Techniques for allocating reception resources

Abstract

Methods, systems, and apparatus for wireless communications are described. A user equipment (UE) may send a UE capability message to a base station associated with a number of downlink multiple-input multiple-output (MIMO) layers supported at the UE. The UE may receive a configuration for a downlink MIMO layer set, the configuration comprising at least a first downlink MIMO layer subset configured for a first cell and a second downlink MIMO layer subset configured for a second cell. The UE may allocate a first set of resources to the first cell or the second cell, or both, based on the first and second downlink MIMO layer subsets. The UE may determine that a second set of resources is not allocated to the downlink MIMO layer set, and allocate a second set of resources to the first cell or the second cell, or both.

Description

[0001] Cross-references

[0002] This patent application claims the benefit of Indian Provisional Patent Application No. 202041040990, filed by LEE et al. on September 22, 2020, entitled “TECHNIQUES TO ALLOCATE RECEIVE RESOURCES,” which is assigned to the assignee of this application and is expressly incorporated herein. Technical Field

[0003] The following relates to wireless communications, including techniques for allocating receive resources. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, etc. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (e.g., long term evolution (LTE) systems, improved LTE (LTE-A) systems, or LTE-A Pro systems) and fifth generation (5G) systems (which may be referred to as new radio (NR) systems). These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each base station or network access node simultaneously supporting communication for multiple communication devices (which may also be referred to as user equipment (UE)).

[0005] A UE may communicate using multiple-input multiple-output (MIMO) communications. The UE may be capable of supporting multiple layers of MIMO communications at once. Techniques for efficiently utilizing UE resources for MIMO communications may be improved. Summary of the Invention

[0006] The described technology relates to improved methods, systems, devices and apparatus for supporting technologies for allocating receive resources. In summary, the described technology increases data throughput by allocating unused resources. Wireless communication systems may support multiple-input multiple-output (MIMO) communications, in which devices communicate using multiple transmit antennas and multiple receive antennas to increase data throughput. User equipment (UE) may support multiple MIMO processing chains, which are referred to as resources or receive resources, based on UE capabilities. A base station may configure the UE with the number of MIMO layers supported by the UE. The UE may allocate receive resources to a cell with a configured downlink MIMO layer to process signaling for the downlink MIMO layer. In some cases, the UE may be configured with fewer downlink MIMO layers than the UE can support, so that the UE may have unused receive resources after allocating receive resources to a cell. The UE described herein may implement technology for allocating unused resources to one or more cells configured with downlink MIMO layers to increase data rates.

[0007] A method for wireless communication at a UE is described. The method may include: sending a UE capability message associated with the number of downlink MIMO layers supported at the UE to a base station; receiving a configuration for a set of downlink MIMO layers from the base station based on the UE capability message, the configuration including at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell; allocating a first set of resources to the first cell or the second cell or both based on the first subset and the second subset of the number of downlink MIMO layers; determining that a second set of resources is not allocated to the set of downlink MIMO layers; and allocating the second set of resources to the first cell or the second cell or any combination thereof based on the determination that the second set of resources is not allocated.

[0008] A device for wireless communication at a UE is described. The device may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the device to perform the following operations: sending a UE capability message associated with the number of downlink MIMO layers supported at the UE to a base station; receiving a configuration for a downlink MIMO layer set based on the UE capability message from the base station, the configuration including at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell; allocating a first set of resources to the first cell or the second cell or both based on the first subset and the second subset of the number of downlink MIMO layers; determining that a second set of resources is not allocated to the downlink MIMO layer set; and allocating the second set of resources to the first cell or the second cell or any combination thereof based on the determination that the second set of resources is not allocated.

[0009] Another apparatus for wireless communication at a UE is described. The apparatus may include: a unit for sending a UE capability message associated with the number of downlink MIMO layers supported at the UE to a base station; a unit for receiving, from the base station, a configuration for a set of downlink MIMO layers based on the UE capability message, the configuration including at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell; a unit for allocating a first set of resources to the first cell or the second cell or both based on the first subset and the second subset of the number of downlink MIMO layers; a unit for determining that a second set of resources is not allocated to the set of downlink MIMO layers; and a unit for allocating the second set of resources to the first cell or the second cell or any combination thereof based on the determination that the second set of resources is not allocated.

[0010] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: send a UE capability message associated with the number of downlink MIMO layers supported at the UE to a base station; receive from the base station a configuration for a set of downlink MIMO layers based on the UE capability message, the configuration including at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell; allocate a first set of resources to the first cell or the second cell or both based on the first subset and the second subset of the number of downlink MIMO layers; determine that a second set of resources is not allocated to the set of downlink MIMO layers; and allocate the second set of resources to the first cell or the second cell or any combination thereof based on the determination that the second set of resources is not allocated.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, allocating the second set of resources may include operations, features, units, or instructions for performing the following operations: allocating the second set of resources based on: the corresponding frequency bandwidths used for the first cell and the second cell, the corresponding downlink bandwidth ratios used for the first cell and the second cell, or the corresponding numbers of resources allocated to the first cell and the second cell, or any combination thereof.

[0012] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for determining a first downlink bandwidth ratio for the first cell and a second downlink bandwidth ratio for the second cell, wherein the second set of resources may be allocated based on the first downlink bandwidth ratio and the second downlink bandwidth ratio.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first downlink bandwidth ratio and the second downlink bandwidth ratio may be based on whether the first cell and the second cell may be configured for frequency division duplexing or time division duplexing.

[0014] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first downlink bandwidth ratio may be determined based on a frame configuration for the first cell, where the first cell may be configured for time division duplexing.

[0015] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, means, or instructions for receiving an indication of the frame configuration for the first cell from the base station.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first downlink bandwidth ratio may be determined based on a special subframe configuration for the first cell.

[0017] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the second downlink bandwidth ratio may be determined based on a number of downlink symbols per downlink slot and a number of downlink slots per uplink-downlink cycle for the second cell, wherein the second cell may be configured for time division duplexing.

[0018] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for receiving, from the base station, an indication of the number of downlink symbols for each downlink time slot for the second cell and the number of downlink time slots for each uplink-downlink cycle.

[0019] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for determining a first gain for the first cell and a second gain for the second cell; and allocating the second set of resources based on a higher gain of the first gain or the second gain.

[0020] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first gain may be based on a first downlink bandwidth of the first cell and a ratio of the first downlink bandwidth of the first cell, and the second gain may be based on a second downlink bandwidth of the second cell and a ratio of the second downlink bandwidth of the second cell.

[0021] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for determining a first reference signal measurement for the first cell and a second reference signal measurement for the second cell, wherein allocating the second set of resources may be based on the first reference signal measurement and the second reference signal measurement.

[0022] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first reference signal measurement and the second reference signal measurement can be based on respective reference signal received power measurements, reference signal received quality measurements, or both.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first cell may be a new radio cell of a dual connectivity configuration, and the second cell may be a long term evolution cell of the dual connectivity configuration.

[0024] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following operations: determining a first efficiency value based on allocating the second set of resources to the first cell; determining a second efficiency value based on allocating the second set of resources to the second cell; and comparing the first efficiency value with the second efficiency value, wherein the second set of resources may be allocated based on the comparison.

[0025] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for applying a monotonically increasing function to the first efficiency value and the second efficiency value, wherein the comparison may be based on applying the monotonically increasing function.

[0026] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for receiving a request from the base station to send a UE capability message associated with the number of downlink MIMO layers supported at the UE, wherein the UE capability message may be sent based on receiving the request.

[0027] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, means, or instructions for determining a maximum number of resources, wherein the maximum number of resources corresponds to the first set of resources and the second set of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1

[0014] An example of a system for wireless communications that supports techniques for allocating receive resources in accordance with aspects of the present disclosure is shown.

[0029] Figure 2

[0014] An example of a wireless communication system supporting techniques for allocating receive resources in accordance with aspects of the present disclosure is shown.

[0030] Figure 3Examples of resource allocation schemes supporting techniques for allocating receive resources in accordance with aspects of the present disclosure are shown.

[0031] Figure 4 An example of an enhanced resource allocation scheme supporting techniques for allocating receive resources in accordance with aspects of the present disclosure is shown.

[0032] Figure 5 An example of a process flow supporting techniques for allocating receive resources in accordance with aspects of the present disclosure is shown.

[0033] Figure 6 and 7 A block diagram of a device supporting techniques for allocating receive resources in accordance with aspects of the present disclosure is shown.

[0034] Figure 8 A block diagram of a communications manager supporting techniques for allocating receive resources in accordance with aspects of the present disclosure is shown.

[0035] Figure 9 A diagram is shown of a system including devices supporting techniques for allocating receive resources in accordance with aspects of the present disclosure.

[0036] Figures 10 to 12 A flow chart illustrating a method supporting techniques for allocating receive resources in accordance with aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0037] Some wireless communication systems support multiple-input multiple-output (MIMO) communication, in which devices communicate using multiple transmit antennas and multiple receive antennas to increase data throughput. Each independent data stream between a transmitter and a receiver may be referred to as a layer. A user equipment (UE) may support up to a number of MIMO processing chains, which are referred to as resources or receive resources, based on UE capabilities. A base station may configure the UE to have a number of MIMO layers in different radio access technologies (RATs), cells, or component carriers based on the maximum number of MIMO layers supported by the UE. The UE may allocate receive resources to a cell with a configured downlink MIMO layer to process the signaling of the downlink MIMO layer. In some cases, the UE may be configured with fewer downlink MIMO layers than the UE can support, so that the UE may have unused receive resources after allocating receive resources to the cell. Unused receive resources may be inefficient for the UE, thereby reducing the possible data throughput.

[0038] The UE described herein can implement a technology for allocating unused resources to one or more cells configured with a downlink MIMO layer to increase data rate. After the UE allocates resources to one or more serving cells for the downlink MIMO layer, the UE can determine whether there are any remaining or remaining receive resources that have not yet been allocated. The UE can then assign the remaining receive resources to one of the serving cells to increase data throughput. In some cases, the UE can identify which serving cell or cells can provide the highest throughput (if unused receive resources are assigned). For example, the UE can determine to allocate receive resources based on the bandwidth of the frequency carrier of the serving cell, the effective downlink bandwidth ratio of the serving cell, the number of receive resources that have been allocated to the serving cell, or any combination thereof. The UE can utilize a function to determine the scores for different serving cells, and the UE can allocate the remaining receive resources to the serving cell with the highest score.

[0039] Aspects of the present disclosure are first described in the context of wireless communication systems. Aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flow diagrams relating to techniques for allocating receive resources.

[0040] Figure 1 An example of a wireless communication system 100 supporting techniques for allocating receive resources according to aspects of the present disclosure is shown. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, or communication with low-cost and low-complexity devices, or any combination thereof.

[0041] Base stations 105 may be dispersed throughout a geographic area to form wireless communication system 100 and may be devices of varying forms or capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which UEs 115 and base stations 105 may establish one or more communication links 125. Coverage areas 110 may be examples of geographic areas over which base stations 105 and UEs 115 may support transmission of signals according to one or more radio access technologies.

[0042] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary, mobile, or both at different times. The UEs 115 may be devices of different forms or with different capabilities. Figure 1 1. Some example UEs 115 are shown in FIG. 1. The UEs 115 described herein are capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relays, integrated access and backhaul (IAB) nodes, or other network devices), such as Figure 1 shown.

[0043] The base stations 105 can communicate with the core network 130, or with each other, or both. For example, the base stations 105 can interface with the core network 130 over one or more backhaul links 132 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 can communicate with each other directly (e.g., directly between base stations 105) or indirectly (e.g., via the core network 130) over backhaul links 120 (e.g., via X2, Xn, or other interfaces), or both. In some examples, the backhaul links 120 can be or include one or more wireless links.

[0044] One or more of the base stations 105 described herein may include or may be referred to by those skilled in the art as a base station transceiver, a radio base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a Home Node B, a Home evolved Node B, or some other appropriate terminology.

[0045] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other appropriate terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, among other examples. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, among other examples, which may be implemented in various items such as appliances, vehicles, meters, and other examples.

[0046] The UE 115 described herein is capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network devices, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, such as Figure 1 shown.

[0047] The UE 115 and the base station 105 can communicate wirelessly with each other via one or more communication links 125 on one or more carriers. The term "carrier" can refer to a collection of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier used for the communication link 125 can include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel can carry acquisition signaling (e.g., synchronization signals, system information), control signaling to coordinate operation for the carrier, user data, or other signaling. The wireless communication system 100 can support communication with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 can be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation can be used with both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers.

[0048] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates operations with respect to other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be placed according to a channel grid for discovery by a UE 115. A carrier may operate in a standalone mode, where the UE 115 performs initial acquisition and connection via the carrier, or a carrier may operate in a non-standalone mode, where a different carrier (e.g., of the same or different radio access technology) is used to anchor the connection.

[0049] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry both downlink and uplink communications (e.g., in TDD mode).

[0050] A carrier may be associated with a particular bandwidth of radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a plurality of determined bandwidths of a carrier for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). A device of the wireless communication system 100 (e.g., a base station 105, a UE 115, or both) may have a hardware configuration that supports communication on a particular carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or a UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0051] The signal waveform transmitted on the carrier may be composed of multiple subcarriers (e.g., using multicarrier 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 be composed of one symbol period (e.g., the 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). Therefore, the more resource elements received by the UE 115 and the higher the order of the modulation scheme, the higher the data rate for the UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity used for communication with the UE 115.

[0052] One or more numerologies for a carrier may be supported, where the numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications for the UE 115 may be limited to the one or more active BWPs.

[0053] The basic time unit (which may be referred to as T s =1 / (Δf max ·N f ) seconds sampling period, where Δf maxIt can represent the maximum supported subcarrier spacing, and N f The time intervals for base station 105 or UE 115 may be expressed as multiples of a maximum supported discrete Fourier transform (DFT) size. The time intervals of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0054] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, the frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into multiple time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include multiple symbol periods (e.g., depending on the length of the cyclic prefix added in front of each symbol period). In some wireless communication systems 100, the time slots may be further divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0055] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in the form of bursts of shortened TTIs (sTTIs)).

[0056] Physical channels may be multiplexed on a carrier according to various techniques. For example, physical control channels and physical data channels may be multiplexed on a downlink carrier using one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by multiple symbol periods and may extend across the system bandwidth of a carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a group of UEs 115. For example, one or more of UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates at one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0057] Each base station 105 can provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots or other types of cells, or any combination thereof). The term "cell" can refer to a logical communication entity used to communicate with the base station 105 (e.g., on a carrier) and can be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other identifier) ​​used to distinguish between adjacent cells. In some examples, a cell can also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) on which the logical communication entity operates. Depending on various factors (such as the capabilities of the base station 105), the scope of such a cell can range from a smaller area (e.g., a structure, a subset of a structure) to a larger area. For example, a cell can be or include a building, a subset of a building, or an external space between or overlapping the geographic coverage area 110, as well as other examples.

[0058] A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs 115 that have a service subscription with a network provider that supports the macro cell. Small cells may be associated with lower-power base stations 105 than macro cells, and may operate in the same or different frequency bands (e.g., licensed, unlicensed) as the macro cells. Small cells may provide unrestricted access to UEs 115 that have a service subscription with a network provider, or may provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a closed subscriber group (CSG), UEs 115 associated with users in a home or office). A base station 105 may support one or more cells and may also support communication over one or more cells using one or more component carriers.

[0059] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

[0060] In some examples, base station 105 can be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but the different geographic coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communication system 100 can include, for example, a heterogeneous network in which different types of base stations 105 use the same or different radio access technologies to provide coverage for various geographic coverage areas 110.

[0061] The wireless communication system 100 can support synchronous or asynchronous operation. For synchronous operation, the base stations 105 can have similar frame timing, and transmissions from different base stations 105 can be approximately aligned in time. For asynchronous operation, the base stations 105 can have different frame timing, and in some examples, transmissions from different base stations 105 may not be aligned in time. The techniques described herein can be used for either synchronous or asynchronous operation.

[0062] Some UEs 115 (e.g., MTC or IoT devices) may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that incorporate sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents it to a human interacting with the application. Some UEs 115 may be designed to collect information or implement automated behavior of machines or other equipment. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, climate and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based service billing.

[0063] Some UEs 115 may be configured to employ a mode of operation that reduces power consumption, such as half-duplex communication (e.g., a mode that supports one-way communication via transmission or reception rather than simultaneous transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power conservation techniques for UE 115 include entering a power-saving deep sleep mode when not engaged in active communications, when operating over a limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a guard band of a carrier, or outside of a carrier.

[0064] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE 115 can be designed to support ultra-reliable, low-latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication and can 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 can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably in this article.

[0065] In some examples, UE 115 can also communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication can be within the geographic coverage area 110 of the base station 105. Other UEs 115 in such a group can be outside the geographic coverage area 110 of the base station 105 or otherwise unable to receive transmissions from the base station 105. In some examples, groups of UEs 115 communicating via D2D communication can utilize a one-to-many (1:M) system, in which each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for the D2D communication. In other cases, the D2D communication is performed between the UEs 115 without involving the base station 105.

[0066] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination thereof. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, the vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units) or communicate with the network via one or more network nodes (e.g., base station 105) using vehicle-to-network (V2N) communication, or both.

[0067] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) that manages access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) that routes packets to or interconnects with an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets may be transmitted via the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to an IP service 150 for one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0068] Some of the network devices (e.g., base stations 105) may include subcomponents such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with the UE 115 through one or more other access network transport entities 145 (which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs)). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., base station 105).

[0069] The wireless communication system 100 can operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves can be blocked or redirected by buildings and environmental features, but the waves can penetrate structures sufficiently for macro cells to provide service to UEs 115 located indoors. Transmissions using UHF waves can be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers) compared to transmissions using the lower frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0070] The wireless communication system 100 may also operate in the super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz (also referred to as centimeter bands) or in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also referred to as millimeter bands). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be even smaller and more closely spaced than the UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may suffer from even greater atmospheric attenuation and shorter distances than SHF or UHF transmissions. The technology disclosed herein may be employed across transmissions using one or more different frequency regions, and the designated use of frequency bands across these frequency regions may differ depending on the country or regulatory agency.

[0071] The wireless communication system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can 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 an unlicensed radio frequency spectrum band, devices (such as base stations 105 and UEs 115) can employ carrier sensing for conflict detection and avoidance. In some examples, operations in the unlicensed band can be based on a carrier aggregation configuration in combination with component carriers operating in a licensed band (e.g., LAA). Operations in the unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

[0072] The base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, MIMO communication, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels (which may support MIMO operations or transmit or receive beamforming). For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having multiple rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0073] The base station 105 or UE 115 can use MIMO communication to take advantage of multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such a technique may be referred to as spatial multiplexing. For example, a transmitting device may send multiple signals via different antennas or different combinations of antennas. Similarly, a receiving device may receive multiple signals 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 for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) (where multiple spatial layers are sent to the same receiving device) and multi-user MIMO (MU-MIMO) (where multiple spatial layers are sent to multiple devices).

[0074] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to form or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array so that some signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals transmitted via antenna elements can include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with the device. Adjustments associated with each of the antenna elements can be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0075] As part of the beamforming operation, the base station 105 or the UE 115 can use beam scanning techniques. For example, the base station 105 can use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. The base station 105 can transmit some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) multiple times in different directions. For example, the base station 105 can transmit signals according to different sets of beamforming weights associated with different transmission directions. The transmissions in different beam directions can be used (e.g., by a transmitting device (such as the base station 105) or by a receiving device (such as the UE 115)) to identify the beam direction for subsequent transmission or reception by the base station 105.

[0076] Base station 105 may transmit some signals (e.g., data signals associated with a particular receiving device (e.g., UE 115)) in a single beam direction (e.g., a direction associated with the receiving device). In some examples, the beam direction associated with transmissions along the single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE 115 may receive one or more of the signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signal received by UE 115 having the highest signal quality or otherwise acceptable signal quality.

[0077] In some examples, transmissions by a device (e.g., by a base station 105 or a UE 115) 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 the base station 105 to the UE 115). The UE 115 may report feedback indicating precoding weights used for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. The base station 105 may send reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)) that may be precoded or not precoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals sent by base station 105 in one or more directions, UE 115 may employ similar techniques to send signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to send signals in a single direction (e.g., to send data to a receiving device).

[0078] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from the base station 105, a receiving device (e.g., UE 115) can try multiple reception configurations (e.g., directional listening). For example, the receiving device can try multiple reception directions by receiving via different antenna subarrays, by processing the received signals according to different antenna subarrays, by receiving according to different sets of receive beamforming weights applied to the signals received at multiple antenna elements of the antenna array (e.g., different sets of directional listening weights), or by processing the received signals according to different sets of receive beamforming weights applied to the signals received at multiple antenna elements of the antenna array (any of the above various operations can be referred to as "listening" according to different reception configurations or reception directions). In some examples, the receiving device can use a single reception configuration to receive along a single beam direction (e.g., when receiving data signals). A single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

[0079] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, the communication at the bearer or packet data convergence protocol (PDCP) layer can be IP-based. The radio link control (RLC) layer can perform packet segmentation and reassembly for transmission on the logical channel. The medium access control (MAC) layer can perform priority handling and multiplexing of logical channels to transport channels. The MAC layer can also use error detection technology, error correction technology, or both to support retransmission at the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer can provide the establishment, configuration, and maintenance of the RRC connection (which supports radio bearers for user plane data) between the UE 115 and the base station 105 or the core network 130. At the physical layer, the transport channel can be mapped to the physical channel.

[0080] UE 115 and base station 105 can support retransmission of data to increase the likelihood that the data is successfully received. Hybrid automatic repeat request (HARQ) feedback is a technique for increasing the likelihood that data is correctly received on communication link 125. HARQ can 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 can improve throughput at the MAC layer under poor radio conditions (e.g., low signal to noise conditions). In some examples, a device can support same-slot HARQ feedback, wherein the device can provide HARQ feedback in a particular time slot for data received in previous symbols in that time slot. In other cases, the device can provide HARQ feedback in subsequent time slots or according to some other time interval.

[0081] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and more. These systems can be multiple-access systems capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). A wireless network (e.g., a wireless local area network (WLAN), such as a Wi-Fi (i.e., Institute of Electrical and Electronics Engineers (IEEE) 802.11) network) can include an access point (AP) that can communicate with one or more wireless or mobile devices. An AP can be coupled to a network, such as the Internet, and can enable mobile devices to communicate via the network (or with other devices coupled to the access point). Wireless devices can communicate bidirectionally with network devices. For example, in a WLAN, a device can communicate with an associated AP via a downlink (e.g., a communication link from the AP to the device) and an uplink (e.g., a communication link from the device to the AP). A wireless personal area network (PAN), which can include a Bluetooth connection, can provide short-range wireless connections between two or more paired wireless devices. For example, a wireless device, such as a cellular phone, can utilize wireless PAN communication to exchange information, such as audio signals, with a wireless headset.

[0082] The wireless communication system 100 may support MIMO communications. The UE 115 may support multiple MIMO processing chains, which may be referred to as resources or receive resources, based on the UE capabilities. The base station 105 may configure the UE 115 with the number of MIMO layers supported by the UE 115. The UE 115 may allocate receive resources to a cell with configured downlink MIMO layers to process signaling for the downlink MIMO layers. In some cases, the UE 115 may be configured with fewer downlink MIMO layers than the UE 115 is capable of supporting, such that the UE 115 may have unused receive resources after allocating receive resources to the cells. The UE 115 described herein may implement techniques for allocating unused resources to one or more cells configured with downlink MIMO layers to increase data rates.

[0083] Figure 2 An example of a wireless communication system 200 that supports techniques for allocating reception resources according to aspects of the present disclosure is shown. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. The wireless communication system 200 can include a UE 215, which can be as described with reference to FIG. Figure 1 The wireless communication system 200 may include a base station 205 and a base station 210, each of which may be a reference to a base station 205. Figure 1 An example of a base station 105 is described.

[0084] In some examples, the wireless communication system 200 can implement a dual connectivity solution. In the dual connectivity solution, the UE 215 can have a first connection to a first RAT such as NR and a second connection to a second RAT such as LTE. For example, the base station 205 can provide a link 220 for NR communication, and the base station 210 can provide a link 225 for LTE communication. Additionally or alternatively, a single base station 105 (e.g., base station 205 or base station 210) can provide links for both LTE communication and NR communication.

[0085] In some cases, the UE 215 may be configured with multiple cells for a single RAT. For example, the base station 205 may provide a first cell or a first component carrier for NR and a second cell or a second component carrier for NR. In some cases, the first cell and the second cell for NR may be at different frequencies and may each provide a communication link for NR communication via the base station 205.

[0086] The wireless communication system 200 may support MIMO communication. For example, the UE 215 and at least the base station 205 may communicate with each other using multiple transmit and receive antennas. There may be different data streams for transmitting information using the multiple antennas. In some cases, each data stream may be referred to as a MIMO layer, where the number of MIMO layers used for MIMO communication may be based on the number of transmit antennas and receive antennas used for MIMO communication (and therefore, the number of data streams).

[0087] UE 215 may indicate UE capabilities corresponding to the number of supported MIMO layers. For example, UE 215 may send a message indicating UE capabilities associated with the maximum number of MIMO layers supported by UE 215 for MIMO communications. In some cases, UE capabilities may be different or specific to certain RATs or component carriers.

[0088] The UE 215 may be configured with MIMO layers for MIMO communications for one or more of the RATs. In some cases, the network may configure the UE 215 with multiple MIMO layers based on the UE capabilities. A cell providing a first RAT (e.g., NR) may allocate up to a maximum number of MIMO layers in a physical downlink shared channel configuration per serving cell configuration. A cell providing a second RAT (e.g., LTE) may allocate up to a maximum number of MIMO layers in an information element (e.g., an "antennaInfoDedicated" information element) on a per-UE basis. The MIMO layer configuration may be applied in a standalone implementation of NR (e.g., with or without carrier aggregation), NR dual connectivity, or EUTRA-NR dual connectivity (e.g., 4G-5G dual connectivity).

[0089] UE 215 may receive a MIMO configuration and allocate at least as many receive resources as for each serving cell of a RAT or component carrier of the network. The resources or receive resources may correspond to processing chains or UE processing components or capabilities. For example, UE 215 may be configured with six downlink MIMO layers, and UE 215 may allocate six or more receive resources to process downlink signaling for the downlink MIMO layers.

[0090] UE 215 may have some unused receive resources after allocating the downlink MIMO layers. For example, UE 215 may be configured with six downlink MIMO layers, but UE 215 may support up to eight downlink MIMO layers, or UE 215 may have eight available receive resources. After allocating the receive resources to the downlink MIMO layers, UE 215 may have two unused receive resources.

[0091] The wireless communication system 200 may support techniques for improving data throughput by allocating unused resources. For example, the UE 215 may assign unused receive resources between different RATs, cells, or component carriers to improve throughput for MIMO communications.

[0092] In some cases, the UE 215 may determine which assignment of resources to a serving cell improves data throughput. For example, the UE 215 may determine scores or values ​​for various configurations based on assigning unused resources to certain serving cells. The score for each configuration may be a total score for each serving cell. The UE may compare the scores for the different configurations and allocate unused resources based on the configuration with the highest score. A high score may correspond to an increase in data throughput or reliability or a reduction in latency or communication failures.

[0093] The UE 215 may determine the assignment of unused resources based on the bandwidth of the frequency carrier used for the serving cell, the effective downlink bandwidth ratio for the serving cell, the number of received resources allocated to the serving cell, or any combination thereof. In some cases, a score for a configuration may be determined based on the bandwidth of the frequency carrier used for the serving cell, the effective downlink bandwidth ratio, and the number of received resources allocated to the serving cell. For example, a score for each configuration k may be determined based on equation (1), where j corresponds to the serving cell. In some cases, the UE 215 may determine the resource allocation that provides the highest score.

[0094] (1) Score(k)=∑ j Num_Rx(j,k)*BW(j)*DL_Ratio(j)

[0095] In some cases, the allocation of unused resources may be based on the downlink bandwidth ratio of the cell. In some cases, the downlink bandwidth ratio of the cell may be based on whether the cell is configured for time division duplexing or frequency division duplexing. Additionally or alternatively, the downlink bandwidth ratio of the cell may be based on the RAT of the cell (e.g., LTE or NR). In some cases, for a cell configured for FDD, the downlink bandwidth ratio may be 1 or 100%. For example, LTE FDD and NR FDD may each have a downlink bandwidth ratio of 1 or 100%.

[0096] For TDD cells, the downlink bandwidth ratio may be less than 1 or 100% because some symbols or time slots may not be configured for downlink signaling. For LTE TDD, the downlink bandwidth ratio may be based on the uplink-downlink configuration, the special subframe configuration, or both. For example, UE 215 may be configured with an uplink-downlink configuration for a second RAT (e.g., LTE), where each radio frame has six downlink subframes, two uplink subframes, and one special subframe (e.g., uplink-downlink configuration 2). In some cases, for six downlink subframes per radio slot, the downlink bandwidth ratio for the LTE TDD cell may be 0.6. In some cases, a special subframe configuration for the LTE TDD configuration may be considered. For example, if the LTE TDD configuration has an uplink-downlink configuration 2 and a special subframe configuration 0, the downlink bandwidth ratio may be 0.643.

[0097] For NR TDD, the downlink bandwidth ratio may be based on the configured number of downlink slots or downlink symbols for each uplink-downlink cycle. For example, within a downlink-uplink transmission cycle, a certain number of slots or symbols may be used for downlink signaling, and a certain number of slots or symbols may be used for uplink signaling. In some cases, the UE 215 may receive an indication of the uplink-downlink cycle configuration, including the transmission period, the number of downlink slots, the number of downlink symbols, the number of uplink slots, the number of uplink symbols, or any combination thereof. In some cases, NR TDD may use a downlink bandwidth ratio of a fixed value, such as 0.75 or 75%. For example, a typical downlink to uplink traffic ratio may be three to one, or three downlink symbols out of four total symbols, which may correspond to a downlink bandwidth ratio of 75%.

[0098] Based on the downlink bandwidth ratio for different cells, UE 215 can determine the allocation for the remaining reception resources. In this example, UE 215 can be configured with a 20MHz LTE TDD cell (e.g., a first cell) with a downlink bandwidth ratio of 0.6, a 50MHz NR FDD cell (e.g., a second cell), and a 100MHz NR TDD cell (e.g., a third cell) with a downlink bandwidth ratio of 0.75, wherein UE 215 is configured for LTE-NR dual connectivity with one downlink LTE cell and two downlink NR cells. Each cell can have two reception resources already allocated, and UE 215 can have two remaining or unallocated reception resources. In a first configuration (e.g., k=1), unused resources can be assigned to the first cell. Using equation (1), UE 215 can determine a first score 298 for the first configuration. For example, for the first equation, using equation (1), 4*20*0.6+2*50*1+2*100*0.75=298. In a second configuration (e.g., k=2), the unused resources may be assigned to the second cell. Using equation (1), UE 215 may determine a second score 374 for the second configuration. For example, for the second configuration, using equation (1), 2*20*0.6+4*50*1+2*100*0.75=374. In a third configuration (e.g., k=3), the unused resources may be assigned to the third cell. Using equation (1), UE 215 may determine a third score 424 for the third configuration. For example, for the third configuration, using equation (1), 2*20*0.6+2*50*1+4*100*0.75=424. Therefore, the third configuration may have the highest score, and the UE 215 may assign unused resources to the third cell.

[0099] In some cases, the UE 215 may assign unused resources to the frequency carrier cell with the highest gain. In some cases, the UE 215 may assign unused resources (e.g., one at a time) to a frequency serving cell until all unused resources have been assigned. Frequency carrier or serving cell j may have a gain equal to the bandwidth of the frequency carrier multiplied by the downlink bandwidth ratio of the frequency carrier, as shown in equation (2).

[0100] (2) Gain(j)=BW(j)*DL_Ratio(j)

[0101] In some cases, gain may be prioritized when assigning unused resources. For example, the greater the gain of a frequency carrier, the higher the priority for assigning unused resources. UE 215 may assign unused resources to the serving cell with the highest gain (e.g., based on UE capabilities) until UE 215 has assigned all unused resources.

[0102] In one example, UE 215 may be configured with three cells. A first cell (e.g., j=1) may be configured for LTE TDD with a 20 MHz bandwidth and an uplink-downlink configuration with a downlink bandwidth ratio of 0.6. A second cell (e.g., j=2) may be configured for NR FDD with a 50 MHz bandwidth. A third cell (e.g., j=3) may be configured for NR TDD with a downlink bandwidth of 0.75. Using equation (2), the first gain for the first cell may be 12, the second gain for the second cell may be 50, and the third gain for the third cell may be 75. The third cell may have the largest gain, so UE 215 may assign unused resources to the third cell. In some cases, the third cell may have the highest priority for assigning unused resources based on having the highest gain.

[0103] In some cases, UE 215 may allocate unused resources based on reference signal measurements for a cell. For example, UE 215 may determine reference signal measurements for each RAT, component carrier, or serving cell and make allocations based on the reference signal measurements. In some cases, channel characteristics that may be indicated by reference signal measurements may affect data speeds. Reference signal received power (RSRP) measurements or reference signal received quality (RSRQ) measurements or both may be examples of reference signal measurements. Reference signal measurements may be applied to equation (1) to determine a score or to equation (2) to determine a gain. For example, reference signal measurements may be used to determine a score (as shown in equation (3)) or to determine a gain (as shown in equation (4)).

[0104] (3) Score(k)=∑ j f(RSRP / RSRQ)*Num_Rx(j,k)*BW(j)*DL_Ratio(j)

[0105] (4) Gain(j)=f(RSRP / RSRQ)*BW(j)*DL_Ratio(j)

[0106] In some cases, the UE 215 may apply a monotonically increasing function of RSRP or RSRQ or both. For example, f(RSRP / RSRQ) may be an example of a monotonically increasing function of RSRP measurement results or RSRQ measurement results or both. The monotonically increasing function may indicate the data rate as a function of RSRP or RSRQ measurement results.

[0107] In some cases, the determined gain or score may be linear as a function of the number of received resources or the number of additional received resources. The UE 215 may use the score or gain equation as a monotonically increasing function. For example, the UE 215 may apply a monotonically increasing nonlinear function Num_Rx(j,k) when determining the score or gain for a configuration or cell.

[0108] Using the described techniques, the UE 215 can identify cells, RATs, or component carriers for allocating unused resources. The UE 215 can then assign any unused resources to the identified cells, RATs, or component carriers. Assigning unused resources can increase the data rate for MIMO communication. For example, using additional resources can improve data processing or data throughput for the assigned cells, RATs, or component carriers. The UE 215 can assign unused resources to the same cell or different cells. In some cases, the UE 215 can use different determinations (e.g., determining a score, determining a gain, whether to apply a monotonically increasing function, etc.) for different unused resources. These techniques can be applied to LTE-NR, LTE carrier aggregation, NR carrier aggregation, NR-NR dual connectivity where multiple frequencies or LTE cells are present, standalone NR, LTE-NR dual connectivity, or any combination thereof.

[0109] Figure 3 An example of a resource assignment 300 supporting techniques for allocating receive resources in accordance with aspects of the present disclosure is shown. In some examples, resource assignment 300 can implement aspects of wireless communication system 100.

[0110] As reference Figure 2As described, UE 115 may send a message indicating the UE capabilities for MIMO communication to the serving cell. In some cases, UE 115 may indicate the number of downlink MIMO layers supported by UE 115 for MIMO communication. UE 115 may receive a downlink MIMO configuration from the serving cell, which may be provided by base station 105. For example, UE 115 may be served by three cells. A first cell may provide LTE communication at a first frequency (e.g., f1). A second cell may provide NR communication at a second frequency (e.g., f2), and a third cell may provide NR communication at a third frequency (e.g., f3). The first cell, the second cell, and the third cell may each be configured with two downlink MIMO layers.

[0111] UE 115 may allocate resources to cells for downlink MIMO layers. For example, UE 115 may allocate two resources to each of the first cell, the second cell, and the third cell. For example, UE 115 may allocate resource 320 to the first cell 305 and resource 325 to the second cell 310 and the third cell 315. Thus, UE 115 may have allocated six resources to the first cell 305, the second cell 310, and the third cell 315. However, UE 115 is capable of supporting up to eight receive resources. Therefore, UE 115 may have two unused resources 330. UE 115 may implement Figure 2 Describes techniques for determining how to allocate unused resources.

[0112] Figure 4 An example of a resource assignment 400 supporting techniques for allocating receive resources in accordance with aspects of the present disclosure is shown. In some examples, resource assignment 400 can implement aspects of wireless communication system 100.

[0113] As reference Figure 3 As shown, UE 115 can allocate resources to a cell with a downlink MIMO layer and still have some unused or unallocated resources. UE 115 can implement techniques for determining cells that can provide improved data throughput or conditions if allocated unused resources. Resource assignment 400 shows an example of resource assignment after assigning unused resources.

[0114] For example, UE 115 may determine to allocate unused resources to third cell 415. Therefore, UE 115 may allocate resource 420 to first cell 405 and allocate resource 425 to second cell 410 and third cell 415. In this example, two receive resources may be allocated to second cell 410, and four receive resources may be allocated to third cell 415. Third cell 415 may have two resources from the initial allocation and another two resources from any remaining resources assigned by UE 115. In this example, UE 115 may use all eight resources, which may improve data throughput (e.g., for at least third cell 415) compared to using only six resources according to the initial assignment. In some other examples, unused resources may be assigned to different cells. For example, one unused resource may be assigned to first cell 405, and another unused resource may be assigned to third cell 415.

[0115] Figure 5 An example of a process flow 500 supporting techniques for allocating receive resources according to aspects of the present disclosure is shown. In some examples, the process flow 500 can implement aspects of the wireless communication system 100. The process flow 500 can be performed by the base station 505 and the UE 515 or both (which can be referenced to FIG. Figure 1 The embodiment may be implemented with reference to the accompanying drawings and the corresponding examples of the UE 115 and the base station 105 described in detail.

[0116] At 510 , UE 515 may send a UE capability message to base station 505 associated with the number of downlink MIMO layers supported at UE 515 .

[0117] At 520, UE 515 may receive a configuration for a downlink MIMO layer set based on the UE capability message from base station 505. The configuration may include at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell. For example, the first cell may be an NR cell (e.g., in a dual connectivity configuration), and the second cell may be an LTE cell (e.g., in a dual connectivity configuration).

[0118] At 525, the UE 515 may allocate a first set of resources to the first cell, the second cell, or both based on the first subset and the second subset of the number of downlink MIMO layers. For example, the UE 515 may allocate one resource (e.g., one receive resource) for each downlink MIMO layer configured for the first cell and the second cell.

[0119] At 530, UE 515 may determine that the second set of resources is not allocated to the downlink MIMO layer set. For example, after allocating the first set of resources, UE 515 may determine that some resources (e.g., the second set of resources) at UE 515 are not used or allocated. To improve data throughput for one or more cells, UE 515 may allocate the second set of resources to one or more of the cells.

[0120] At 535, the UE 515 may allocate the second set of resources to the first cell or the second cell, or any combination thereof, based on the determination that the second set of resources is not allocated. For example, the UE 515 may allocate the second set of resources to the second cell to increase the data rate for the second cell. In some cases, the UE 515 may improve data processing or otherwise increase data throughput by allocating unused resources. The UE 515 may allocate the second set of resources to the second cell based on the determination that the second set of resources is not allocated. Figure 2 The described techniques determine to which one or more cells, component carriers, or RATs the unused resources are allocated. For example, the UE 515 may allocate the second set of resources based on the following: the respective frequency bandwidths used for the first cell and the second cell, the respective downlink bandwidth ratios used for the first cell and the second cell, or the respective quantities of resources allocated to the first cell and the second cell, or any combination thereof. In some cases, the allocation may be based on the gains of the first cell and the second cell. Additionally or alternatively, the UE 515 may allocate the second set of resources based on applying a monotonically increasing function to the score or gain determined for the first cell or the second cell.

[0121] Figure 6 A block diagram 600 of a device 605 supporting techniques for allocating receive resources according to aspects of the present disclosure is shown. The device 605 can be an example of aspects of the UE 115 as described herein. The device 605 can include a receiver 610, a communication manager 615, and a transmitter 620. The device 605 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0122] The receiver 610 may 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 techniques for allocating reception resources). The information may be passed to other components of the device 605. The receiver 610 may be a reference Figure 9 Examples of various aspects of the transceiver 915 are described. The receiver 610 may utilize a single antenna or a group of antennas.

[0123] The communication manager 615 may perform the following operations: sending a UE capability message associated with the number of downlink MIMO layers supported at the UE to the base station; receiving a configuration for a downlink MIMO layer set based on the UE capability message from the base station, the configuration including at least a first subset of the number of downlink MIMO layers configured for the first cell and a second subset of the number of downlink MIMO layers configured for the second cell; allocating a first set of resources to the first cell or the second cell or both based on the first subset and the second subset of the number of downlink MIMO layers; determining that the second set of resources is not allocated to the downlink MIMO layer set; and allocating a second set of resources to the first cell or the second cell or any combination thereof based on the determination that the second set of resources is not allocated. The communication manager 615 may be an example of aspects of the communication manager 910 described herein.

[0124] The communication manager 615 or its subcomponents may be implemented in hardware, in code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 615 or its subcomponents may be performed 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 this disclosure.

[0125] The communication manager 615 or its subcomponents can be physically located at various locations, including being distributed so that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 615 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 615 or its subcomponents can be combined with one or more other hardware components (including but not limited to input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0126] The actions performed by the UE communication manager 615 as described herein may be implemented to achieve one or more potential advantages. One implementation may allow the UE 115 to increase data throughput by utilizing available resources that might otherwise go unused. Allocating unused resources may increase processing speed at the UE 115 or increase data throughput for one or more cells.

[0127] The transmitter 620 can transmit signals generated by other components of the device 605. In some examples, the transmitter 620 can be co-located with the receiver 610 in a transceiver component. For example, the transmitter 620 can be a reference Figure 9 Examples of aspects of the transceiver 915 are described. The transmitter 620 may utilize a single antenna or a group of antennas.

[0128] Figure 7 A block diagram 700 of a device 705 supporting techniques for allocating receive resources according to aspects of the present disclosure is shown. The device 705 can be an example of aspects of the device 605 or UE 115 as described herein. The device 705 can include a receiver 710, a communication manager 715, and a transmitter 745. The device 705 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0129] The receiver 710 may 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 techniques for allocating reception resources). The information may be passed to other components of the device 705. The receiver 710 may be a reference Figure 9 Examples of various aspects of the transceiver 915 are described. The receiver 710 may utilize a single antenna or a group of antennas.

[0130] Communications manager 715 can be an example of aspects of communications manager 615 as described herein. Communications manager 715 can include UE capabilities component 720, downlink MIMO configuration component 725, initial resource allocation component 730, unallocated resource determination component 735, and remaining resource allocation component 740. Communications manager 715 can be an example of aspects of communications manager 910 as described herein.

[0131] The UE capability component 720 may send a UE capability message associated with the number of downlink MIMO layers supported at the UE to the base station. The downlink MIMO configuration component 725 may receive a configuration for a downlink MIMO layer set based on the UE capability message from the base station, the configuration including at least a first subset of the number of downlink MIMO layers configured for the first cell and a second subset of the number of downlink MIMO layers configured for the second cell. The initial resource allocation component 730 may allocate a first resource set to the first cell, the second cell, or both based on the first subset and the second subset of the number of downlink MIMO layers. The unallocated resource determination component 735 may determine that the second resource set is not allocated to the downlink MIMO layer set. The remaining resource allocation component 740 may allocate a second resource set to the first cell, the second cell, or any combination thereof based on the determination that the second resource set is not allocated.

[0132] The transmitter 745 can transmit signals generated by other components of the device 705. In some examples, the transmitter 745 can be co-located with the receiver 710 in a transceiver component. For example, the transmitter 745 can be a reference Figure 9 Examples of various aspects of the transceiver 915 are described. The transmitter 745 may utilize a single antenna or a group of antennas.

[0133] Figure 8 A block diagram 800 is shown of a communications manager 805 that supports techniques for allocating receive resources in accordance with aspects of the present disclosure. Communications manager 805 can be an example of aspects of communications manager 615, communications manager 715, or communications manager 910 described herein. Communications manager 805 can include a UE capabilities component 810, a downlink MIMO configuration component 815, an initial resource allocation component 820, an unallocated resource determination component 825, a remaining resource allocation component 830, and a downlink bandwidth ratio component 835. Each of these modules or components can be in communication with each other, directly or indirectly (e.g., via one or more buses).

[0134] The UE capability component 810 may send a UE capability message associated with the number of downlink MIMO layers supported at the UE to the base station. The downlink MIMO configuration component 815 may receive, from the base station, a configuration for a set of downlink MIMO layers based on the UE capability message, the configuration including at least a first subset of the number of downlink MIMO layers configured for the first cell and a second subset of the number of downlink MIMO layers configured for the second cell. The initial resource allocation component 820 may allocate a first set of resources to the first cell, the second cell, or both based on the first subset and the second subset of the number of downlink MIMO layers.

[0135] The unallocated resource determining component 825 can determine that the second set of resources is not allocated to the downlink MIMO layer set. The remaining resource allocation component 830 can allocate the second set of resources to the first cell or the second cell, or any combination thereof, based on the determination that the second set of resources is not allocated. In some examples, the remaining resource allocation component 830 can allocate the second set of resources based on the following: the respective frequency bandwidths used for the first cell and the second cell, the respective downlink bandwidth ratios used for the first cell and the second cell, or the respective amounts of resources allocated to the first cell and the second cell, or any combination thereof.

[0136] The downlink bandwidth ratio component 835 can determine a first downlink bandwidth ratio for the first cell and a second downlink bandwidth ratio for the second cell, wherein the second set of resources is allocated based on the first downlink bandwidth ratio and the second downlink bandwidth ratio. In some examples, the downlink bandwidth ratio component 835 can receive an indication of a frame configuration for the first cell from the base station.

[0137] Figure 9 A diagram of a system 900 including a device 905 supporting techniques for allocating receive resources in accordance with aspects of the present disclosure is shown. The device 905 may be an example of, or include components of, the device 605, device 705, or UE 115 as described herein. The device 905 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communications manager 910, a transceiver 915, an antenna 920, a memory 925, and a processor 935. These components may communicate electronically via one or more buses (e.g., bus 940).

[0138] The communication manager 910 can perform the following operations: sending a UE capability message associated with the number of downlink MIMO layers supported at the UE to the base station; receiving a configuration for a downlink MIMO layer set based on the UE capability message from the base station, the configuration including at least a first subset of the number of downlink MIMO layers configured for the first cell and a second subset of the number of downlink MIMO layers configured for the second cell; allocating a first resource set to the first cell or the second cell or both based on the first subset and the second subset of the number of downlink MIMO layers; determining that the second resource set is not allocated to the downlink MIMO layer set; and allocating a second resource set to the first cell or the second cell or any combination thereof based on the determination that the second resource set is not allocated.

[0139] The transceiver 915 can communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 915 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 915 can also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and demodulating packets received from the antenna.

[0140] In some cases, a wireless device may include a single antenna 920. However, in some cases, the device may have more than one antenna 920 that are capable of sending or receiving multiple wireless transmissions simultaneously.

[0141] The memory 925 may include random access memory (RAM) and read-only memory (ROM). The memory 925 may store computer-readable, computer-executable code 930, which includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 925 may also contain, among other things, a basic input / output system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0142] The code 930 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 930 may be stored in a non-transitory computer-readable medium (e.g., system memory or other types of memory). In some cases, the code 930 may not be directly executable by the processor 935, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0143] The processor 935 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 935 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 935. The processor 935 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 925) to cause the device 905 to perform various functions (e.g., functions or tasks that support a technique for allocating receive resources).

[0144] Figure 10 1. A flow chart illustrating a method 1000 for supporting techniques for allocating reception resources according to aspects of the present disclosure is shown. The operations of the method 1000 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1000 may be implemented by a UE 115 or components thereof as described herein. Figures 6 to 9In some examples, the UE may execute an instruction set to control the functional units of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0145] At 1005, the UE may send a UE capability message to the base station associated with the number of downlink MIMO layers supported at the UE. The operations of 1005 may be performed according to the methods described herein. In some examples, aspects of the operations of 1005 may be as described with reference to Figures 6 to 9 The UE capability components described are used to perform the

[0146] At 1010, the UE may receive a configuration for a downlink MIMO layer set based on a UE capability message from a base station, the configuration including at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell. The operations of 1010 may be performed according to the methods described herein. In some examples, aspects of the operations of 1010 may be as described with reference to Figures 6 to 9 The described downlink MIMO configuration components are performed.

[0147] At 1015, the UE may allocate a first set of resources to the first cell or the second cell or both based on the first subset and the second subset of the number of downlink MIMO layers. The operations of 1015 may be performed according to the methods described herein. In some examples, aspects of the operations of 1015 may be as described with reference to Figures 6 to 9 The initial resource allocation component described is performed.

[0148] At 1020, the UE may determine that the second set of resources is not allocated to the downlink MIMO layer set. The operations of 1020 may be performed according to the methods described herein. In some examples, aspects of the operations of 1020 may be as described with reference to Figures 6 to 9 The unallocated resources described determine the components to execute.

[0149] At 1025, the UE may allocate the second set of resources to the first cell or the second cell, or any combination thereof, based on a determination that the second set of resources is not allocated. The operations of 1025 may be performed according to the methods described herein. In some examples, aspects of the operations of 1025 may be as described with reference to Figures 6 to 9 The remaining resources described are allocated to the components for execution.

[0150] Figure 111. A flow chart illustrating a method 1100 for supporting techniques for allocating reception resources according to aspects of the present disclosure is shown. The operations of the method 1100 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1100 may be implemented by a UE 115 or components thereof as described herein. Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional units of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0151] At 1105, the UE may send a UE capability message to the base station associated with the number of downlink MIMO layers supported at the UE. The operations of 1105 may be performed according to the methods described herein. In some examples, aspects of the operations of 1105 may be as described with reference to Figures 6 to 9 The UE capability components described are used to perform the

[0152] At 1110, the UE may receive a configuration for a downlink MIMO layer set based on a UE capability message from a base station, the configuration including at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell. The operations of 1110 may be performed according to the methods described herein. In some examples, aspects of the operations of 1110 may be as described with reference to Figures 6 to 9 The described downlink MIMO configuration components are performed.

[0153] At 1115, the UE may allocate a first set of resources to the first cell or the second cell or both based on the first subset and the second subset of the number of downlink MIMO layers. The operations of 1115 may be performed according to the methods described herein. In some examples, aspects of the operations of 1115 may be as described with reference to Figures 6 to 9 The initial resource allocation component described is performed.

[0154] At 1120, the UE may determine that the second set of resources is not allocated to the downlink MIMO layer set. The operations of 1120 may be performed according to the methods described herein. In some examples, aspects of the operations of 1120 may be as described with reference to Figures 6 to 9 The unallocated resources described determine the components to execute.

[0155] At 1125, the UE may determine a first downlink bandwidth ratio for the first cell and a second downlink bandwidth ratio for the second cell. The operations of 1125 may be performed according to the methods described herein. In some examples, aspects of the operations of 1125 may be as described with reference to Figures 6 to 9 Describes the downlink bandwidth ratio component to perform.

[0156] At 1130, the UE may allocate the second set of resources to the first cell or the second cell, or any combination thereof, based on a determination that the second set of resources is not allocated. In some cases, the second set of resources is allocated based on a first downlink bandwidth ratio and a second downlink bandwidth ratio. The operations of 1130 may be performed according to the methods described herein. In some examples, aspects of the operations of 1130 may be as described with reference to Figures 6 to 9 The remaining resources described are allocated to the components for execution.

[0157] Figure 12 A flow chart illustrating a method 1200 for supporting techniques for allocating reception resources according to aspects of the present disclosure is shown. The operations of the method 1200 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1200 may be implemented by a UE 115 or components thereof as described herein. Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional units of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0158] At 1205, the UE may send a UE capability message to the base station associated with the number of downlink MIMO layers supported at the UE. The operations of 1205 may be performed according to the methods described herein. In some examples, aspects of the operations of 1205 may be as described with reference to Figures 6 to 9 The UE capability components described are used to perform the

[0159] At 1210, the UE may receive a configuration for a downlink MIMO layer set based on a UE capability message from a base station, the configuration including at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell. The operations of 1210 may be performed according to the methods described herein. In some examples, aspects of the operations of 1210 may be as described with reference to Figures 6 to 9 The described downlink MIMO configuration components are performed.

[0160] At 1215, the UE may allocate a first set of resources to the first cell or the second cell or both based on the first subset and the second subset of the number of downlink MIMO layers. The operations of 1215 may be performed according to the methods described herein. In some examples, aspects of the operations of 1215 may be as described with reference to Figures 6 to 9 The initial resource allocation component described is performed.

[0161] At 1220, the UE may determine that the second set of resources is not allocated to the downlink MIMO layer set. The operations of 1220 may be performed according to the methods described herein. In some examples, aspects of the operations of 1220 may be as described with reference to Figures 6 to 9 The unallocated resources described determine the components to execute.

[0162] At 1225, the UE may determine a first gain for the first cell and a second gain for the second cell. The operations of 1225 may be performed according to the methods described herein. In some examples, aspects of the operations of 1225 may be as described with reference to Figures 6 to 9 The description is undefined to execute.

[0163] At 1230, the UE may allocate the second set of resources based on the higher of the first gain or the second gain. The UE may allocate the second set of resources to the first cell or the second cell, or any combination thereof, based on a determination that the second set of resources is not allocated. The operations of 1230 may be performed according to the methods described herein. In some examples, aspects of the operations of 1230 may be as described with reference to Figures 6 to 9 The description is undefined to execute.

[0164] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified, and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0165] The following provides an overview of various aspects of the disclosure:

[0166] Aspect 1: A method for wireless communication at a UE, comprising: sending a UE capability message associated with the number of downlink multiple-input multiple-output (MIMO) layers supported at the UE to a base station; receiving a configuration for a downlink MIMO layer set from the base station based at least in part on the UE capability message, the configuration comprising at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell; allocating a first resource set to the first cell or the second cell or both based at least in part on the first subset and the second subset of the number of downlink MIMO layers; determining that a second resource set is not allocated to the downlink MIMO layer set; and allocating the second resource set to the first cell or the second cell or any combination thereof based at least in part on the determination that the second resource set is not allocated.

[0167] Aspect 2: A method according to Aspect 1, wherein allocating the second set of resources includes: allocating the second set of resources based at least in part on: the corresponding frequency bandwidth used for the first cell and the second cell, the corresponding downlink bandwidth ratio used for the first cell and the second cell, or the corresponding number of resources allocated to the first cell and the second cell, or any combination thereof.

[0168] Aspect 3: The method according to any one of Aspects 1 to 2 further includes: determining a first downlink bandwidth ratio for the first cell and a second downlink bandwidth ratio for the second cell, wherein the second resource set is allocated at least in part based on the first downlink bandwidth ratio and the second downlink bandwidth ratio.

[0169] Aspect 4: The method according to aspect 3, wherein the first downlink bandwidth ratio and the second downlink bandwidth ratio are based at least in part on whether the first cell and the second cell are configured for frequency division duplexing or time division duplexing.

[0170] Aspect 5: The method according to any one of aspects 3 to 4, wherein the first downlink bandwidth ratio is determined at least in part based on a frame configuration for the first cell, the first cell being configured for time division duplexing.

[0171] Aspect 6: The method according to aspect 5 further includes: receiving an indication of the frame configuration for the first cell from the base station.

[0172] Aspect 7: The method according to any one of aspects 5 to 6, wherein the first downlink bandwidth ratio is determined at least in part based on a special subframe configuration for the first cell.

[0173] Aspect 8: A method according to any one of Aspects 3 to 7, wherein the second downlink bandwidth ratio is determined at least in part based on the number of downlink symbols in each downlink time slot and the number of downlink time slots in each uplink-downlink cycle for the second cell, and the second cell is configured for time division duplexing.

[0174] Aspect 9: The method according to aspect 8 further includes: receiving an indication of the number of downlink symbols in each downlink time slot and the number of downlink time slots in each uplink-downlink cycle for the second cell from the base station.

[0175] Aspect 10: The method according to any one of Aspects 1 to 9 further includes: determining a first gain for the first cell and a second gain for the second cell; and allocating the second resource set based at least in part on the higher gain of the first gain or the second gain.

[0176] Aspect 11: A method according to Aspect 10, wherein the first gain is at least partially based on the first downlink bandwidth of the first cell and the first downlink bandwidth ratio of the first cell, and the second gain is at least partially based on the second downlink bandwidth of the second cell and the second downlink bandwidth ratio of the second cell.

[0177] Aspect 12: The method according to any one of Aspects 3 to 11 further includes: determining a first reference signal measurement for the first cell and a second reference signal measurement for the second cell, wherein allocating the second resource set is at least partially based on the first reference signal measurement and the second reference signal measurement.

[0178] Aspect 13: The method according to aspect 12, wherein the first reference signal measurement and the second reference signal measurement are based at least in part on corresponding reference signal received power measurements, reference signal received quality measurements, or both.

[0179] Aspect 14: The method according to any one of aspects 1 to 13, wherein the first cell is a new radio cell of a dual connectivity configuration, and the second cell is a long term evolution cell of the dual connectivity configuration.

[0180] Aspect 15: The method according to any one of Aspects 1 to 14 further includes: determining a first efficiency value based at least in part on allocating the second set of resources to the first cell; determining a second efficiency value based at least in part on allocating the second set of resources to the second cell; and comparing the first efficiency value with the second efficiency value, wherein the second set of resources is allocated at least in part based on the comparison.

[0181] Aspect 16: The method of aspect 15, further comprising: applying a monotonically increasing function to the first efficiency value and the second efficiency value, wherein the comparing is based at least in part on applying the monotonically increasing function.

[0182] Aspect 17: The method according to any one of Aspects 1 to 16 further includes: receiving a request from the base station to send the UE capability message associated with the number of downlink MIMO layers supported at the UE, wherein the UE capability message is sent at least in part based on receiving the request.

[0183] Aspect 18: The method according to any one of aspects 1 to 17 further includes: determining a maximum number of resources, wherein the maximum number of resources corresponds to the first resource set and the second resource set.

[0184] Aspect 19: An apparatus for wireless communication at a UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of aspects 1 to 18.

[0185] Aspect 20: An apparatus for wireless communication at a UE, comprising at least one unit for performing the method according to any one of aspects 1 to 18.

[0186] Aspect 21: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method according to any one of aspects 1 to 18.

[0187] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used throughout much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described herein may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0188] The information and signals described herein may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0189] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed using 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, a plurality of microprocessors, one or more microprocessors in combination with a DSP core, or any other such configuration).

[0190] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or a combination of any of these. Features that implement the functions may also be physically located at various locations, including being distributed so that portions of the functions are implemented at different physical locations.

[0191] Computer readable medium includes non-transitory computer storage medium and communication medium, and communication medium includes any medium that promotes computer program to be transferred from one place to another place.Non-transitory storage medium can be any available medium that can be accessed by general-purpose computer or special-purpose computer.By way of example and not limitation, non-transitory computer readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage device or can be used for carrying or storing desired program code unit in the form of instruction or data structure and any other non-transitory medium that can be accessed by general-purpose or special-purpose computer or general or special-purpose processor.In addition, any connection is suitably referred to as computer readable medium.For example, if software is to be sent from website, server or other remote source using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein 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.

[0192] As used herein (including in the claims), "or" as used in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" could be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based at least in part on" should be interpreted in the same manner as the phrase "based on."

[0193] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number to distinguish between similar components. If only the first reference number is used in the specification, the description applies to any one of the similar components having the same first reference number, regardless of the second reference number or other subsequent reference numbers.

[0194] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that can be implemented or within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration," rather than "preferred" or "having advantages over other examples." The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques can be implemented without these specific details. In some cases, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0195] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the overall principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is intended to be used in the broadest sense consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: sending a UE capability message associated with a number of downlink multiple-input multiple-output (MIMO) layers supported at the UE to a network device; receiving, from the network device, a configuration for a set of downlink MIMO layers based at least in part on the UE capabilities message, the configuration comprising at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell; allocating a first set of resources to the first cell or the second cell, or both, based at least in part on the first subset and the second subset of the number of downlink MIMO layers; determining that a second set of resources is not allocated to the downlink MIMO layer set; as well as The second set of resources is allocated to at least one of the first cell or the second cell based at least in part on a determination that the second set of resources is not allocated.

2. The method according to claim 1, wherein Allocating the second resource set includes: The second set of resources is allocated based at least in part on: respective frequency bandwidths for the first cell and the second cell, respective downlink bandwidth ratios for the first cell and the second cell, or respective quantities of resources allocated to the first cell and the second cell, or any combination thereof.

3. The method according to claim 1, further comprising: A first downlink bandwidth ratio for the first cell and a second downlink bandwidth ratio for the second cell are determined, wherein the second set of resources is allocated based at least in part on the first downlink bandwidth ratio and the second downlink bandwidth ratio.

4. The method according to claim 3, wherein: The first downlink bandwidth ratio and the second downlink bandwidth ratio are based at least in part on whether the first cell and the second cell are configured for frequency division duplexing or time division duplexing.

5. The method according to claim 3, wherein: The first downlink bandwidth ratio is determined based at least in part on a frame configuration for the first cell, wherein the first cell is configured for time division duplexing.

6. The method according to claim 5, further comprising: An indication of the frame configuration for the first cell is received from the network device.

7. The method according to claim 5, wherein: The first downlink bandwidth ratio is determined based at least in part on a special subframe configuration for the first cell.

8. The method according to claim 3, wherein: The second downlink bandwidth ratio is determined based at least in part on a number of downlink symbols per downlink slot and a number of downlink slots per uplink-downlink cycle for the second cell, wherein the second cell is configured for time division duplexing.

9. The method according to claim 8, further comprising: An indication of the number of downlink symbols per downlink timeslot and the number of downlink timeslots per uplink-downlink cycle for the second cell is received from the network device.

10. The method according to claim 1, further comprising: determining a first gain for the first cell and a second gain for the second cell; as well as The second set of resources is allocated based at least in part on a higher gain of the first gain or the second gain.

11. The method according to claim 10, wherein: The first gain is based at least in part on a first downlink bandwidth of the first cell and a first downlink bandwidth ratio of the first cell, and the second gain is based at least in part on a second downlink bandwidth of the second cell and a second downlink bandwidth ratio of the second cell.

12. The method according to claim 1, further comprising: A first reference signal measurement for the first cell and a second reference signal measurement for the second cell are determined, wherein allocating the second set of resources is based at least in part on the first reference signal measurement and the second reference signal measurement.

13. The method according to claim 12, wherein: The first reference signal measurement and the second reference signal measurement are based at least in part on respective reference signal received power measurements, reference signal received quality measurements, or both.

14. The method according to claim 1, wherein The first cell is a new radio cell of a dual connectivity configuration, and the second cell is a long term evolution cell of the dual connectivity configuration.

15. The method according to claim 1, further comprising: determining a first efficiency value based at least in part on allocating the second set of resources to the first cell; determining a second efficiency value based at least in part on allocating the second set of resources to the second cell; as well as The first efficiency value is compared to the second efficiency value, wherein the second set of resources is allocated based at least in part on the comparison.

16. The method according to claim 15, further comprising: A monotonically increasing function is applied to the first efficiency value and the second efficiency value, wherein the comparing is based at least in part on applying the monotonically increasing function.

17. The method according to claim 1, further comprising: A request is received from the network device to send the UE capabilities message associated with the number of downlink MIMO layers supported at the UE, wherein the UE capabilities message is sent based at least in part on receiving the request.

18. The method of claim 1, further comprising: A maximum number of resources is determined, wherein the maximum number of resources corresponds to the first set of resources and the second set of resources.

19. An apparatus for wireless communication at a user equipment (UE), comprising: processor, memory in electronic communication with the processor, and Instructions, which are stored in the memory and executable by the processor to cause the device to perform the following operations: sending a UE capability message associated with a number of downlink multiple-input multiple-output (MIMO) layers supported at the UE to a network device; receiving, from the network device, a configuration for a set of downlink MIMO layers based at least in part on the UE capabilities message, the configuration comprising at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell; allocating a first set of resources to the first cell or the second cell, or both, based at least in part on the first subset and the second subset of the number of downlink MIMO layers; determining that a second set of resources is not allocated to the downlink MIMO layer set; as well as The second set of resources is allocated to at least one of the first cell or the second cell based at least in part on a determination that the second set of resources is not allocated.

20. The device according to claim 19, wherein The instructions for allocating the second set of resources are executable by the processor to cause the apparatus to: The second set of resources is allocated based at least in part on: respective frequency bandwidths for the first cell and the second cell, respective downlink bandwidth ratios for the first cell and the second cell, or respective quantities of resources allocated to the first cell and the second cell, or any combination thereof.

21. The apparatus according to claim 19, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: A first downlink bandwidth ratio for the first cell and a second downlink bandwidth ratio for the second cell are determined, wherein the second set of resources is allocated based at least in part on the first downlink bandwidth ratio and the second downlink bandwidth ratio.

22. The device according to claim 21, wherein The first downlink bandwidth ratio and the second downlink bandwidth ratio are based at least in part on whether the first cell and the second cell are configured for frequency division duplexing or time division duplexing.

23. The device according to claim 21, wherein The first downlink bandwidth ratio is determined based at least in part on a frame configuration for the first cell, wherein the first cell is configured for time division duplexing.

24. The device according to claim 23, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: An indication of the frame configuration for the first cell is received from the network device.

25. The apparatus according to claim 23, wherein The first downlink bandwidth ratio is determined based at least in part on a special subframe configuration for the first cell.

26. The apparatus according to claim 21, wherein The second downlink bandwidth ratio is determined based at least in part on a number of downlink symbols per downlink slot and a number of downlink slots per uplink-downlink cycle for the second cell, wherein the second cell is configured for time division duplexing.

27. The device according to claim 26, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: An indication of the number of downlink symbols per downlink timeslot and the number of downlink timeslots per uplink-downlink cycle for the second cell is received from the network device.

28. The apparatus according to claim 19, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: determining a first gain for the first cell and a second gain for the second cell; and The second set of resources is allocated based at least in part on a higher gain of the first gain or the second gain.

29. The apparatus according to claim 28, wherein The first gain is based at least in part on a first downlink bandwidth of the first cell and a first downlink bandwidth ratio of the first cell, and the second gain is based at least in part on a second downlink bandwidth of the second cell and a second downlink bandwidth ratio of the second cell.

30. The apparatus according to claim 19, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: A first reference signal measurement for the first cell and a second reference signal measurement for the second cell are determined, wherein allocating the second set of resources is based at least in part on the first reference signal measurement and the second reference signal measurement.

31. The device according to claim 30, wherein The first reference signal measurement and the second reference signal measurement are based at least in part on respective reference signal received power measurements, reference signal received quality measurements, or both.

32. The apparatus of claim 19, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: determining a first efficiency value based at least in part on allocating the second set of resources to the first cell; determining a second efficiency value based at least in part on allocating the second set of resources to the second cell; as well as The first efficiency value is compared to the second efficiency value, wherein the second set of resources is allocated based at least in part on the comparison.

33. The apparatus according to claim 32, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: A monotonically increasing function is applied to the first efficiency value and the second efficiency value, wherein the comparing is based at least in part on applying the monotonically increasing function.

34. The apparatus of claim 19, wherein: The instructions may also be executed by the processor to cause the device to perform the following operations: A request is received from the network device to send the UE capabilities message associated with the number of downlink MIMO layers supported at the UE, wherein the UE capabilities message is sent based at least in part on receiving the request.

35. The apparatus of claim 19, wherein The instructions may also be executed by the processor to cause the device to perform the following operations: A maximum number of resources is determined, wherein the maximum number of resources corresponds to the first set of resources and the second set of resources.

36. An apparatus for wireless communication at a user equipment (UE), comprising: means for sending a UE capability message associated with a number of downlink multiple-input multiple-output (MIMO) layers supported at the UE to a network device; means for receiving, from the network device, a configuration for a set of downlink MIMO layers based at least in part on the UE capabilities message, the configuration comprising at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell; means for allocating a first set of resources to the first cell or the second cell, or both, based at least in part on the first subset and the second subset of the number of downlink MIMO layers; means for determining that a second set of resources is not allocated to the downlink MIMO layer set; as well as Means for allocating the second set of resources to at least one of the first cell or the second cell based at least in part on a determination that the second set of resources is not allocated.

37. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to: sending a UE capability message associated with a number of downlink multiple-input multiple-output (MIMO) layers supported at the UE to a network device; receiving, from the network device, a configuration for a set of downlink MIMO layers based at least in part on the UE capabilities message, the configuration comprising at least a first subset of the number of downlink MIMO layers configured for a first cell and a second subset of the number of downlink MIMO layers configured for a second cell; allocating a first set of resources to the first cell or the second cell, or both, based at least in part on the first subset and the second subset of the number of downlink MIMO layers; determining that a second set of resources is not allocated to the downlink MIMO layer set; as well as The second set of resources is allocated to at least one of the first cell or the second cell based at least in part on a determination that the second set of resources is not allocated.

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