use beam sweeping techniques as part of beam forming operations. For example, a base station105may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station105multiple times in different directions. For example, the base station105may transmit a signal according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by a transmitting device, such as a base station105, or by a receiving device, such as a UE115) a beam direction for later transmission or reception by the base station105.

Some signals, such as data signals associated with a particular receiving device, may be transmitted by a base station105in a single beam direction (e.g., a direction associated with the receiving device, such as a UE115). In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in one or more beam directions. For example, a UE115may receive one or more of the signals transmitted by the base station105in different directions and may report to the base station105an indication of the signal that the UE115received with a highest signal quality or an otherwise acceptable signal quality.

In some examples, transmissions by a device (e.g., by a base station105or a UE115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from a base station105to a UE115). The UE115may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across a system bandwidth or one or more sub-bands. The base station105may transmit a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded or unprecoded. The UE115may provide feedback for beam selection, which may be a PMI or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted in one or more directions by a base station105, a UE115may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE115) or for transmitting a signal in a single direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g., a UE115) may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station105, such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned in a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

The wireless communications system100may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. A Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the RRC protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE115and a base station105or a core network130supporting radio bearers for user plane data. At the physical layer, transport channels may be mapped to physical channels.

The UEs115and the base stations105may support retransmissions of data to increase the likelihood that data is received successfully. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly over a communication link125. HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.

FIG.2illustrates an example of a wireless communications system200that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The wireless communications system200may implement or be implemented by one or more aspects of the wireless communications system100. For example, the wireless communications system200may include a base station105-aand a UE115-a, which may be examples of a base station105and a UE115as described herein. The wireless communications system200may also include a server205, which may be examples of a server as described herein. The wireless communications system200may support multiple radio access technologies including 4G systems such as LTE systems, LTE-A systems, or LTE-A Pro systems, and 5G systems, which may be referred to as NR systems. The wireless communications system200may include features for improvements to power savings and, in some examples, may promote high reliability and low latency uplink operations for power saving, among other benefits.

In the example ofFIG.2, the base station105-aand the UE115-amay support various types of applications that may have periodic or semi-periodic data traffic. The base station105-amay be in wireless communication with the server205, which may provide the periodic or semi-periodic data traffic to the base station105-ato forward to the UE115-a. The server205may be a cloud server, a server associated with an application subscription provider, proxy server, web server, application server, or any combination thereof. The server205may include an application distribution platform. The application distribution platform may allow the UE115-ato discover, browse, share, and download applications via the base station105-a, and therefore provide a digital distribution of the application from the application distribution platform. As such, a digital distribution may be a form of delivering content such as data, without the use of physical media but over online delivery mediums, such as the Internet. For example, the UE115-amay upload or download applications for streaming, downloading, uploading, or processing, data (e.g., images, audio, video). The server205may also transmit to the UE115-aa variety of information, such as instructions or commands to download applications on the UE115-avia the base station105-a.

By way of example, the base station105-aand the UE115-amay support XR applications, which may have periodic or semi-periodic XR data traffic. For XR-related applications, the UE115-amay generate and send pose information210, as well as other control information215to the server205(e.g., a server hosting the XR application) via the base station105-a. The pose information210may define a pose, a posture, a position, an orientation, or a movement of the UE115-a(or a user of the UE115-a), and may be acquired via imaging devices including head-mounted units (HMUs), head-mounted displays (HMDs), external imaging devices, or any combination thereof. The pose information210may thereby include data regarding the freedom of movement of the UE115-a(or the user), and may be characterized by six degrees of freedom in which a user/object may change position (e.g., translation upwards/downwards, translation left/right, translation forwards/backwards, pitch, yaw, roll). The control information215may refer to other inputs or commands input by a user, such as movement/commands with a joystick, controller, or other device. The UE115-amay additionally acquire scene information. The scene information may include images and/or video of a surrounding physical or virtual environment, and may be acquired in the context of XR applications along with the pose information210or the control information215, or both.

With reference toFIG.2, the UE115-amay, at220, sample the pose information210, the control information215, the scene information, or any combination thereof. The UE115may thereby acquire information, at230, which is to be transmitted to the server205and/or the base station115-a. For example, the UE115-amay sample Pose 1 at230. In some examples, the pose information210and the control information215may be acquired (e.g., sampled) at a data rate of approximately 0.5-2 Mbps, and may be transmitted to the server205approximately ever 2 ms (e.g., 500 Hz). Additionally, the pose information210, the control information215, or both, may be sampled and/or transmitted with a file size of 1 Kbit (e.g., 125 bytes), or 4 Kbit (e.g., 500 bytes). Comparatively, the scene information may be acquired (e.g., sampled) at a data rate of approximately 10 Mbps, and may be transmitted to the server205at a rate of 10 Hz. Additionally, the scene information may be sampled and/or transmitted with a file size of 1 Mbits per 100 ms (e.g., 125 Kbytes).

At225, the UE115-amay transmit the sampled information (transmit Pose 1225) to the server205. In some aspects, the UE115-amay transmit the sampled information within the first uplink symbol following the time in which the information (e.g., the pose information210, the control information215, scene information) was sampled. At230, the sampled information may be received at the server205. At235, the server205may render and encode a new XR frame based on (e.g., according to) the received information (Pose 1). In some aspects, XR frames may be generated periodically, and may be divided into multiple slices that are encoded separately. As shown inFIG.2, the age of acquired information (e.g., age of pose240) may be defined as the duration between when the information was sampled (e.g., Pose 1 sampled at220) and when the XR is rendered and/or encoded at the server205.

At245, the XR frame may be transmitted to the base station105-a. In some aspects, each encoded slide (of file) of the XR frame may be transmitted from the server205to the base station105-aseparately. At250, the base station105-amay transmit the received XR frames to the UE115-a. In some aspects, the slices of the XR frame may be transmitted through multiple TBs, or a burst of TBs, to the UE115-a. For example, as will be discussed in further detail herein with respect toFIG.3, the base station105-amay transmit data to the UE115-avia XR frame bursts255(e.g., first XR frame burst255-a, second XR frame burst255-b, and third XR frame burst255-c). Each XR frame burst255may have a transmission delay requirement, and the downlink transmission from the base station105-ato the UE115-amay be characterized by a downlink delay budget260. At265, the UE115-amay decode the data received from the base station105-a(e.g., decode XR frame bursts255) and perform asynchronous time warp procedures. Subsequently, at270, the received XR frames may be displayed at the UE115-a. The example ofFIG.2may depict a delay (e.g., a motion-to-render-to-photon delay275) from motion to rendering to photon.

The transmission of the pose information210and/or other control information by the UE115-a, in some cases, may occur at periodicity different from a periodicity of the XR frame bursts255, and result in wasted power consumption. For example, the UE115-amay transmit the pose information210to the server205and/or the base station105-aaccording to a configured grant, which may define a set of parameters (e.g., MCS, TBS, etc.) for the UE115-ato use for the transmission of the pose information210and other control information to the server205and/or the base station105-a. In some cases, however, channel conditions may vary between the UE115-aand the server205and/or the base station105-a. This retransmission may thus add unwanted latency for the XR application. The UE115-amay retransmit the pose information210and other control information multiple times because the UE115-ais configured to use the same set of parameters and channel conditions may not have improved where the set of parameters are sufficient for the retransmission.

In the wireless communication system200, the UE115-amay be configured with a configured grant carrying multiple set of parameters. The UE115-amay thereby be configured to select a set of parameters based on a channel condition to experience power saving improvements. In other words, the UE115-amay adapt to changing channel conditions, which may result in improved reliability for XR applications and reduced power consumption for the UE115. In some examples, the UE115may dynamically indicate the selected set of parameters for a semi-persistent uplink data transmission (also referred to as a configured grant transmission). In some other examples, the UE115may directly indicate parameter values of the selected set of parameters. For example, the UE115may transmit an indication, to the base station105or the server205, or both, an MCS index value, a TBS index value, an antenna port, a PMI index value, a number of layers, etc.

The UE115may transmit the dynamic indication (e.g., an uplink control information (UCI)) via an uplink control channel, such as a PUCCH. The PUCCH resource may be pre-allocated and associated with a configured grant resource. The PUCCH resource may have a same or different periodicity with the associated configured grant resource. Alternatively, the UE115may transmit the dynamic indication via a MAC-CE message (also referred to as MAC-CE) through the current configured grant transmission and applied from the next configured grant transmission. To transmit through the current configured grant transmission, the MAC-CE may be multiplexed with current uplink data. In some other examples, the UE115may transmit the dynamic indication via an RRC message to indicate its preferred parameters sets or values.

The server205(e.g., XR server) may adaptively change its transmission rate (e.g., frames per second, frame quality/resolution) depending on a channel condition or buffer status, or both. If the base station105determines that an average channel condition for the UE115degrades, then the base station105may provide feedback to the server205to reduce its transmission rate. The base station105can use downlink buffer status, a channel status feedback from the UE115, or measurement report from the UE115, or the like, to identify whether a channel to the UE115degrades. If the UE's115XR application receive rate (e.g., frames per second, frame quality/resolution) falls below a certain threshold, then the UE115can provide feedback to the server205or the base station105, or both, to adjust its transmission rate.

The base station105may adjust its grant configuration to adapt to the adjusted rate change in application layer. The base station105may thereby transmit, to the UE115, a DCI message (in a downlink control channel (e.g., a PDCCH)) or a MAC-CE message to update or reactivate with parameters in the configured grant configuration. The UE115may update a periodicity, a repetition factor value, or a number of slots allocated in a configured grant, or any combination thereof, based on the received message from the base station105. The UE115may transmit, and the base station105may receive, a MAC-CE indicating one or both of an activation or a deactivation of one or more configured grants or a group of configured grants. The MAC-CE may include a sequence of bits, where each bit corresponds to either a configured grant or a group of configured grants configured via RRC signaling. The UE115may transmit the MAC-CE to the base station105to indicate which configured grant is to be activated or not, or to which group of configured grants to switch to. As such, the UE115may dynamically transmit, to the base station105, a MAC-CE to update or reactivate one or more parameters associated with a configured grant configuration. For example, the one or more parameters may include one or more offsets for one or more configured grants, a periodicity, a repetition factor value (e.g., repK), a number of slots allocated in a configured grant periodicity, an indication for an activation and/or a deactivation of one or more configured grants or a group of configured grants.

For power saving, downlink reception and uplink transmission can be synchronized, so that the UE115may receive downlink frame and send uplink pose information simultaneously or proximate in time. In some examples, if a number of frames generated per second is changed from the server205(encoder) for adaption, then the base station105can also change its physical layer parameter to adapt its resource to match with the reduced frame rates. This adaptation could reduce waste of radio resource and reduce power consumption. The following downlink and uplink resource and/or parameters at the base station105may be related to XR frame generation rate: a discontinuous reception cycle, a grant periodicity, a semi-persistent scheduling periodicity, a scheduling request periodicity, or a combination thereof. Using downlink signaling, the base station105may jointly indicate downlink and uplink resource and/or parameters to adapt to newly adjusted frame generation rate in application layer. The set of parameter lists/values are pre-configured, and the base station105may indicate which one to apply dynamically.

FIG.3illustrates an example of a downlink and uplink configuration300that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The downlink and uplink configuration300may implement or may be implemented by aspects of the wireless communications systems100and200as described with reference toFIGS.1and2. respectively. The downlink and uplink configuration300may be based on a configuration by a base station105, and implemented by a UE115. The downlink and uplink configuration300may configure time resources (e.g., symbols, minislots, slots) as well as frequency resources (e.g., carriers, subcarriers). The downlink and uplink configuration300may support multiple radio access technologies including 4G systems such as LTE systems, LTE-A systems, or LTE-A Pro systems, and 5G systems which may be referred to as NR systems.

The base station105may transmit, and the UE115may receive, one or more frame bursts305carrying one or more frames associated with an application. For example, the base station105may transmit, and the UE115may receive, one or more XR frame bursts carrying one or more XR frames associated with an XR application. A frame may be divided into multiple slices that may be separately encoded. The base station105may transmit the encoded slices over the air through multiple TBs (a burst of TBs). In some examples, the base station105may transmit the frame bursts305according to a periodicity310(e.g., a frame generation periodicity), which may be based on a frame rate of an application, such as an XR application (e.g., a 60 Hz or 120 Hz frame rate, which provide a frame generation periodicity of 16.67 ms or 8.33 ms, respectively). The UE115may thereby receive the frame bursts305based on the periodicity310. In the example ofFIG.3, there may be one or more power saving opportunities315between the frame bursts305for the UE115to experience added power savings.

The UE115may determine one or more power saving opportunities315between the frame bursts305based at least in part on the periodicity310. For example, the UE115may determine a power saving opportunity315-abetween two consecutive frame bursts (e.g., the frame burst305-aand the frame burst305-b). Additionally or alternatively, the UE115may determine a power saving opportunity315-bbetween two other consecutive frame bursts (e.g., the frame burst305-band the frame burst305-c). In some cases, however, the UE115may be unable to experience added power savings associated with the one or more power saving opportunities315because a configured grant periodicity may be different than a downlink traffic periodicity (e.g., frame bursts305). In some other cases, the UE115may be unable to experience added power savings associated with the one or more power saving opportunities315because of uplink retransmission (e.g., retransmission of pose information and/or control information) due to changes in channel conditions, which results in wasted power consumption. The one or more power saving opportunities315between the frame bursts305thus are unused. To benefit from the power saving opportunities315, the UE115may be configured with a configured grant that includes multiple set of parameters, and the UE115may select a set of parameters from the configured grant based on a channel condition. Thus, the UE115may adapt to changing channel conditions, which may result in improved reliability for XR applications and reduced power consumption for the UE115.

FIG.4Aillustrates an example of a transmission configuration400-athat supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The transmission configuration400-amay implement aspects of the wireless communications system100and200described with reference toFIGS.1and2, respectively. For example, the transmission configuration400-amay be based on a configuration by a base station105and implemented by a UE115. In the example ofFIG.4A, the base station105may transmit, and the UE115may receive, a grant configuration. For example, the base station105may transmit, and the UE115may receive, a grant configuration via an RRC procedure. The base station105may thereby transmit, and the UE115may receive, an RRC message carrying the grant configuration. The configured grant may include a single set of parameters (e.g., an MCS, a TBS, and the like) for the UE115to use for downlink reception and uplink transmissions.

In the example ofFIG.4A, once the configured grant is activated by the base station105(e.g., via a DCI message) or the UE115, or both, the configured grant does not change until it is deactivated or reactivated. This static configured grant may result in added power consumption and other unnecessary resource usage for the base station105or the UE115, or both. For example, in some cases, the base station105or the UE115, or both, may determine a change in channel conditions (e.g., a link quality) between the base station105and the UE115, which may negatively impact downlink reception405-aand uplink transmission410-a(e.g., semi-static uplink transmissions) for the UE115. As a result, the UE115may have to retransmit an uplink transmission to the base station105. For example, the UE115may retransmit uplink control or data using the same single set of parameters. Thus, the uplink transmission410-ais extended due to retransmission. In some cases, retransmission may not be effective for the base station105or the UE115, or both. For example, in XR applications, retransmissions may be unfavorable and may negatively impact user experience because, in XR applications, uplink transmissions (e.g., carrying pose information and/or control information) has to occur with relatively low latency in order to reduce power consumption (e.g., decrease power level415-a).

FIG.4Billustrates an example of a transmission configuration400-bthat supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The transmission configuration400-bmay be based on a configuration by a base station105and implemented by a UE115to promote power saving for the UE115by selecting a set of parameters based on a channel condition between the base station105and the UE115. The transmission configuration400-bmay also be based on a configuration by the base station105and implemented by the UE115to promote high reliability and low latency semi-persistent uplink operations, among other benefits. In the example ofFIG.4B, the base station105may transmit, and the UE115may receive, a grant configuration. For example, the base station105may transmit, and the UE115may receive, a grant configuration via an RRC procedure. The base station105may thereby transmit, and the UE115may receive, an RRC message carrying the grant configuration. The configured grant may include multiple set of parameters (e.g., an MCS, a TBS, and the like) for the UE115to use for downlink reception and uplink transmissions.

Similarly toFIG.4A, the base station105or the UE115, or both, may determine a change in a link quality between the base station105and the UE115, which may negatively impact downlink reception405-band uplink transmission410-b(e.g., semi-static uplink transmissions) for the UE115. As a result, the UE115may have to retransmit the uplink transmission410-bto the base station105. In the example ofFIG.4B, however, the UE115may select a different set of parameters from the configured grant to adapt to the change in link quality between the base station105and the UE115. For instance, the different set of parameters may have a different MCS value, TBS value, etc. The UE115may thereby use the selected set of parameters for the retransmission of the uplink transmission410-bto improve reliability of the retransmission, which may result in a lower latency retransmission and reduced power consumption415-bfor the UE115.

FIG.5illustrates an example of a timeline500that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The timeline500may implement or be implemented by one or more aspects of the wireless communications system100and200described with reference toFIGS.1and2, respectively. The timeline500may be based on a configuration by a base station105and implemented by a UE115to promote power saving for the UE115by selecting a set of parameters based on a channel condition between the base station105and the UE115. The timeline500may also be based on a configuration by the base station105and implemented by the UE115to promote high reliability and low latency semi-persistent uplink operations, among other benefits.

With reference to the timeline500, a channel condition505between the base station105and the UE115may vary over a period510. For example, the channel condition505may correspond to a first channel quality level at a first time instance515-a, a second channel quality level at a second time instance515-a, and a third channel quality level at a third time instance515-a. Because the channel condition505between the base station105and the UE115varies over the period510, it may be beneficial for the UE115to adapt to the changing channel condition505to maintain high reliability and low latency uplink operations. By way of example, the UE115may select a first set of parameters for an uplink transmission520-aduring a first time instance515-a. The first set of parameters may include one or more parameters each having a particular value when the channel condition505corresponds to, for example a certain channel link quality, a path loss, or the like. For example, the first set of parameters may have a repetition factor value of one, an MCS index value of 14, and a TBS index value of 200 (i.e., first set or parameters={repK=1, MCS=14, TBS=200}. Additionally, or alternatively, the UE115may use one or more other parameters as described herein.

The UE115may select a second set of parameters for an uplink transmission520-bor an uplink transmission520-c, or both, during the second time instance515-bor the third time instance515-c, or both. The second set of parameters may include one or more parameters each having a particular value when the channel condition505corresponds to a different channel link quality, a path loss, or the like. For example, the second set of parameters may have a repetition factor value of two, an MCS index value of 10, and a TBS index value of 100 (i.e., second set or parameters={repK=2, MCS=10, TBS=100}. Additionally, or alternatively, the UE115may use one or more other parameters as described herein. The UE115may, in some examples, use the same set of parameters for the uplink transmission520-band the uplink transmission520-cbecause the channel condition505may be the same during the second time instance515-band the third time instance515-c. Alternatively, the UE115may use the same set of parameters for the uplink transmission520-band the uplink transmission520-cbecause the channel condition505may be within a threshold (e.g., a degradational level threshold) between the second time instance515-band the third time instance515-c.

The UE115may transmit, to the base station105, one or more of the uplink transmissions520, and the base station105may blindly detect the uplink transmissions520. The base station105may blindly detect the uplink transmissions520based on possible parameters configurations. That is, the base station105may blindly detect the uplink transmissions520based on the multiple set of parameters the base station105configured the UE115to use for the uplink transmissions520in view of the changing channel condition505. Therefore, the UE115may be configured with a configured grant that includes multiple set of parameters, and the UE115may dynamically select a set of parameters from the configured grant based on the channel condition505. Thus, the UE115may adapt to changing channel condition505, which may result in reduced power consumption for the UE115.

FIG.6illustrates an example of a process flow600that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The process flow600may implement or be implemented by one or more aspects of the wireless communications system100and the wireless communications system200described with reference toFIGS.1and2, respectively. The process flow600may be based on a configuration by a base station105-band implemented by a UE115-bto promote power saving for the UE115-bby selecting a set of parameters based on a channel condition between the base station105-band the UE115-b. The process flow600may also be based on a configuration by the base station105-band implemented by the UE115-bto promote high reliability and low latency semi-persistent uplink operations (e.g., transmission of position information and control information of the UE115-bfor an XR application), among other benefits. In the following description of the process flow600, the operations between the base station105-band the UE115-bmay be transmitted in a different order than the example order shown, or the operations performed by the base station105-band the UE115-bmay be performed in different orders or at different times. Some operations may also be omitted from the process flow600, and other operations may be added to the process flow600. The base station105-band the UE115-bmay be examples of a base station105and a UE115as described with reference toFIGS.1and2, respectively.

At605, the base station105-bmay determine a grant configuration for the UE115-b. The grant configuration may include multiple set of parameters. Each set of parameters may include one or more parameters for semi-persistent uplink data. The one or more parameters may include downlink parameters and uplink parameters associated with the semi-persistent uplink data, for example, for an XR application. For example, the base station105-bmay transmit, via downlink signaling (e.g., RRC, MAC-CE, DCI), jointly downlink parameters and uplink parameters associated with the semi-persistent uplink data to adapt a frame generation rate in an application layer associated with the UE115-b. Using downlink signaling, the base station105-bmay jointly indicate downlink and uplink resource and/or parameters to adapt to newly adjusted frame generation rate in application layer. The set of parameter lists/values are pre-configured, and the base station105-bmay indicate which one to apply dynamically.

In some examples, each set of parameters may include different values for the one or more parameters, for example, based on a channel condition. That is, the base station105-bmay assign a set of parameters to include one or more parameters each having a particular value when a channel condition corresponds to a certain channel condition (e.g., a channel link quality, a path loss, or the like). For example, the base station105-bmay assign a repetition factor value, an MCS index value, a TBS index value, a number of layers, a number of antenna ports, a PMI index value, or any combination thereof, based on a particular channel condition. Additionally or alternatively, the downlink parameters or the uplink parameters, or both, include a discontinuous reception cycle, a grant periodicity, a semi-persistent scheduling periodicity, a scheduling request periodicity, or a combination thereof. At610, the base station105-bmay transmit, to the UE115-b, the configured grant including the multiple set of parameters via signaling. In some examples, the signaling may include a MAC-CE message, an RRC message, or a DCI message, or a combination thereof.

At615, the UE115-bmay select a set of parameters from multiple set of parameters, for example, received in the configured grant from the base station105-b. For example, the UE115-bmay receive a set of parameters based on a channel condition between the base station105-band the UE115-b. In some examples, the UE115-bmay determine the channel condition based on a channel link quality measurement, a path loss measurement, a channel state information measurement, etc. Based on the channel condition determination, the UE115-bselect a set from the multiple sets that may be appropriate for the channel condition. For example, the UE115-bmay select a set of parameters including one or more parameters (e.g., a repetition factor, a MCS index, a TBS index, a PMI index, etc.) each having a particular value (e.g., a repetition factor value, a MCS index value, a TBS index value, a precoding matrix index value, etc.) appropriate for the channel condition. The UE115-bmay thereby dynamically select a set of parameters from the multiple set of parameters related to link adaptation for a configured grant transmission (e.g., a semi-persistent uplink data transmission).

At620, the UE115-bmay optionally transmit, to the base station105-b, an indication of the selected set of parameters. In some examples, the UE115-bmay transmit, in a MAC-CE message, the indication of the one or more parameters associated with the selected set of parameters. In some examples, the UE115-bmay multiplex the MAC-CE message with another uplink transmission to the base station105-b. In some other examples, the UE115-bmay transmit, in an RRC message, the indication of the one or more parameters associated with the selected set of parameters. The indication may identify one or more parameter values of the one or more parameters associated with the selected set of parameters for the configured grant transmission (e.g., a semi-persistent uplink data transmission). For example, the UE115-bmay transmit the indication of the one or more parameters associated with the selected set of parameters on an uplink channel (e.g., PUCCH) using one or more uplink resources. The one or more uplink resources may include one or more preconfigured PUCCH resources associated with one or more grant resources associated with the configured grant. The one or more PUCCH resources and the one or more grant resources may have a same periodicity. Alternatively, the one or more PUCCH resources and the one or more grant resources may have a different periodicity. At625, the UE115-bmay determine semi-persistent uplink data to transmit to the base station105-b. For example, as described herein, the UE115-bmay generate pose information or control information, or both, for an XR application. At630, the UE115-bmay transmit the semi-persistent uplink data (e.g., configured grant transmission), to the base station105-b, using the selected set of parameters.

FIG.7shows a block diagram700of a device705that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The device705may be an example of aspects of a UE115as described herein. The device705may include a receiver710, a UE communications manager715, and a transmitter720. The device705may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver710may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to adaptive configured grant for power saving, etc.). Information may be passed on to other components of the device705. The receiver710may be an example of aspects of the transceiver1020described with reference toFIG.10. The receiver710may utilize a single antenna or a set of antennas.

The UE communications manager715may be implemented as an integrated circuit or chipset for the device705, and the receiver710and the transmitter720may be implemented as analog components (for example, amplifiers, filters, antennas) coupled with the device705modem to enable wireless transmission and reception. The actions performed by the UE communications manager715as described herein may be implemented to realize one or more potential advantages. The UE communications manager715may be an example of aspects of the UE communications manager1010described herein. By including or configuring the UE communications manager715in accordance with examples as described herein, the device705(e.g., a processor controlling or otherwise coupled to the receiver710, the transmitter720, the UE communications manager715, or a combination thereof) may support configured grant that includes multiple set of parameters, and the UE communications manager715may select a set of parameters from the configured grant based on a channel condition (e.g., a channel link quality measurement, a path loss measurement, a channel state information measurement).

For example, the UE communications manager715may receive a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The UE communications manager715may select a set of parameters from the multiple set of parameters based on a channel condition, and transmit, to a base station, the semi-persistent uplink data using the selected set of parameters. Based on adapting the configured grant, one or more processors of the device705(for example, processor(s) controlling or incorporated with the UE communications manager715) may promote improvements to power consumption, and, in some examples, may promote enhanced efficiency for high reliability and low latency wireless communications operations, among other benefits.

The UE communications manager715, or its sub-components, may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the UE communications manager715, or its sub-components may be executed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

The UE communications manager715, or its sub-components, may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components. In some examples, the UE communications manager715, or its sub-components, may be a separate and distinct component in accordance with various aspects of the present disclosure. In some examples, the UE communications manager715, or its sub-components, may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.

The transmitter720may transmit signals generated by other components of the device705. In some examples, the transmitter720may be collocated with a receiver710in a transceiver component. For example, the transmitter720may be an example of aspects of the transceiver1020described with reference toFIG.10. The transmitter720may utilize a single antenna or a set of antennas.

FIG.8shows a block diagram800of a device805that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The device805may be an example of aspects of a device705, or a UE115as described herein. The device805may include a receiver810, a UE communications manager815, and a transmitter835. The device805may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver810may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to adaptive configured grant for power saving, etc.). Information may be passed on to other components of the device805. The receiver810may be an example of aspects of the transceiver1020described with reference toFIG.10. The receiver810may utilize a single antenna or a set of antennas.

The UE communications manager815may be an example of aspects of the UE communications manager715as described herein. The UE communications manager815may include a grant component820, a parameter component825, and a data component830. The UE communications manager815may be an example of aspects of the UE communications manager1010described herein. The grant component820may receive a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The parameter component825may select a set of parameters from the multiple set of parameters based on a channel condition. The data component830may transmit, to a base station, the semi-persistent uplink data using the selected set of parameters.

The transmitter835may transmit signals generated by other components of the device805. In some examples, the transmitter835may be collocated with a receiver810in a transceiver component. For example, the transmitter835may be an example of aspects of the transceiver1020described with reference toFIG.10. The transmitter835may utilize a single antenna or a set of antennas.

FIG.9shows a block diagram900of a UE communications manager905that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The UE communications manager905may be an example of aspects of a UE communications manager715, a UE communications manager815, or a UE communications manager1010described herein. The UE communications manager905may include a grant component910, a parameter component915, a data component920, an indicator component925, a multiplexer component930, and a report component935. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The grant component910may receive a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The parameter component915may select a set of parameters from the multiple set of parameters based on a channel condition. In some cases, the one or more parameters include a repetition factor value, an MCS index value, a TBS index value, a number of layers, a number of antenna ports, a PMI value, or a combination thereof. The parameter component915may receive, from the base station via a downlink channel, a message including downlink parameters and uplink parameters associated with the semi-persistent uplink data for an XR application, where selecting the set of parameters associated with the grant configuration is based on the received downlink and uplink parameters. In some cases, the downlink parameters or the uplink parameters, or both, include a discontinuous reception cycle, a grant periodicity, a semi-persistent scheduling periodicity, a scheduling request periodicity, or a combination thereof.

The data component920may transmit, to a base station, the semi-persistent uplink data using the selected set of parameters. The indicator component925may transmit an indication of the one or more parameters associated with the selected set of parameters. In some examples, the indicator component925may transmit the indication of the one or more parameters associated with the selected set of parameters on an uplink channel using one or more uplink resources. In some examples, the indicator component925may transmit, in a MAC-CE message, the indication of the one or more parameters associated with the selected set of parameters via the semi-persistent uplink data. In some examples, the indicator component925may apply the one or more parameters associated with the selected set of parameters for a subsequent semi-persistent uplink data based on transmitting, in the MAC-CE message, the indication of the one or more parameters associated with the selected set of parameters via the semi-persistent uplink data.

The indicator component925may transmit, in an RRC message, the indication of the one or more parameters associated with the selected set of parameters. In some cases, the indication identifies one or more parameter values of the one or more parameters associated with the selected set of parameters for the semi-persistent uplink data. In some cases, the indication identifies the selected set of parameters for the semi-persistent uplink data. In some cases, the uplink channel includes a PUCCH. In some cases, the one or more uplink resources include one or more preconfigured PUCCH resources associated with one or more grant resources associated with the grant. In some cases, the one or more uplink resources and the one or more grant resources include a same periodicity. In some cases, the one or more uplink resources and the one or more grant resources include a different periodicity. The multiplexer component930may multiplex the MAC-CE message with another uplink transmission, where transmitting, in the MAC-CE message, the indication of the one or more parameters associated with the selected set of parameters via the semi-persistent uplink data is based on multiplexing the MAC-CE message with the other uplink transmission.

The report component935may transmit, to the base station, a report identifying a channel degradation level based on the channel condition. In some examples, the report component935may receive, from the base station via a downlink channel, a message to select the set of parameters associated with the grant configuration based on the transmitted report, the set of parameters including a periodicity, one or more offsets for one or more configured grants, a repetition factor value, or a number of slots allocated in a configured grant, or any combination thereof. The report component935may include a MAC-CE indicating one or both of an activation or a deactivation of a group of configured grants, where the MAC-CE includes a sequence of bits, where each bit corresponds to either a configured grant or a group of configured grants configured via RRC signaling. The UE may send the MAC-CE to a base station to indicate which configured grant is to be activated or not, or to which group of configured grants to switch to. In some cases, the message includes a MAC-CE message, an RRC message, or a DCI message, or a combination thereof. In some cases, the downlink channel includes a PDCCH.

FIG.10shows a diagram of a system1000including a device1005that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The device1005may be an example of or include the components of device705, device805, or a UE115as described herein. The device1005may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a UE communications manager1010, an I/O controller1015, a transceiver1020, an antenna1025, memory1030, and a processor1040. These components may be in electronic communication via one or more buses (e.g., bus1045).

At least one implementation may enable the UE communications manager1010to support configured grant that includes multiple set of parameters, and the UE communications manager1010may select a set of parameters from the configured grant based on a channel condition (e.g., a channel link quality measurement, a path loss measurement, a channel state information measurement). For example, the UE communications manager1010may receive a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The UE communications manager1010may select a set of parameters from the multiple set of parameters based on a channel condition, and transmit, to a base station, the semi-persistent uplink data using the selected set of parameters. Based on adapting the configured grant, one or more processors of the device1005(for example, processor(s) controlling or incorporated with the UE communications manager1010) may promote improvements to power consumption, and, in some examples, may promote enhanced efficiency for high reliability and low latency wireless communications operations, among other benefits.

The I/O controller1015may manage input and output signals for the device1005. The I/O controller1015may also manage peripherals not integrated into the device1005. In some cases, the I/O controller1015may represent a physical connection or port to an external peripheral. In some cases, the I/O controller1015may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. In other cases, the I/O controller1015may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller1015may be implemented as part of a processor. In some cases, a user may interact with the device1005via the I/O controller1015or via hardware components controlled by the I/O controller1015.

The transceiver1020may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver1020may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver1020may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas. In some cases, the device1005may include a single antenna1025. However, in some cases, the device1005may have more than one antenna1025, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

The memory1030may include RAM and ROM. The memory1030may store computer-readable, computer-executable code1035including instructions that, when executed, cause the processor1040to perform various functions described herein. In some cases, the memory1030may contain, among other things, a basic input/output system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices. The code1035may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code1035may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code1035may not be directly executable by the processor1040but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

The processor1040may 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 processor1040may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into the processor1040. The processor1040may be configured to execute computer-readable instructions stored in a memory (e.g., the memory1030) to cause the device1005to perform various functions (e.g., functions or tasks supporting adaptive configured grant for power saving).

FIG.11shows a block diagram1100of a device1105that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The device1105may be an example of aspects of a base station105as described herein. The device1105may include a receiver1110, a base station communications manager1115, and a transmitter1120. The device1105may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver1110may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to adaptive configured grant for power saving, etc.). Information may be passed on to other components of the device1105. The receiver1110may be an example of aspects of the transceiver1420described with reference toFIG.14. The receiver1110may utilize a single antenna or a set of antennas.

The base station communications manager1115may transmit, to a UE, a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data and receive the semi-persistent uplink data from the UE, the semi-persistent uplink data associated with a set of parameters selected from the multiple set of parameters by the UE or the device1105. The base station communications manager1115may be an example of aspects of the base station communications manager1410described herein.

The base station communications manager1115, or its sub-components, may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the base station communications manager1115, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC), a FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

The base station communications manager1115, or its sub-components, may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components. In some examples, the base station communications manager1115, or its sub-components, may be a separate and distinct component in accordance with various aspects of the present disclosure. In some examples, the base station communications manager1115, or its sub-components, may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.

The transmitter1120may transmit signals generated by other components of the device1105. In some examples, the transmitter1120may be collocated with a receiver1110in a transceiver component. For example, the transmitter1120may be an example of aspects of the transceiver1420described with reference toFIG.14. The transmitter1120may utilize a single antenna or a set of antennas.

FIG.12shows a block diagram1200of a device1205that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The device1205may be an example of aspects of a device1105, or a base station105as described herein. The device1205may include a receiver1210, a base station communications manager1215, and a transmitter1230. The device1205may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver1210may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to adaptive configured grant for power saving, etc.). Information may be passed on to other components of the device1205. The receiver1210may be an example of aspects of the transceiver1420described with reference toFIG.14. The receiver1210may utilize a single antenna or a set of antennas.

The base station communications manager1215may be an example of aspects of the base station communications manager1115as described herein. The base station communications manager1215may include a grant component1220and a data component1225. The base station communications manager1215may be an example of aspects of the base station communications manager1410described herein. The grant component1220may transmit, to a UE, a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The data component1225may receive the semi-persistent uplink data from the UE, the semi-persistent uplink data associated with a set of parameters selected from the multiple set of parameters by the UE or the device1205.

The transmitter1230may transmit signals generated by other components of the device1205. In some examples, the transmitter1230may be collocated with a receiver1210in a transceiver component. For example, the transmitter1230may be an example of aspects of the transceiver1420described with reference toFIG.14. The transmitter1230may utilize a single antenna or a set of antennas.

FIG.13shows a block diagram1300of a base station communications manager1305that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The base station communications manager1305may be an example of aspects of a base station communications manager1115, a base station communications manager1215, or a base station communications manager1410described herein. The base station communications manager1305may include a grant component1310, a data component1315, an indicator component1320, a report component1325, and a parameter component1330. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The grant component1310may transmit, to a UE, a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The data component1315may receive the semi-persistent uplink data from the UE, the semi-persistent uplink data associated with a set of parameters selected from the multiple set of parameters by the UE or the base station. The indicator component1320may receive an indication of the one or more parameters associated with the selected set of parameters. In some examples, the indicator component1320may receive, in a MAC-CE message, the indication of the one or more parameters associated with the selected set of parameters via the semi-persistent uplink data. In some examples, the indicator component1320may receive, in an RRC message, the indication of the one or more parameters associated with the selected set of parameters. In some cases, the indication identifies one or more parameter values of the one or more parameters associated with the selected set of parameters for the semi-persistent uplink data. In some cases, the indication identifies the selected set of parameters for the semi-persistent uplink data. The one or more parameters include a repetition factor value, an MCS index value, a TBS index value, a number of layers, a number of antenna ports, a PMI value, or a combination thereof.

The report component1325may receive, from the UE, a report identifying a channel degradation level based on the channel condition. The parameter component1330may transmit, to the UE via a downlink channel, a message to select the set of parameters associated with the grant configuration based on the received report, the set of parameters including a periodicity, one or more offsets for one or more configured grants, a repetition factor value, or a number of slots allocated in a configured grant periodicity, or any combination thereof. In some examples, the parameter component1330may transmit, to the UE via a downlink channel, a message including downlink parameters and uplink parameters associated with the semi-persistent uplink data for an XR application, where selecting the set of parameters associated with the grant configuration is based on the received downlink and uplink parameters. In some cases, the message includes a MAC-CE message, an RRC message, or a DCI message, or a combination thereof. In some cases, the downlink channel includes a PDCCH. In some cases, the downlink parameters or the uplink parameters, or both, include a discontinuous reception cycle, a grant periodicity, a semi-persistent scheduling periodicity, a scheduling request periodicity, or a combination thereof.

FIG.14shows a diagram of a system1400including a device1405that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The device1405may be an example of or include the components of device1105, device1205, or a base station105as described herein. The device1405may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a base station communications manager1410, a network communications manager1415, a transceiver1420, an antenna1425, memory1430, a processor1440, and an inter-station communications manager1445. These components may be in electronic communication via one or more buses (e.g., bus1450).

The base station communications manager1410may transmit, to a UE, a grant configuration including multiple set of parameters. Each set of parameters may include one or more parameters for semi-persistent uplink data. The base station communications manager1410may receive the semi-persistent uplink data from the UE. The semi-persistent uplink data may be associated with a set of parameters selected from the multiple set of parameters by the UE or the device1405.

The network communications manager1415may manage communications with the core network (e.g., via one or more wired backhaul links). For example, the network communications manager1415may manage the transfer of data communications for client devices, such as one or more UEs115.

The transceiver1420may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver1420may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver1420may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas. In some cases, the device1405may include a single antenna1425. However, in some cases, the device1405may have more than one antenna1425, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

The memory1430may include RAM, ROM, or a combination thereof. The memory1430may store computer-readable code1435including instructions that, when executed by a processor (e.g., the processor1440) cause the device to perform various functions described herein. In some cases, the memory1430may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices. The code1435may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code1435may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code1435may not be directly executable by the processor1440but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

The processor1440may 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 processor1440may be configured to operate a memory array using a memory controller. In some cases, a memory controller may be integrated into processor1440. The processor1440may be configured to execute computer-readable instructions stored in a memory (e.g., the memory1430) to cause the device1405to perform various functions (e.g., functions or tasks supporting adaptive configured grant for power saving).

The inter-station communications manager1445may manage communications with other base station105, and may include a controller or scheduler for controlling communications with UEs115in cooperation with other base stations105. For example, the inter-station communications manager1445may coordinate scheduling for transmissions to UEs115for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager1445may provide an X2 interface within an LTE/LTE-A wireless communication network technology to provide communication between base stations105.

FIG.15shows a flowchart illustrating a method1500that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The operations of method1500may be implemented by a UE or its components as described herein. For example, the operations of method1500may be performed by a UE communications manager as described with reference toFIGS.7through10. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At1505, the UE may receive a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The operations of1505may be performed according to the methods described herein. In some examples, aspects of the operations of1505may be performed by a grant component as described with reference toFIGS.7through10.

At1510, the UE may select a set of parameters from the multiple set of parameters based on a channel condition. The operations of1510may be performed according to the methods described herein. In some examples, aspects of the operations of1510may be performed by a parameter component as described with reference toFIGS.7through10.

At1515, the UE may transmit, to a base station, the semi-persistent uplink data using the selected set of parameters. The operations of1515may be performed according to the methods described herein. In some examples, aspects of the operations of1515may be performed by a data component as described with reference toFIGS.7through10.

FIG.16shows a flowchart illustrating a method1600that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The operations of method1600may be implemented by a UE or its components as described herein. For example, the operations of method1600may be performed by a UE communications manager as described with reference toFIGS.7through10. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At1605, the UE may receive a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The operations of1605may be performed according to the methods described herein. In some examples, aspects of the operations of1605may be performed by a grant component as described with reference toFIGS.7through10.

At1610, the UE may select a set of parameters from the multiple set of parameters based on a channel condition. The operations of1610may be performed according to the methods described herein. In some examples, aspects of the operations of1610may be performed by a parameter component as described with reference toFIGS.7through10.

At1615, the UE may transmit an indication of the one or more parameters associated with the selected set of parameters. The operations of1615may be performed according to the methods described herein. In some examples, aspects of the operations of1615may be performed by an indicator component as described with reference toFIGS.7through10.

At1620, the UE may transmit, to a base station, the semi-persistent uplink data using the selected set of parameters. The operations of1620may be performed according to the methods described herein. In some examples, aspects of the operations of1620may be performed by a data component as described with reference toFIGS.7through10.

FIG.17shows a flowchart illustrating a method1700that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The operations of method1700may be implemented by a UE or its components as described herein. For example, the operations of method1700may be performed by a UE communications manager as described with reference toFIGS.7through10. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At1705, the UE may receive a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The operations of1705may be performed according to the methods described herein. In some examples, aspects of the operations of1705may be performed by a grant component as described with reference toFIGS.7through10.

At1710, the UE may transmit, to the base station, a report identifying a channel degradation level based on a channel condition. The operations of1710may be performed according to the methods described herein. In some examples, aspects of the operations of1710may be performed by a report component as described with reference toFIGS.7through10.

At1715, the UE may receive, from a base station via a downlink channel, a message to select the set of parameters associated with the grant configuration based on the transmitted report, the set of parameters including a periodicity or a repetition factor value, or both. The operations of1715may be performed according to the methods described herein. In some examples, aspects of the operations of1715may be performed by a report component as described with reference toFIGS.7through10.

At1720, the UE may select the set of parameters from the multiple set of parameters based on the message. The operations of1720may be performed according to the methods described herein. In some examples, aspects of the operations of1720may be performed by a parameter component as described with reference toFIGS.7through10.

At1725, the UE may transmit, to the base station, the semi-persistent uplink data using the selected set of parameters. The operations of1725may be performed according to the methods described herein. In some examples, aspects of the operations of1725may be performed by a data component as described with reference toFIGS.7through10.

FIG.18shows a flowchart illustrating a method1800that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The operations of method1800may be implemented by a base station or its components as described herein. For example, the operations of method1800may be performed by a base station communications manager as described with reference toFIGS.11through14. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.

At1805, the base station may transmit, to a UE, a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The operations of1805may be performed according to the methods described herein. In some examples, aspects of the operations of1805may be performed by a grant component as described with reference toFIGS.11through14.

At1810, the base station may receive the semi-persistent uplink data from the UE, the semi-persistent uplink data associated with a set of parameters selected from the multiple set of parameters by the UE or the base station. The operations of1810may be performed according to the methods described herein. In some examples, aspects of the operations of1810may be performed by a data component as described with reference toFIGS.11through14.

FIG.19shows a flowchart illustrating a method1900that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The operations of method1900may be implemented by a base station or its components as described herein. For example, the operations of method1900may be performed by a base station communications manager as described with reference toFIGS.11through14. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.

At1905, the base station may transmit, to a UE, a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The operations of1905may be performed according to the methods described herein. In some examples, aspects of the operations of1905may be performed by a grant component as described with reference toFIGS.11through14.

At1910, the base station may receive an indication of the one or more parameters associated with the selected set of parameters. The operations of1910may be performed according to the methods described herein. In some examples, aspects of the operations of1910may be performed by an indicator component as described with reference toFIGS.11through14.

At1915, the base station may receive the semi-persistent uplink data from the UE, the semi-persistent uplink data associated with a set of parameters selected from the multiple set of parameters by the UE or the base station. The operations of1915may be performed according to the methods described herein. In some examples, aspects of the operations of1915may be performed by a data component as described with reference toFIGS.11through14.

FIG.20shows a flowchart illustrating a method2000that supports adaptive configured grant for power saving in accordance with aspects of the present disclosure. The operations of method2000may be implemented by a base station or its components as described herein. For example, the operations of method2000may be performed by a base station communications manager as described with reference toFIGS.11through14. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.

At2005, the base station may transmit, to a UE, a grant configuration including multiple set of parameters, each set of parameters including one or more parameters for semi-persistent uplink data. The operations of2005may be performed according to the methods described herein. In some examples, aspects of the operations of2005may be performed by a grant component as described with reference toFIGS.11through14.

At2010, the base station may receive, from the UE, a report identifying a channel degradation level based on a channel condition. The operations of2010may be performed according to the methods described herein. In some examples, aspects of the operations of2010may be performed by a report component as described with reference toFIGS.11through14.

At2015, the base station may transmit, to the UE via a downlink channel, a message to select the set of parameters associated with the grant configuration based on the received report, the set of parameters including a periodicity or a repetition factor value, or both. The operations of2015may be performed according to the methods described herein. In some examples, aspects of the operations of2015may be performed by a parameter component as described with reference toFIGS.11through14.

At2020, the base station may receive the semi-persistent uplink data from the UE, the semi-persistent uplink data associated with a set of parameters selected from the multiple set of parameters by the UE or the base station. The operations of2020may be performed according to the methods described herein. In some examples, aspects of the operations of2020may be performed by a data component as described with reference toFIGS.11through14.

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

The following provides an overview of aspects of the present disclosure:

Aspect 1: A method for wireless communication at a UE, comprising: receiving a grant configuration comprising multiple set of parameters, each set of parameters comprising one or more parameters for semi-persistent uplink data; selecting a set of parameters from the multiple set of parameters based at least in part on a channel condition; and transmitting, to a base station, the semi-persistent uplink data using the selected set of parameters.

Aspect 2: The method of aspect 1, further comprising: transmitting an indication of the one or more parameters associated with the selected set of parameters.

Aspect 3: The method of aspect 2, wherein the indication identifies one or more parameter values of the one or more parameters associated with the selected set of parameters for the semi-persistent uplink data.

Aspect 4: The method of any of aspects 2 through 3, wherein the indication identifies the selected set of parameters for the semi-persistent uplink data.

Aspect 5: The method of any of aspects 2 through 4, wherein the one or more parameters comprise a repetition factor value, an MCS index value, a TBS index value, a number of layers, a number of antenna ports, a PMI value, or a combination thereof.

Aspect 6: The method of any of aspects 2 through 5, wherein transmitting the indication comprises: transmitting the indication of the one or more parameters associated with the selected set of parameters on an uplink channel using one or more uplink resources.

Aspect 7: The method of aspect 6, wherein the uplink channel comprises a PUCCH.

Aspect 8: The method of any of aspects 6 through 7, wherein the one or more uplink resources comprise one or more preconfigured PUCCH resources associated with one or more grant resources associated with the grant.

Aspect 9: The method of aspect 8, wherein the one or more uplink resources and the one or more grant resources comprise a same periodicity.

Aspect 10: The method of any of aspects 8 through 9, wherein the one or more uplink resources and the one or more grant resources comprise a different periodicity.

Aspect 11: The method of any of aspects 2 through 10, wherein transmitting the indication comprises: transmitting, in a MAC-CE message, the indication of the one or more parameters associated with the selected set of parameters via the semi-persistent uplink data; and applying the one or more parameters associated with the selected set of parameters for a subsequent semi-persistent uplink data based at least in part on transmitting, in the MAC-CE message, the indication of the one or more parameters associated with the selected set of parameters via the semi-persistent uplink data.

Aspect 12: The method of aspect 11, further comprising: multiplexing the MAC-CE message with another uplink transmission, wherein transmitting, in the MAC-CE message, the indication of the one or more parameters associated with the selected set of parameters via the semi-persistent uplink data is based at least in part on multiplexing the MAC-CE message with the other uplink transmission.

Aspect 13: The method of any of aspects 2 through 12, wherein transmitting the indication comprises: transmitting, in an RRC message, the indication of the one or more parameters associated with the selected set of parameters.

Aspect 14: The method of any of aspects 1 through 13, further comprising: transmitting, to the base station, a report identifying a channel degradation level based at least in part on the channel condition; and receiving, from the base station via a downlink channel, a message to select the set of parameters associated with the grant configuration based at least in part on the transmitted report, the set of parameters comprising a periodicity or a repetition factor value, or both.

Aspect 15: The method of aspect 14, wherein the message comprises a MAC-CE message, an RRC message, or a DCI message, or a combination thereof.

Aspect 16: The method of any of aspects 14 through 15, wherein the downlink channel comprises a PDCCH.

Aspect 17: The method of any of aspects 1 through 16, further comprising: receiving, from the base station via a downlink channel, a message comprising downlink parameters and uplink parameters associated with the semi-persistent uplink data for an XR application, wherein selecting the set of parameters associated with the grant configuration is based at least in part on the received downlink and uplink parameters.

Aspect 18: The method of aspect 17, wherein the downlink parameters or the uplink parameters, or both, comprise a discontinuous reception cycle, a grant periodicity, a semi-persistent scheduling periodicity, a scheduling request periodicity, or a combination thereof.

Aspect 19: A method for wireless communication at a base station, comprising: transmitting, to a UE, a grant configuration comprising multiple set of parameters, each set of parameters comprising one or more parameters for semi-persistent uplink data; and receiving the semi-persistent uplink data from the UE, the semi-persistent uplink data associated with a set of parameters selected from the multiple set of parameters by the UE or the base station.

Aspect 20: The method of aspect 19, further comprising: receiving an indication of the one or more parameters associated with the selected set of parameters.

Aspect 21: The method of aspect 20, wherein the indication identifies one or more parameter values of the one or more parameters associated with the selected set of parameters for the semi-persistent uplink data.

Aspect 22: The method of any of aspects 20 through 21, wherein the indication identifies the selected set of parameters for the semi-persistent uplink data.

Aspect 23: The method of any of aspects 20 through 22, wherein the one or more parameters comprise a repetition factor value, an MCS index value, a TBS index value, a number of layers, a number of antenna ports, a PMI value, or a combination thereof.

Aspect 24: The method of any of aspects 20 through 23, wherein receiving the indication comprises: receiving, in a MAC-CE message, the indication of the one or more parameters associated with the selected set of parameters via the semi-persistent uplink data.

Aspect 25: The method of any of aspects 20 through 24, wherein receiving the indication comprises: receiving, in an RRC message, the indication of the one or more parameters associated with the selected set of parameters.

Aspect 26: The method of any of aspects 19 through 25, further comprising: receiving, from the UE, a report identifying a channel degradation level based at least in part on a channel condition; and transmitting, to the UE via a downlink channel, a message to select the set of parameters associated with the grant configuration based at least in part on the received report, the set of parameters comprising a periodicity or a repetition factor value, or both.

Aspect 27: The method of aspect 26, wherein the message comprises a MAC-CE message, an RRC message, or a DCI message, or a combination thereof.

Aspect 28: The method of any of aspects 26 through 27, wherein the downlink channel comprises a PDCCH.

Aspect 29: The method of any of aspects 19 through 28, further comprising: transmitting, to the UE via a downlink channel, a message comprising downlink parameters and uplink parameters associated with the semi-persistent uplink data for an XR application, wherein selecting the set of parameters associated with the grant configuration is based at least in part on the received downlink and uplink parameters.

Aspect 30: The method of aspect 29, wherein the downlink parameters or the uplink parameters, or both, comprise a discontinuous reception cycle, a grant periodicity, a semi-persistent scheduling periodicity, a scheduling request periodicity, or a combination thereof.

Aspect 31: An apparatus for wireless communication, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 1 through 18.

Aspect 32: An apparatus for wireless communication, comprising at least one means for performing a method of any of aspects 1 through 18.

Aspect 33: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 18.

Aspect 34: An apparatus for wireless communication, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 19 through 30.

Aspect 35: An apparatus for wireless communication, comprising at least one means for performing a method of any of aspects 19 through 30.

Aspect 36: A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform a method of any of aspects 19 through 30.

Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.

Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include random-access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of”) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.”

In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.

The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein, but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.