Signaling buffer size capability

Abstract

Methods, systems, and apparatus for wireless communications are described. A communications device, such as user equipment, may identify a size capability of a buffer associated with a protocol layer of the UE. The buffer may be a layer 2 buffer, and the protocol layer may be a layer 2 protocol layer. The UE may transmit an indication of the identified size capability of the buffer to a base station serving the UE. In some cases, the UE may transmit an indication of the identified size capability in a UE capability report in radio resource control signaling. The UE may then communicate with a base station 105 data scheduled based on the transmitted indication.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. patent application No. 17 / 156,495, entitled “SIGNALING BUFFERSIZE CAPABILITY,” filed by MEYLAN et al. on January 22, 2021, and U.S. Provisional Patent Application No. 62 / 966,404, entitled “SIGNALING BUFFER SIZE CAPABILITY,” filed by MEYLAN et al. on January 27, 2020, each of which is assigned to the assignee of this application and is expressly incorporated herein by reference.

[0003] background

[0004] The following relates generally to wireless communications and, more particularly, to signaling buffer size capabilities.

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems), and fifth generation (5G) systems, which may be referred to as new radio (NR) systems. These systems may employ various 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).

[0006] A wireless multiple access communication system may include several base stations or network access nodes, each of which simultaneously supports communication for multiple communication devices, each of which may be further referred to as user equipment (UE). Some wireless communication systems may support determining buffer size as a function of physical layer data rate. As the demand for communication efficiency grows, improved techniques for buffer size determination are therefore desired.

[0007] Overview

[0008] The described technology relates to improved methods, systems, devices and apparatuses for supporting signaling buffer size capabilities. In general, the described technology provides signaling for configuring a communication device (which may be a user equipment (UE)) to support a buffer size capability of a second layer buffer. For example, the UE signals to a base station that the UE supports the buffer size capability. The signaled buffer size may be an actual size or a maximum size supported by the UE. In other examples, the UE may select a preferred size for the buffer of the UE and signal the preferred size as the buffer size capability. A communication device (such as a UE) may operate in a dual connectivity mode or a standalone mode. In some examples, a communication device (such as a UE) may identify the size capability of a buffer associated with a protocol layer of the UE. For example, the UE may determine the second layer buffer size available at the UE. According to some examples, the UE may transmit an indication of the size capability. For example, the UE may include the indication in a UE capability report, and the UE capability report may be transmitted via a base station serving the UE. Upon receiving the indication, the base station may determine the size capability of the second layer buffer of the UE. The base station may then determine the resource scheduling to be used to transmit data to the UE. In some examples, resource scheduling can be based on the size capabilities of the second layer buffer. The UE and the base station can then communicate according to the determined schedule. As the demand for communication efficiency grows, the described techniques can provide signaling of the second layer buffer size to enable communication devices to experience improvements in power consumption, spectral efficiency, and higher data rates, and in some examples can promote enhanced efficiency for high reliability and low latency communication operations, and other benefits.

[0009] A method of wireless communication at a UE is described. The method may include: identifying a size capability of a buffer associated with a protocol layer of the UE; transmitting an indication of the identified size capability of the buffer to a base station serving the UE; and communicating data scheduled based on the transmitted indication with the base station.

[0010] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: identify a size capability of a buffer associated with a protocol layer of the UE; transmit an indication of the identified size capability of the buffer to a base station serving the UE; and communicate data scheduled based on the transmitted indication with the base station.

[0011] Another apparatus for wireless communication at a UE is described. The apparatus may include means for: identifying a size capability of a buffer associated with a protocol layer of the UE; transmitting an indication of the identified size capability of the buffer to a base station serving the UE; and communicating data scheduled based on the transmitted indication with the base station.

[0012] 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 for: identifying a size capability of a buffer associated with a protocol layer of the UE; transmitting an indication of the identified size capability of the buffer to a base station serving the UE; and communicating data scheduled based on the transmitted indication with the base station.

[0013] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the communication may include operations, features, means, or instructions for the following actions: receiving downlink data scheduled based on the transmitted indication from the base station. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the communication may include operations, features, means, or instructions for the following actions: receiving scheduling information for uplink data scheduled based on the transmitted indication from the base station; and transmitting the uplink data to the base station according to the received scheduling information.

[0014] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, transmitting an indication of the identified size capabilities may include operations, features, means, or instructions for the following actions: transmitting an indication of the identified size capabilities in a UE capability report in radio resource control signaling. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the transmitting may include operations, features, means, or instructions for the following actions: transmitting the UE capability report via the base station.

[0015] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for transmitting an indication of a preference to the UE associated with allocating the buffer between downlink communications and uplink communications.

[0016] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting an indication of an identified size capability may include operations, features, devices, or instructions for the following actions: transmitting an indication of the identified size capability in a media access control (MAC) control element to a base station serving the UE.

[0017] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: determining that the UE can be configured to operate in a dual connectivity mode, wherein the size capability of identifying the buffer can be based on determining that the UE can be configured to operate in a dual connectivity mode. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the dual connectivity mode includes at least one of a multi-radio dual connectivity mode, a new radio dual connectivity mode, a long term evolution (LTE) dual connectivity mode, or a combination thereof.

[0018] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for determining that the UE is configured to operate in at least one of a standalone mode or a dual connectivity mode, wherein the second size capability of the buffer is based on determining that the UE is configured to operate in the standalone mode, and the third size capability of the buffer is based on determining that the UE is configured to operate in the dual connectivity mode. In some cases, transmitting an indication of the identified size capability of the buffer includes transmitting an indication of the second size capability and the third size capability.

[0019] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for: identifying an updated size capability of the buffer based on identifying a change in the activity state of the UE; and transmitting a second indication of the updated size capability of the buffer to a base station serving the UE.

[0020] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for identifying an activity state change of at least one of a set of subscriber identification modules of the UE, side link communications, a location of the UE, or a combination thereof, wherein the updated size capacity of the buffer is identified based on identifying the activity state change.

[0021] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for: periodically measuring one or more parameters associated with the UE; identifying an updated size capability of the buffer based on periodic measurement of the one or more parameters; and transmitting a second indication of the updated size capability of the buffer to a base station serving the UE.

[0022] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the indication of the identified size capability may be a first multiplier, and the second indication of the updated size capability may be a second multiplier different from the first multiplier. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the size capability may be preconfigured at the UE.

[0023] In some examples of the methods, devices (apparatus), and non-transient computer-readable media described herein, the buffer may be a layer 2 buffer, and the protocol layer may be a layer 2 protocol layer. In some examples of the methods, devices (apparatus), and non-transient computer-readable media described herein, the protocol layer may be above the physical layer and below the radio resource control layer.

[0024] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the protocol layer may be associated with one or more of a packet data convergence control layer, a radio link control (RLC) layer, or a MAC layer. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the buffer may be associated with a transmit operation, a receive operation, or a combination thereof.

[0025] A method of wireless communication at a network node is described. The method may include: receiving an indication of a size capability of a buffer associated with a protocol layer of the UE from a UE; determining a size capability of the buffer of the UE based on the received indication; determining a resource schedule to be used to transmit data to the UE based on the determined size capability of the buffer; and communicating data with the UE according to the determined schedule.

[0026] An apparatus for wireless communication at a network node is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: receive an indication of a size capability of a buffer associated with a protocol layer of the UE from a UE; determine the size capability of the buffer of the UE based on the received indication; determine a resource schedule to be used to transmit data to the UE based on the determined size capability of the buffer; and communicate data with the UE according to the determined schedule.

[0027] Another apparatus for wireless communication at a network node is described. The apparatus may include means for: receiving an indication of a size capability of a buffer associated with a protocol layer of the UE from a UE; determining a size capability of the buffer of the UE based on the received indication; determining a resource schedule to be used to transmit data to the UE based on the determined size capability of the buffer; and communicating data with the UE according to the determined schedule.

[0028] A non-transitory computer-readable medium storing code for wireless communication at a network node is described. The code may include instructions executable by a processor for: receiving an indication of a size capability of a buffer associated with a protocol layer of the UE from a UE; determining a size capability of the buffer of the UE based on the received indication; determining a resource schedule to be used to transmit data to the UE based on the determined size capability of the buffer; and communicating data with the UE according to the determined schedule.

[0029] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the communication may include operations, features, devices, or instructions for the following actions: transmitting downlink data scheduled based on the received indication to the UE. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the communication may include operations, features, devices, or instructions for the following actions: transmitting scheduling information for uplink data performed by the UE to the UE based on the received indication; and receiving uplink data from the UE according to the transmitted scheduling information.

[0030] In some examples of the methods, devices, and non-transitory computer-readable media described herein, determining the size capability may include operations, features, devices, or instructions for the following actions: determining the size capability of the buffer based on a received indication, a size of unacknowledged data for uplink communications, estimating the size of a reordering buffer for downlink communications based on a state of at least one RLC, or a combination thereof.

[0031] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, transmitting an indication of the size capability may include operations, features, means, or instructions for the following actions: receiving an indication of the size capability from the UE in a UE capability report in radio resource control signaling. Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: transmitting the UE capability report.

[0032] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, transmitting an indication of the size capability may include operations, features, means, or instructions for the following actions: receiving an indication of the size capability from the UE in a MAC control element. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the indication of the size capability of the buffer may be based on the UE operating in a dual connectivity mode.

[0033] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the dual connectivity mode includes at least one of a multi-radio dual connectivity mode, a new radio dual connectivity mode, an LTE dual connectivity mode, or a combination thereof. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the indication of the size capability of the buffer may be based on the UE operating in a standalone mode.

[0034] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: receiving from the UE a second indication of a second size capability of the buffer and a third indication of a third size capability of the buffer, wherein the second size capability of the buffer is based on the UE operating in a standalone mode and the third size capability of the buffer is based on the UE operating in a dual connectivity mode; and determining the second size capability of the buffer based on the second indication and determining the third size capability of the buffer based on the third indication, wherein receiving the indication of the size capability of the buffer includes receiving the second indication and the third indication.

[0035] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for: receiving a second indication of an updated size capability of the buffer from the UE, wherein the second indication of the updated size capability of the buffer may be based on periodic measurements of one or more parameters at the UE; and determining an updated size capability of the buffer based on the second indication.

[0036] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the indication of the identified size capability may be a first multiplier, and the second indication of the updated size capability may be a second multiplier different from the first multiplier. Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: receiving a second indication of the updated size capability of the buffer from the UE, wherein the second indication of the updated size capability of the buffer may be based on a change in the activity state of a set of subscriber identification modules of the UE; and determining the updated size capability of the buffer based on the second indication.

[0037] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for: receiving from the UE an indication of a preference to the UE associated with allocating the buffer between downlink communications and uplink communications; and scheduling the downlink communications and the uplink communications based at least in part on the indication of the preference to the UE associated with allocating the buffer.

[0038] In some examples of the methods, devices (apparatus), and non-transient computer-readable media described herein, the size capability may be preconfigured at the UE. In some examples of the methods, devices (apparatus), and non-transient computer-readable media described herein, the buffer may be a layer 2 buffer, and the protocol layer may be a layer 2 protocol layer.

[0039] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the protocol layer may be above the physical layer and below the radio resource control layer. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the protocol layer may be associated with one or more of a packet data convergence control layer, or a radio link control layer, or a MAC layer. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the buffer may be associated with a transmit operation, or a receive operation, or both. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1

[0013] An example of a wireless communication system supporting signaling buffer size capability in accordance with aspects of the present disclosure is illustrated.

[0042] Figure 2

[0013] An example of a wireless communication system supporting signaling buffer size capability in accordance with aspects of the present disclosure is illustrated.

[0043] Figure 3 An example of a process flow that supports signaling a buffer size capability in accordance with aspects of the present disclosure is illustrated.

[0044] Figure 4 An example of a process flow that supports signaling a buffer size capability in accordance with aspects of the present disclosure is illustrated.

[0045] Figure 5 and 6 A block diagram of a device supporting signaling buffer size capability in accordance with aspects of the present disclosure is shown.

[0046] Figure 7 A block diagram of a communications manager supporting signaling buffer size capability in accordance with aspects of the present disclosure is shown.

[0047] Figure 8 A diagram of a system including a device supporting signaling buffer size capability is shown in accordance with aspects of the present disclosure.

[0048] Fig. 9 and 10 A block diagram of a device supporting signaling buffer size capability in accordance with aspects of the present disclosure is shown.

[0049] Fig.11 A block diagram of a communications manager supporting signaling buffer size capability in accordance with aspects of the present disclosure is shown.

[0050] Fig.12 A diagram of a system including a device supporting signaling buffer size capability is shown in accordance with aspects of the present disclosure.

[0051] Figures 13 to 16 A flow chart illustrating a method of supporting signaling buffer size capability in accordance with aspects of the present disclosure is shown.

[0052] Detailed Description

[0053] Some wireless communication systems may include communication devices that can support multiple radio access technologies, such as user equipment (UE) and base stations (e.g., evolved B nodes (eNBs), next generation B nodes, or gigabit B nodes (any of which may be referred to as gNBs)). Examples of radio access technologies include 4G systems (such as long term evolution (LTE) systems) and fifth generation (5G) systems (which may be referred to as new radio (NR) systems). In some examples, the communication device may support one or more of the above example radio access technologies based on operating in a dual connectivity mode. This mode may thereby allow the communication device to simultaneously transmit and receive information (e.g., in the form of packets) from at least two cell groups on multiple component carriers via a primary base station (e.g., primary eNB (MeNB), primary gNB (MgNB)) and a secondary base station (e.g., secondary eNB (SeNB), secondary gNB (SgNB)). Component carriers may be configured in primary cells and secondary cells. In some examples, the primary base station may correspond to the primary cell, and the secondary base station may correspond to the secondary cell.

[0054] In some examples, the primary cell may correspond to one radio access technology and the secondary cell may correspond to another radio access technology. For example, the primary cell may correspond to LTE and the secondary cell may correspond to NR. Alternatively, the primary cell may correspond to NR and the secondary cell may correspond to LTE. In some examples, the primary cell may include one component carrier in time division duplex (TDD) mode, or one downlink component carrier and one uplink component carrier in frequency division duplex (FDD) mode. Similarly, in some examples, each secondary cell may include one component carrier in TDD mode or one downlink component carrier and an optional uplink component carrier in FDD mode. The communication device may communicate with one or more of the primary cell or the secondary cell on one or more of the configured component carriers.

[0055] In some examples, a communication device may support one or more methods for managing the use of a second layer buffer. Specifically, the UE may signal an indication of the size capability to the base station. According to one or more aspects, a UE may identify the size capability of a buffer associated with a protocol layer of the UE. For example, the UE may identify the buffer length associated with the protocol layer of the UE (e.g., the size of the amount of buffered data of the protocol layer) that it supports. In some examples, the UE may determine the size capability as the size of the buffer in which the UE stores packets for second layer operations (such as transmission or reception operations) as a function of the physical layer data rate. In some aspects, the buffer size may be defined as the sum of the number of bytes that the UE can store in the transmission and reception windows for multiple radio bearers. In one example, the size capability may be preconfigured at the UE. In some cases, the buffer may be a second layer buffer, and the protocol layer may be a second layer protocol layer, wherein the protocol layer is above the physical layer and below the radio resource control layer. In some examples, the protocol layer may be associated with one or more of a packet data convergence control layer, a radio link control (RLC) layer, or a media access control (MAC) layer. The second layer buffer may be associated with a transmit operation, a receive operation, or a combination thereof. Upon determining the size capability, the UE may report an indication of the size capability to the base station. For example, the UE may report the size capability as one or more parameters in a UE capability report. The UE may then communicate with the base station data scheduled based on the transmitted indication.

[0056] Certain aspects of the subject matter described in this disclosure may be implemented to achieve one or more of the following potential advantages. Techniques employed by the described one or more communication devices may provide benefits and enhancements to the operation of the communication device. For example, when operating in a dual connectivity mode, operations performed by the described one or more communication devices may provide improvements to power consumption. In some examples, signaling buffer size capabilities may support improvements to spectral efficiency, higher data rates, and in some examples may promote enhanced efficiency for high reliability and low latency communication operations, and other benefits.

[0057] Aspects of the disclosure are initially described in the context of wireless communication systems and process flows. Aspects of the disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow diagrams related to signaling buffer size capabilities.

[0058] Figure 1 An example of a wireless communication system 100 supporting signaling buffer size capability according to aspects of the present disclosure is illustrated. 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 an LTE network, an LTE-A network, an LTE-A Pro network, or an NR network. In some examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0059] The base stations 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may be different forms of devices or devices with different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base stations 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area over which the base stations 105 and the UEs 115 may support signal communication according to one or more radio access technologies.

[0060] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be different forms of devices or devices with different capabilities. Figure 1Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), such as Figure 1 as shown in .

[0061] Each base station 105 may communicate with the core network 130, or communicate with each other, or both. For example, the base station 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105), or indirectly (e.g., via the core network 130), or directly and indirectly on the backhaul link 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul link 120 may be or include one or more wireless links.

[0062] One or more of the base stations 105 described herein may include or may be referred to by a person of ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a B node, an evolved B node (eNB), a next generation B node or a gigabit B node (any of which may be referred to as a gNB), a home B node, a home evolved B node, or other suitable terminology.

[0063] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects such as electrical appliances or vehicles, meters, etc.

[0064] The UE 115 described herein may be able to communicate with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 as shown in .

[0065] The UE 115 and the base station 105 may communicate wirelessly with each other via one or more communication links 125 on one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. The UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0066] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or DFT-S-OFDM). In a system using MCM technology, a resource element may include a code element period (e.g., the duration of a modulation code element) and a subcarrier, where the code element period and the 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 decoding rate of the modulation scheme, or both). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of 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 can further improve the data rate or data integrity of communication with UE 115.

[0067] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, and the basic time unit can be, for example, a sampling period T s =1 / (Δf max N f ) seconds, where Δf max It can represent the maximum supported subcarrier spacing, and N f The maximum supported discrete Fourier transform (DFT) size may be indicated. 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).

[0068] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of code element periods (e.g., depending on the length of the cyclic prefix added before each code element period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-time slots containing one or more code elements. Excluding the cyclic prefix, each code element 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 band.

[0069] 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 bursts of shortened TTIs (sTTIs)).

[0070] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across a system bandwidth or a subset of a system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0071] In some examples, base stations 105 may be mobile and thus provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0072] The wireless communication system 100 may be configured to support ultra-reliable communication or low latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low latency communication (URLLC) or mission-critical communication. UE 115 may be designed to support ultra-reliable, low latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private communication or group communication, and may be supported by one or more mission-critical services (such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions may include prioritization of services, and mission-critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low latency, critical mission, and ultra-reliable low latency may be used interchangeably herein.

[0073] In some examples, UE 115 may also be able to communicate directly with other UE 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 may be within a geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105, or may not be able to receive transmissions from the base station 105 for other reasons. In some examples, each group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, wherein 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 D2D communication. In other cases, D2D communication is performed between each UE 115 without involving the base station 105.

[0074] 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), and the EPC or 5GC may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by a base station 105 associated with the core network 130. User IP packets may be delivered via a user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to a network operator IP service 150. Operator IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0075] Some network devices (such as 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 each UE 115 through one or more other access network transport entities 145, which may be referred to as radio heads, smart radio heads, or transmission / reception 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 merged into a single network device (e.g., base station 105).

[0076] The wireless communication system 100 may operate using one or more frequency bands in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). In some examples, the 300 MHz to 3 GHz region is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from about 1 decimeter to 1 meter long. UHF waves may be blocked or redirected by buildings and environmental features, but these waves may penetrate various structures sufficiently for macro cells to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0077] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ licensed 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) may employ carrier sensing for conflict detection and avoidance. In some examples, operations in an unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in a licensed band. Operations in an unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others.

[0078] The base station 105 or UE 115 may be equipped with multiple antennas, which can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located in one or more antenna arrays or antenna panels that can 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 antenna ports of several rows and columns that the base station 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0079] The base station 105 or UE 115 can use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such technology may be referred to as spatial multiplexing. For example, the transmitting device may transmit multiple signals via different antennas or different antenna combinations. Similarly, the receiving device may receive multiple signals via different antennas or different antenna combinations. 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 technology includes single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device; and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0080] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated 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 communicated via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0081] The base station 105 or the UE 115 may use beam sweeping techniques as part of a beamforming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the base station 105 in different directions. For example, the base station 105 may transmit signals according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by a transmitting device (such as the base station 105) or a receiving device (such as the UE 115)) to identify a beam direction used by the base station 105 for later transmission or reception.

[0082] Some signals, such as data signals associated with a particular recipient device, may be transmitted by base station 105 in a single beam direction, e.g., a direction associated with a recipient device, such as UE 115. In some examples, a beam direction associated with transmissions along a 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 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 with the highest signal quality or other acceptable signal quality.

[0083] In some examples, transmission 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 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 transmit a reference signal that may be precoded or uncoded (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)). The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques to transmit signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0084] A receiving device (e.g., UE 115) may try multiple reception configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a base station 105. For example, the receiving device may try multiple reception directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different reception configurations or reception directions. In some examples, the receiving device may use a single reception configuration to receive along a single beam direction (e.g., when receiving a data signal). The single reception configuration may be aligned on a beam direction determined based on listening according to different reception configuration directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0085] The wireless communication system 100 can be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication of the bearer or packet data convergence protocol (PDCP) layer can be IP-based. The RLC layer can perform packet segmentation and reassembly to communicate on the logical channel. The MAC layer can perform priority handling and multiplex logical channels into transport channels. The MAC layer can also use error detection technology, error correction technology, or both to support retransmission of the MAC layer to improve link efficiency. In the control plane, the radio resource control protocol layer can provide the establishment, configuration and maintenance of the radio resource control connection of the radio bearer supporting user plane data between the UE 115 and the base station 105 or the core network 130. In the physical layer, the transport channel can be mapped to the physical channel.

[0086] In current wireless communication systems, a layer 2 buffer is described as a buffer in which a UE stores data for layer 2 transmission or reception operations. In some wireless communication systems, a network node may determine the layer 2 buffer size as a maximum size of the layer 2 buffer calculated as a function of the physical layer data rate. In some examples, such as in dual connectivity applications, it may be challenging to allocate memory in the UE for layer 2 operations. If the available memory in the UE is less than the layer 2 buffer size estimated at the network node (e.g., a base station), the UE may buffer more data than the UE is capable of. In such situations, the UE may discard packets or otherwise avoid buffer overflows, which may waste air interface resources. Thus, the base station needs to be informed of the memory available for the layer 2 buffer in the UE.

[0087] To manage layer 2 buffer usage, the UE 115 and the base station 105 may support layer 2 buffer size capability reporting to improve reliability and reduce latency in communications (e.g., on the communication link 125). The UE 115 may identify the size capability of the buffer associated with the protocol layer of the UE 115. The UE 115 may then transmit an indication of the identified size capability of the buffer to the base station 105 serving the UE 115, and communicate with the base station 105 data scheduled based on the transmitted indication.

[0088] Figure 2An example of a wireless communication system 200 that supports signaling buffer size capabilities according to various aspects of the present disclosure is illustrated. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. The wireless communication system 200 may include a base station 105-a and a UE 115-a within a geographic coverage area 110-a, and a base station 105-b and a UE 115-a within a geographic coverage area 110-b. The base station 105-a, the base station 105-b, and the UE 115-a may be examples of base stations 105 and UE 115 as described herein. In some examples, the wireless communication system 200 may support multiple radio access technologies, including 4G systems (such as LTE systems, LTE-A systems, or LTE-A Pro systems), and 5G systems (which may be referred to as NR systems or NR communication systems). In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100 to support improvements in power consumption, spectral efficiency, higher data rates, and in some examples, may promote enhanced efficiency of high reliability and low latency communication operations, and other benefits.

[0089] exist Figure 2 In an example of , UE 115-a may support one or more of the above example radio access technologies (such as LTE and NR) according to operating in dual connectivity mode. The mode may thereby allow UE 115-a to simultaneously transmit and receive information (e.g., in the form of packets) from at least two cell groups on multiple component carriers via a primary cell group (MCG) corresponding to a primary base station (e.g., MeNB, MgNB) and a secondary cell group (SCG) corresponding to a secondary base station (e.g., SeNB, SgNB). Base station 105-a may be associated with a first cell group associated with a first RAT (such as an LTE cell group). Base station 105-b may be associated with a second cell group associated with a second RAT (such as an NR cell group).

[0090] In accordance with one or more aspects of the present disclosure, UE 115-a may be configured to operate in a dual connectivity mode to communicate concurrently or simultaneously with base station 105-a and base station 105-b using aspects of the described buffer size signaling techniques. In one example, base station 105-a may be referred to as a primary base station, and base station 105-b may be referred to as a secondary base station. In some examples, base station 105-a may correspond to an MCG including a primary cell (which may correspond to coverage area 110-a), and base station 105-b may correspond to an SCG including a secondary cell (which may correspond to coverage area 110-b). In some examples, the SCG may include a primary and secondary cell and one or more secondary cells.

[0091] In some aspects, the wireless communication system 200 may support various aspects of buffer size signaling operations. The 5G system may provide a protocol stack layer, including a first layer, a second layer, and a third layer. In a 5G system (such as the wireless communication system 200), the first layer may be referred to as a physical layer, the second layer may be referred to as a protocol layer, and the third layer may be referred to as a radio resource control layer. The second layer protocol layer may be associated with one or more of a packet data convergence control layer, or an RLC layer, or a MAC layer. According to some aspects, the second layer of the NR system may be split into one or more sublayers. For example, the sublayer may include a service data adaptation protocol, PDCP, RLC, and MAC. In some cases, the protocol layer (or second layer) may be above the physical layer and below the radio resource control layer. In some examples, the MAC layer may receive one or more transport channels from the physical layer.

[0092] The MAC layer may then determine one or more logical channels based on the one or more transport channels, and the MAC layer may transmit the one or more logical channels to the RLC layer. For example, the MAC layer may determine a mapping between logical channels and transport channels, and may forward the logical channels to the RLC layer. The MAC layer may multiplex MAC service data units belonging to the same or different logical channels into transport blocks delivered to the physical layer on the transport channel or demultiplex MAC service data units from transport blocks delivered from the physical layer on the transport channel.

[0093] The RLC layer may determine one or more RLC channels and send the one or more RLC channels to the packet data convergence control layer. In some aspects, the packet data convergence control layer may determine one or more radio bearers and forward them to the service data adaptation protocol. The service data adaptation protocol may determine one or more quality of service flows based on the received radio bearers. For example, the service data adaptation protocol may map between quality of service flows and data radio bearers, marking the quality of service flow identifiers in downlink and uplink packets.

[0094] In an NR communication system, the second layer buffer size is described as the maximum size of the buffer in which the UE stores packets for second layer operations (such as transmission or reception operations), which is a function of the physical layer data rate. Specifically, the total second layer buffer size may be defined as the sum of the number of bytes that the UE can store in the RLC transmission window and the RLC reception and reordering window and the number of bytes that the UE can store in the packet data convergence control reordering window for all radio bearers. That is, in some communication systems, the buffer size for the second layer operation is defined as a function of the supported physical layer data rate. In some examples, the second layer buffer may be used for downlink and uplink operations. In the example of uplink operation, the second layer buffer may be used to store RLC / packet data convergence control service data units until they are acknowledged by the network. That is, in uplink operation, the second layer buffer may be used to store RLC / packet data convergence control service data units for use during retransmission. According to some aspects, the total layer 2 buffer size in dual connectivity mode may be determined as the maximum of values ​​calculated based on the following equations ((1) and (2)) (such as the equation described in the Third Generation Partnership Project (3GPP) Technical Specification 38.306):

[0095] [Maximum UL data rate_MN*RLCRTT_MN+Maximum UL data rate_SN*RLCRTT_SN+Maximum DL data rate_SN*RLCRTT_SN+Maximum DL data rate_MN*(RLCRTT_SN+X2 / Xn delay+queueing in SN)]...(1)

[0096] [Maximum UL data rate_MN*RLCRTT_MN+Maximum UL data rate_SN*RLCRTT_SN+Maximum DL data rate_MN*RLCRTT_MN+Maximum DL data rate_SN*(RLCRTT_MN+X2 / Xn delay+queue in MN)]...(2)

[0097] If the UE is not operating in dual connectivity mode, the serving base station may determine the total layer 2 buffer size based on the following equation (3):

[0098] [Maximum DL data rate*RLC RTT+Maximum UL data rate*RLC RTT]...(3)

[0099] As described herein, the master node may also be referred to as an MN, and the slave node may also be referred to as an SN. In current wireless communication systems, the serving base station may determine the size of the second layer buffer for a given UE as the maximum total second layer buffer size among all buffer sizes calculated for each band combination and applicable feature set combination in the multi-radio dual connectivity or NR dual connectivity band combination supported in the combination reported by the UE in the capability message. As described herein, the RLC round trip time (RLC RTT) of the NR cell group may correspond to the minimum subcarrier spacing (SCS) parameter set supported in the band combination and applicable feature set combination. In addition, the size of the second layer buffer may be calculated based on the following values:

[0100] If SCG is NR, then X2 / Xn delay + queuing in SN = 25ms, and if SCG is E-UTRA, then X2 / Xn delay + queuing in SN = 55ms

[0101] If MCG is NR, then X2 / Xn delay + queuing in MN = 25ms, and if MCG is E-UTRA, then X2 / Xn delay + queuing in MN = 55ms

[0102] RLC RTT of E-UTRA cell cluster = 75ms

[0103] The RLC RTT for the NR cell group is defined in Table 1 below:

[0104] SCS(kHz) RLC RTT(ms) 15kHz 50 30kHz 40 60kHz 30 120kHz 20

[0105] Table 1: RLC RTT for NR cell clusters by SCS

[0106] In addition, current wireless communication systems support various UE capabilities. Some UEs with the ability to support 5G operations may include a limited amount of memory available for second-layer operations. In one example, for cost and form factor, the total memory in the UE may be limited to a stand-alone modem. In some instances, the cost of NR IoT devices may be kept low. In some other examples, the UE may have a limited amount of available memory because the memory in the UE may be shared with other memory-intensive tasks. In some other examples, the UE may be able to provide more memory than the memory indicated herein, which may provide improved performance. In some communication systems, the base station may determine the second-layer buffer size of the UE (e.g., using formulas 1, 2, and 3) without knowing the memory available at the UE. Thus, for UEs configured to operate in a 5G system, for example, in dual connectivity applications, it may be challenging to allocate memory for second-layer operations, and the UE may buffer more than the UE can buffer. In some communication systems, the UE may drop packets or otherwise take other steps to avoid buffer overflow, which may waste air interface resources. It may be necessary to notify the base station of the available memory in the UE so that scheduling is adjusted accordingly while maximizing efficiency.

[0107] One or more aspects of the present disclosure may provide for managing layer 2 buffer usage by signaling UE buffer capabilities (or UE capabilities) to a base station. According to one or more aspects, a UE 115-a may be configured to report the capabilities as one or more parameters (e.g., UE_buf_capability_DC and / or UE_buf_capability). The UE 115-a may transmit an indication 215 of the buffer size capability to the base station. The base station may then schedule data based on the transmitted capabilities to avoid overflowing the UE's buffer.

[0108] In some cases, UE 115-a may identify the size capability of the second layer buffer of the UE. In one example, the size capability is preconfigured at UE 115-a. UE 115-a may transmit an indication 215 of the identified size capability to a base station serving the UE (e.g., base station 105-a and / or base station 105-b). For example, UE 115-a may determine the second layer buffer size supported by UE 115-a, and may determine parameters (e.g., UE_buffer_capacity_DC and / or UE_buffer_capacity) based on the second layer buffer size. In some examples, UE 115-a may determine the second layer buffer size based on the operating mode of UE 115-a. For example, UE 115-a may determine the first size of the second layer buffer based on determining that UE 115-a is configured to operate in dual connectivity mode, and UE 115-a may determine the second size of the second layer buffer based on determining that UE 115-a is configured to operate in standalone mode. Accordingly, the UE 115-a may determine a first indication (e.g., UE_buffer_capability_DC) based on a first size of the second layer buffer, and the UE 115-a may determine a second indication (e.g., UE_buffer_capability) based on a second size of the second layer buffer. In some cases, the UE 115-a may transmit an indication 215 of the identified size capability in a UE capability report in radio resource control signaling. In some examples, the UE 115-a may transmit an indication of a UE preference associated with allocating buffers between downlink communications and uplink communications. For example, a UE 115-a that prefers a high-speed uplink may request or otherwise allocate a higher percentage (e.g., 80%) of buffers for uplink communications, and vice versa. That is, a UE 115-a that prefers a high-speed downlink may request or otherwise allocate a higher percentage of buffers for downlink communications. The direction with more memory may have a higher throughput. The base station 105, in conjunction with the core network, may schedule downlink or uplink data based on an estimate of the amount of UE buffers used for downlink and uplink, respectively. For example, the base station receives from the UE an indication of a UE preference associated with allocating a buffer between downlink communication and uplink communication. The base station may then schedule downlink communication and uplink communication based on an indication of a UE preference associated with allocating a buffer. Additionally or alternatively, the UE 115-a may transmit a UE capability report to the core network via a serving base station. In some cases, the UE 115-a may transmit an indication 215 of the identified size capability in a MAC control element. In one example, in the case of a dual card single pass subscription, the buffer may be "X", and in the case of a dual card dual pass (DSDA) subscription, the buffer may be "Y" because the physical memory is shared between subscriptions.

[0109] In some aspects, UE 115-a may communicate with the base station the data scheduled based on the transmitted indication 215 (e.g., UE_buffer_capability_DC and UE_buffer_capability). For example, a network node (e.g., a base station) may determine the UE's second layer buffer size based on the capabilities reported by UE 115-a. In some examples, the indicated parameters (e.g., UE_buffer_capability_DC and UE_buffer_capability) may be valued based on the following equation (4):

[0110] i*0.05, i={1,...,20,21,...,100}...(4)

[0111] According to one or more aspects of the present disclosure, the transmitted indication 215 (e.g., UE_buffer_capacity_DC and / or UE_buffer_capacity) may be a multiplier of equations (1), (2), and (3) described herein. In some examples, the multiplier may be less than or greater than 1. For example, upon receiving an indication of the size capability of the second layer buffer at UE 115-a, the base station may calculate the total second layer buffer size in the dual connectivity mode as the maximum of the values ​​calculated based on the following equations ((5) and (6)):

[0112] UE_buffer_capacity_DC*[maxUL data rate_MN*RLCRTT_MN+maxUL data rate_SN*RLCRTT_SN+maxDL data rate_SN*RLCRTT_SN+maxDL data rate_MN*(RLCRTT_SN+X2 / Xn delay+queueing in SN)]...(5)

[0113] UE_buffer_capacity_DC*[maxUL data rate_MN*RLCRTT_MN+maxUL data rate_SN*RLCRTT_SN+maxDL data rate_MN*RLCRTT_MN+maxDL data rate_SN*(RLCRTT_MN+X2 / Xn delay+queueing in MN)]...(6)

[0114] If UE 115-a determines that UE 115-a is not operating in dual connectivity mode and indicates UE_buffer_capability, the serving base station may determine the total layer 2 buffer size based on equation (7):

[0115] UE_buffer_capacity*[maximum DL data rate*RLC RTT+maximum UL data rate*RLCRTT]...(7)

[0116] As described herein, the size of the second layer buffer may be calculated based on the following values:

[0117] If SCG is NR, then X2 / Xn delay + queuing in SN = 25ms, and if SCG is E-UTRA, then X2 / Xn delay + queuing in SN = 55ms

[0118] If MCG is NR, then X2 / Xn delay + queuing in MN = 25ms, and if MCG is E-UTRA, then X2 / Xn delay + queuing in MN = 55ms

[0119] RLC RTT of E-UTRA cell cluster = 75ms

[0120] The RLC RTT for the NR cell group is defined in Table 1 described in this document.

[0121] In one example, UE 115-a may receive downlink data 210 scheduled based on transmitted indication 215. Additionally or alternatively, the base station may transmit scheduling information for uplink data transmission based on indication 215, and UE 115-a may transmit uplink data according to the received scheduling information.

[0122] According to one or more aspects, UE 115-a may identify activity state changes of multiple subscriber identification modules of UE 115-a. For example, UE 115-a may include multiple subscriber identification modules and may identify a state change of at least one of the subscriber identification modules. In such examples, UE 115-a may identify updated size capabilities (e.g., updated values ​​of parameters UE_buffer_capability_DC and / or UE_buffer_capability) based on identifying the activity state change, and may transmit a second indication of the updated size capabilities to the base station.

[0123] Additionally or alternatively, UE 115-a may periodically measure one or more parameters associated with UE 115-a (e.g., connectivity mode, number of modems, etc.). In some cases, UE 115-a may identify updated size capabilities (e.g., updated values ​​of parameters UE_buffer_capability_DC and / or UE_buffer_capability) based on identifying the periodic measurement of one or more parameters. UE 115-a may then transmit a second indication of the updated size capabilities to the base station. In some examples, the indication of the identified size capabilities may be a first multiplier, and the second indication of the updated size capabilities may be a second multiplier different from the first multiplier. In one example, the first indication may have a first value of "i" and the second indication may have a second value of "i", as depicted in equation (4). For example, UE 115-a may determine that UE 115-a can support a smaller second layer buffer size based on measuring one or more parameters. In such examples, the second indication may be associated with a smaller value of "i" and the first indication may be associated with a higher value of "i".

[0124] Figure 3 An example of a process flow 300 supporting signaling buffer size capability according to aspects of the present disclosure is illustrated. In some examples, the process flow 300 may implement a process flow 300 that refers to Figure 1 and 2 Aspects of the wireless communication systems 100 and 200 described herein. For example, the process flow 300 may be based on capability signaling from the UE 115-b to the base station 105-b to reduce power consumption and may promote low latency for wireless communication, among other benefits. The base station 105-c and the UE 115-b may be as described with reference to Figure 1 and 2 Examples of base stations 105 and UEs 115 are described.

[0125] In the following description of process flow 300, operations between base station 105-c and UE 115-b may be transmitted in an order different from the example order shown, or operations performed by base station 105-c and UE 115-b may be performed in a different order or at a different time. Some operations may also be omitted from process flow 300, and other operations may be added to process flow 300.

[0126] At 305, UE 115-b may determine an operating mode of UE 115-b. In some examples, UE 115-b may determine that UE 115-b is configured to operate in a dual connectivity mode. In some cases, the dual connectivity mode may include at least one of a multi-radio dual connectivity mode, an NR dual connectivity mode, an LTE dual connectivity mode, or a combination thereof. In an alternative example, UE 115-b may determine that UE 115-b is configured to operate in a standalone mode.

[0127] At 310, UE 115-b may identify a size capability of a buffer associated with a protocol layer of UE 115-b. In some examples, the buffer is a layer 2 buffer and the protocol layer is a layer 2 protocol layer, where the protocol layer is above the physical layer and below the radio resource control layer. In some examples, the protocol layer is associated with one or more of a packet data convergence control layer, or an RLC layer, or a MAC layer. The layer 2 buffer may be associated with a transmit operation, or a receive operation, or a combination thereof. In some cases, the size capability may be preconfigured at UE 115-b. In some cases, UE 115-b may determine the size capability based on an operating mode of UE 115-b.

[0128] At 315, UE 115-b may determine an indication of the size capability of the buffer. In one example, the indication of the size capability may be as described with reference to Figure 2The described UE capability indication (eg, parameters UE_buffer_capability_DC and / or UE_buffer_capability).

[0129] At 320, UE 115-b may transmit an indication of the identified size capability of the buffer to base station 105-c serving UE 115-b. For example, UE 115-b may transmit an indication of the identified size capability in a UE capability report in radio resource control signaling. Figure 3 , but the base station 105-c may forward the UE capability report. For example, the base station 105-c may forward the UE capability report to another node of the radio access network or the core network. Alternatively, the UE 115-b may transmit an indication of the identified size capability in a MAC control element.

[0130] At 325, the base station 105-c may determine the received indication (e.g., by using a reference Figure 2 The base station 105-c may determine the buffer size capability of the UE based on the received indication, the size of the unacknowledged data for uplink communication, an estimate of the size of the reordering buffer for downlink communication based on the state of at least one RLC, or a combination thereof.

[0131] At 330, the base station 105-c may determine a resource schedule to be used to transmit data to the UE 115-b. In some examples, the resource schedule may be based on the determined buffer size capability. At 335, the base station 105-c may transmit downlink data scheduled based on the determined indication to the UE 115-b.

[0132] Operations performed by the base station 105-c and the UE 115-b as part of the process flow 300 (but not limited to the process flow 300) may provide improvements to the second layer buffer size determination through the UE capability report transmission. In addition, operations performed by the base station 105-c and the UE 115-b as part of the process flow 300 (but not limited to the process flow 300) may provide benefits and enhancements to the operation of the UE 115-b. For example, the UE capability report transmission operations described in the process flow 300 may support reduced power consumption, improved efficiency, and other advantages.

[0133] Figure 4 An example of a process flow 400 that supports signaling buffer size capability according to aspects of the present disclosure is illustrated. In some examples, the process flow 400 may implement a process flow that refers to Figure 1 and 2The process flow 400 may be based on a capability signaling procedure between the UE 115-c and the base station 105-d. The process flow 400 may be implemented by the UE 115-c and the base station 105-d to reduce power consumption and may promote low latency of wireless communication, among other benefits. The base station 105-d and the UE 115-c may be as described with reference to Figure 1 and 2 Examples of base stations 105 and UEs 115 are described.

[0134] In the following description of process flow 400, operations between base station 105-d and UE 115-c may be transmitted in an order different from the example order shown, or operations performed by base station 105-d and UE 115-c may be performed in a different order or at a different time. Some operations may also be omitted from process flow 400, and other operations may be added to process flow 400.

[0135] At 405, UE 115-c may determine an operating mode of UE 115-c. In some examples, UE 115-c may determine that UE 115-c is configured to operate in dual connectivity mode. Alternatively, UE 115-c may determine that UE 115-c is configured to operate in standalone mode.

[0136] At 410, the UE 115-c may identify a size capability of a buffer associated with a protocol layer of the UE 115-c. In some examples, the buffer is a layer 2 buffer and the protocol layer is a layer 2 protocol layer, where the protocol layer is above the physical layer and below the radio resource control layer. In some cases, the size capability may be preconfigured at the UE 115-c. In some cases, the UE 115-c may determine the size capability based on an operating mode of the UE 115-c.

[0137] At 415, the UE 115-c may transmit an indication of the identified size capability of the buffer (e.g., including an indication of parameters UE_buffer_capability_DC and / or UE_buffer_capability) to the base station 105-d serving the UE 115-c. For example, the UE 115-c may transmit the indication of the identified size capability in a UE capability report in radio resource control signaling. In some examples, the UE 115-c may transmit the indication of the identified size capability in a MAC control element.

[0138] At 420, the base station 105-d may determine the received indication based on the received indication (e.g., by using a reference Figure 2The described equations (5), (6), and (7)) determine the buffer size capability of UE 115-c. At 425, base station 105-d may determine a resource schedule to be used to transmit data to UE 115-c. In some examples, the resource schedule may be based on the determined buffer size capability.

[0139] At 430, the base station 105-d may transmit scheduling information for uplink data transmission to the UE 115-c based on the indication transmitted by the UE 115-c. At 435, the UE 115-c may transmit the uplink data in accordance with the received scheduling information.

[0140] At 440, the UE 115-c may determine one or more parameters. For example, the UE 115-c may identify a change in the activity state of a set of user identification modules of the UE 115-c. At 445, the UE 115-c may identify an updated size capability of the buffer based on the determination of the one or more parameters. At 450, the UE 115-c may transmit a second indication of the updated size capability of the buffer to the base station 105-d.

[0141] Operations performed by the base station 105-d and the UE 115-c as part of process flow 400 (but not limited to process flow 400) may provide improvements to layer 2 buffer size determination based on UE capability report transmission. In addition, operations performed by the base station 105-d and the UE 115-c as part of process flow 400 (but not limited to process flow 400) may provide benefits and enhancements to the operation of the UE 115-c. For example, the UE capability report transmission operations described in process flow 400 may support reduced power consumption, improved efficiency, and other advantages.

[0142] Figure 5 A block diagram 500 of a device 505 supporting signaling buffer size capability according to aspects of the present disclosure is shown. The device 505 may be an example of aspects of a UE 115 as described herein. The device 505 may include a receiver 510, a communication manager 515, and a transmitter 520. The device 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0143] Receiver 510 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 signaling buffer size capabilities, etc.). The information may be passed to other components of device 505. Receiver 510 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The receiver 510 may utilize a single antenna or a collection of antennas.

[0144] The communication manager 515 may identify a size capability of a buffer associated with a protocol layer of the UE; transmit an indication of the identified size capability of the buffer to a base station serving the UE; and communicate data scheduled based on the transmitted indication with the base station. The communication manager 515 may be an example of aspects of the communication manager 810 described herein.

[0145] The communication manager 515 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 515 or its subcomponents may be performed by a general purpose processor, a DSP, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device designed to perform the functions described in the present disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0146] The communication manager 515 or its subcomponents may be physically located at various locations, including being distributed such that portions of 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 515 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 515 or its subcomponents may 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.

[0147] The transmitter 520 may transmit signals generated by other components of the device 505. In some examples, the transmitter 520 may be co-located with the receiver 510 in a transceiver module. For example, the transmitter 520 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The transmitter 520 may utilize a single antenna or a collection of antennas.

[0148] Figure 6 A block diagram 600 of a device 605 supporting signaling buffer size capability according to aspects of the present disclosure is shown. The device 605 may be an example of aspects of the device 505 or UE 115 as described herein. The device 605 may include a receiver 610, a communication manager 615, and a transmitter 635. The device 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0149] 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 signaling buffer size capabilities, etc.). The information may be passed to other components of the device 605. The receiver 610 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The receiver 610 may utilize a single antenna or a collection of antennas.

[0150] Communications manager 615 may be an example of aspects of communications manager 515 as described herein. Communications manager 615 may include size capability component 620, indication component 625, and communications component 630. Communications manager 615 may be an example of aspects of communications manager 810 as described herein.

[0151] Size capability component 620 can identify a size capability of a buffer associated with a protocol layer of the UE. Indication component 625 can transmit an indication of the identified size capability of the buffer to a base station serving the UE. Communication component 630 can communicate data scheduled based on the transmitted indication with the base station.

[0152] The transmitter 635 can transmit signals generated by other components of the device 605. In some examples, the transmitter 635 can be co-located with the receiver 610 in a transceiver module. For example, the transmitter 635 can be a reference Figure 8 Examples of aspects of the described transceiver 820. The transmitter 635 may utilize a single antenna or a collection of antennas.

[0153] Figure 7 A block diagram 700 of a communication manager 705 supporting signaling of buffer size capabilities in accordance with aspects of the present disclosure is shown. The communication manager 705 can be an example of aspects of the communication manager 515, the communication manager 615, or the communication manager 810 described herein. The communication manager 705 can include a size capability component 710, an indication component 715, a communication component 720, an operating mode component 725, an activity state component 730, and a measurement component 735. Each of these modules can communicate directly or indirectly with each other (e.g., via one or more buses).

[0154] The size capability component 710 may identify the size capability of a buffer associated with a protocol layer of the UE. In some cases, the size capability is preconfigured at the UE. In some cases, the buffer is a layer 2 buffer and the protocol layer is a layer 2 protocol layer. In some cases, the protocol layer is above the physical layer and below the radio resource control layer. In some cases, the protocol layer is associated with one or more of a packet data convergence control layer, or an RLC layer, or a MAC layer. In some cases, the buffer is associated with a transmit operation, or a receive operation, or a combination thereof.

[0155] Indicating component 715 can transmit an indication of the identified size capability of the buffer to a base station serving the UE.Communicating component 720 can communicate data scheduled based on the transmitted indication with the base station.

[0156] In some examples, the communication component 720 may receive from the base station downlink data scheduled based on the transmitted indication. In some examples, the communication component 720 may receive from the base station scheduling information for uplink data scheduled based on the transmitted indication. In some examples, the communication component 720 may transmit the uplink data to the base station according to the received scheduling information.

[0157] In some examples, indicating component 715 may transmit an indication of the identified size capabilities in a UE capability report in radio resource control signaling. In some examples, indicating component 715 may transmit the UE capability report to the base station. In some examples, indicating component 715 may transmit an indication of the identified size capabilities in a MAC control element to a base station serving the UE.

[0158] The operating mode component 725 can determine that the UE is configured to operate in a dual connectivity mode, wherein identifying the size capability of the buffer is based on determining that the UE is configured to operate in a dual connectivity mode. In some cases, the dual connectivity mode includes at least one of a multi-radio dual connectivity mode, an NR dual connectivity mode, an LTE dual connectivity mode, or a combination thereof.

[0159] In some examples, the operating mode component 725 can determine that the UE is configured to operate in at least one of a standalone mode or a dual connectivity mode, wherein the second size capability of the buffer is based on determining that the UE is configured to operate in the standalone mode, and the third size capability of the buffer is based on determining that the UE is configured to operate in the dual connectivity mode. In some examples, transmitting an indication of the identified size capability of the buffer includes transmitting an indication of the second size capability and the third size capability.

[0160] In some examples, the operating mode component 725 can determine that the UE is configured to operate in a standalone mode. In some examples, the size capability component 710 can identify a second size capability of the buffer based on determining that the UE is configured to operate in a standalone mode. In some examples, the indication component 715 can transmit a second indication of the second size capability of the buffer to a base station serving the UE.

[0161] The activity state component 730 may identify an activity state change of a set of subscriber identification modules of the UE. In some examples, the activity state component 730 may identify an activity state change of at least one of a set of subscriber identification modules of the UE, side link communications, a location of the UE, or a combination thereof, and the updated size capability of the buffer is identified based on identifying the activity state change. In some examples, the size capability component 710 may identify an updated size capability of the buffer based on identifying the activity state change. In some examples, the indication component 715 may transmit a second indication of the updated size capability of the buffer to a base station serving the UE.

[0162] The measuring component 735 may periodically measure one or more parameters associated with the UE. In some examples, the size capability component 710 may identify an updated size capability of the buffer based on periodically measuring the one or more parameters. In some examples, the indicating component 715 may transmit a second indication of the updated size capability of the buffer to a base station serving the UE. In some cases, the indication of the identified size capability is a first multiplier, and the second indication of the updated size capability is a second multiplier different from the first multiplier.

[0163] Figure 8 A diagram of a system 800 including a device 805 supporting signaling buffer size capability according to aspects of the present disclosure is shown. The device 805 may be an example of or include a component of a device 505, device 605, or UE 115 as described herein. The device 805 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communication manager 810, an I / O controller 815, a transceiver 820, an antenna 825, a memory 830, and a processor 840. These components may be in electronic communication via one or more buses (e.g., bus 845).

[0164] Communications manager 810 may identify a size capability of a buffer associated with a protocol layer of the UE; transmit an indication of the identified size capability of the buffer to a base station serving the UE; and communicate data scheduled based on the transmitted indication with the base station.

[0165] I / O controller 815 can manage input and output signals of device 805. I / O controller 815 can also manage peripheral devices that are not integrated into device 805. In some cases, I / O controller 815 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 815 can utilize an operating system, such as Or another known operating system. In other cases, I / O controller 815 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 815 may be implemented as part of a processor. In some cases, a user may interact with device 805 via I / O controller 815 or via hardware components controlled by I / O controller 815.

[0166] The transceiver 820 may communicate bidirectionally via one or more antennas, wired or wireless links, as described herein. For example, the transceiver 820 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 820 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from the antenna. In some cases, the wireless device may include a single antenna 825. However, in some cases, the device may have more than one antenna 825, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0167] The memory 830 may include RAM and ROM. The memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 830 may include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0168] The processor 840 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 840 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks that support signaling buffer size capabilities).

[0169] The code 835 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 835 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 835 may not be directly executed by the processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0170] Fig. 9 A block diagram 900 of a device 905 supporting signaling buffer size capability according to aspects of the present disclosure is shown. The device 905 may be an example of aspects of a base station 105 as described herein. The device 905 may include a receiver 910, a communication manager 915, and a transmitter 920. The device 905 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0171] The receiver 910 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 signaling buffer size capabilities, etc.). The information may be passed to other components of the device 905. The receiver 910 may be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The receiver 910 may utilize a single antenna or a collection of antennas.

[0172] The communication manager 915 may receive an indication of a size capability of a buffer associated with a protocol layer of the UE from a UE; determine a size capability of the buffer of the UE based on the received indication; determine a resource schedule to be used to transmit data to the UE based on the determined size capability of the buffer; and communicate data with the UE according to the determined schedule. The communication manager 915 may be an example of aspects of the communication manager 1210 described herein.

[0173] The communication manager 915 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 915 or its subcomponents may be performed by a general purpose processor, DSP, ASIC, FPGA or other programmable logic device designed to perform the functions described in this disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0174] The communication manager 915 or its subcomponents may be physically located at various locations, including being distributed such that portions of 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 915 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 915 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, 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).

[0175] The transmitter 920 may transmit signals generated by other components of the device 905. In some examples, the transmitter 920 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 920 may be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The transmitter 920 may utilize a single antenna or a collection of antennas.

[0176] Fig.10 A block diagram 1000 of a device 1005 supporting signaling buffer size capability according to aspects of the present disclosure is shown. The device 1005 may be an example of aspects of the device 905 or base station 105 as described herein. The device 1005 may include a receiver 1010, a communication manager 1015, and a transmitter 1040. The device 1005 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0177] The receiver 1010 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 signaling buffer size capabilities, etc.). The information may be passed to other components of the device 1005. The receiver 1010 may be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The receiver 1010 may utilize a single antenna or a collection of antennas.

[0178] The communication manager 1015 can be an example of aspects of the communication manager 915 as described herein. The communication manager 1015 can include an indication component 1020, a size capability component 1025, a schedule determination component 1030, and a communication component 1035. The communication manager 1015 can be an example of aspects of the communication manager 1210 described herein.

[0179] Indication component 1020 can receive from a UE an indication of a size capability of a buffer associated with a protocol layer of the UE. Size capability component 1025 can determine the size capability of the buffer of the UE based on the received indication. Scheduling determination component 1030 can determine a resource schedule to be used to transmit data to the UE based on the determined size capability of the buffer. Communication component 1035 can communicate data with the UE according to the determined schedule.

[0180] Transmitter 1040 can transmit signals generated by other components of device 1005. In some examples, transmitter 1040 can be co-located with receiver 1010 in a transceiver module. For example, transmitter 1040 can be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The transmitter 1040 may utilize a single antenna or a collection of antennas.

[0181] Fig.11 A block diagram 1100 of a communication manager 1105 supporting signaling of buffer size capabilities in accordance with aspects of the present disclosure is shown. The communication manager 1105 can be an example of aspects of the communication manager 915, the communication manager 1015, or the communication manager 1210 described herein. The communication manager 1105 can include an indication component 1110, a size capability component 1115, a scheduling determination component 1120, a communication component 1125, and a transmission component 1130. Each of these modules can communicate with each other directly or indirectly (e.g., via one or more buses).

[0182] The indication component 1110 may receive from the UE an indication of the size capability of a buffer associated with a protocol layer of the UE. In some cases, the buffer is a layer 2 buffer and the protocol layer is a layer 2 protocol layer. In some cases, the protocol layer is above the physical layer and below the radio resource control layer. In some cases, the protocol layer is associated with one or more of a packet data convergence control layer, or an RLC layer, or a MAC layer. In some cases, the buffer is associated with a transmit operation, or a receive operation, or both.

[0183] The size capability component 1115 can determine the size capability of the buffer of the UE based on the received indication. In some cases, the size capability is preconfigured at the UE. The scheduling determination component 1120 can determine the resource scheduling to be used to transmit data to the UE based on the determined size capability of the buffer. The communication component 1125 can communicate data with the UE according to the determined schedule.

[0184] In some examples, the communication component 1125 may transmit downlink data scheduled based on the received indication to the UE. In some examples, the communication component 1125 may transmit scheduling information for uplink data performed by the UE to the UE based on the received indication. In some examples, the communication component 1125 may receive uplink data from the UE according to the transmitted scheduling information.

[0185] In some examples, the size capability component 1115 may determine the size capability of the buffer based on a received indication, a size of unacknowledged data for uplink communications, an estimate of the size of the reordering buffer for downlink communications based on a state of at least one radio link control, or a combination thereof.

[0186] In some examples, indicating component 1110 can receive an indication of the size capability from the UE in a UE capability report in radio resource control signaling. Transmitting component 1130 can transmit the UE capability report. In some examples, indicating component 1110 can receive an indication of the size capability from the UE in a MAC control element.

[0187] In some cases, the indication of the size capability of the buffer is based on the UE operating in a dual connectivity mode. In some cases, the dual connectivity mode includes at least one of a multi-radio dual connectivity mode, a new radio dual connectivity mode, an LTE dual connectivity mode, or a combination thereof. In some cases, the indication of the size capability of the buffer is based on the UE operating in a standalone mode.

[0188] In some examples, the indication component 1110 may receive from the UE a second indication of a second size capability of the buffer and a third indication of a third size capability of the buffer, wherein the second size capability of the buffer is based on the UE operating in a standalone mode and the third size capability of the buffer is based on the UE operating in a dual connectivity mode. In some examples, the size capability component 1115 may determine the second size capability of the buffer based on the second indication and determine the third size capability of the buffer based on the third indication, wherein receiving the indication of the size capability of the buffer includes receiving the second indication and the third indication.

[0189] In some examples, indication component 1110 may receive a second indication of an updated size capability of the buffer from the UE, wherein the second indication of the updated size capability of the buffer is based on periodic measurements of one or more parameters at the UE. In some examples, size capability component 1115 may determine an updated size capability of the buffer based on the second indication. In some cases, the indication of the identified size capability is a first multiplier, and the second indication of the updated size capability is a second multiplier different from the first multiplier.

[0190] In some examples, indication component 1110 can receive a second indication of an updated size capability of the buffer from the UE, wherein the second indication of the updated size capability of the buffer is based on an activity state change of a set of subscriber identity modules of the UE. In some examples, size capability component 1115 can determine an updated size capability of the buffer based on the second indication.

[0191] Fig.12 A diagram of a system 1200 including a device 1205 supporting signaling buffer size capability according to aspects of the present disclosure is shown. The device 1205 may be an example of a device 905, a device 1005, or a base station 105 as described herein or include components of the above devices. The device 1205 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communication manager 1210, a network communication manager 1215, a transceiver 1220, an antenna 1225, a memory 1230, a processor 1240, and an inter-station communication manager 1245. These components may be in electronic communication via one or more buses (e.g., bus 1250).

[0192] The communication manager 1210 may receive an indication of a size capability of a buffer associated with a protocol layer of the UE from a UE; determine the size capability of the buffer of the UE based on the received indication; determine a resource scheduling to be used to transmit data to the UE based on the determined size capability of the buffer; and communicate data with the UE according to the determined scheduling.

[0193] The network communications manager 1215 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1215 may manage the delivery of data communications for client devices, such as one or more UEs 115.

[0194] The transceiver 1220 may communicate bidirectionally via one or more antennas, wired or wireless links, as described herein. For example, the transceiver 1220 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1220 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0195] In some cases, a wireless device may include a single antenna 1225. However, in some cases, the device may have more than one antenna 1225, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0196] The memory 1230 may include RAM, ROM, or a combination thereof. The memory 1230 may store computer readable code 1235 including instructions that, when executed by a processor (e.g., processor 1240), cause the device to perform various functions described herein. In some cases, the memory 1230 may include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0197] Processor 1240 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, processor 1240 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into processor 1240. Processor 1240 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1230) to cause device 1205 to perform various functions (e.g., functions or tasks that support signaling buffer size capabilities).

[0198] The inter-site communication manager 1245 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with UE 115 in cooperation with other base stations 105. For example, the inter-site communication manager 1245 may coordinate scheduling of transmissions to UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-site communication manager 1245 may provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0199] The code 1235 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1235 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 1235 may not be directly executed by the processor 1240, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0200] Fig.13 1 is a flow chart illustrating a method 1300 for supporting signaling buffer size capability according to aspects of the present disclosure. The operations of the method 1300 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1300 may be implemented by a UE 115 or components thereof as described herein. Figures 5 to 8In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described herein. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described herein.

[0201] At 1305, the UE may identify a size capability of a buffer associated with a protocol layer of the UE. The operations of 1305 may be performed according to the methods described herein. In some examples, aspects of the operations of 1305 may be performed as described with reference to Figures 5 to 8 The described size capability components are implemented.

[0202] At 1310, the UE may transmit an indication of the identified size capability of the buffer to a base station serving the UE. The operations of 1310 may be performed according to the methods described herein. In some examples, aspects of the operations of 1310 may be performed as described with reference to Figures 5 to 8 The described instruction components are executed.

[0203] At 1315, the UE may communicate with the base station data scheduled based on the transmitted indication. The operations of 1315 may be performed according to the methods described herein. In some examples, aspects of the operations of 1315 may be performed as described with reference to Figures 5 to 8 The described communication components are used to perform.

[0204] Fig.14 1400 for supporting signaling buffer size capability according to aspects of the present disclosure. The operations of the method 1400 may be implemented by the UE 115 or components thereof as described herein. For example, the operations of the method 1400 may be implemented by the UE 115 or components thereof as described herein. Figures 5 to 8 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described herein. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described herein.

[0205] At 1405, the UE may identify a size capability of a buffer associated with a protocol layer of the UE. The operations of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be performed as described with reference to Figures 5 to 8 The described size capability components are implemented.

[0206] At 1410, the UE may transmit an indication of the identified size capability of the buffer to a base station serving the UE. The operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed as described with reference to Figures 5 to 8 The described instruction components are executed.

[0207] At 1415, the UE may communicate with the base station data scheduled based on the transmitted indication. The operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be performed as described with reference to Figures 5 to 8 The described communication components are used to perform.

[0208] At 1420, the UE may identify an activity state change. In some examples, the UE may identify an activity state change of at least one of a set of subscriber identification modules of the UE, sidelink communications, a location of the UE, or a combination thereof. The operations of 1420 may be performed according to the methods described herein. In some examples, aspects of the operations of 1420 may be performed as described with reference to Figures 5 to 8 The described active state components are executed.

[0209] At 1425, the UE may identify the updated size capability of the buffer based on identifying the activity state change. The operations of 1425 may be performed according to the methods described herein. In some examples, aspects of the operations of 1425 may be performed as described with reference to Figures 5 to 8 The described size capability components are implemented.

[0210] At 1430, the UE may transmit a second indication of the updated size capability of the buffer to the base station serving the UE. The operations of 1430 may be performed according to the methods described herein. In some examples, aspects of the operations of 1430 may be performed as described with reference to Figures 5 to 8 The described instruction components are executed.

[0211] Fig.15 1 is a flow chart illustrating a method 1500 for supporting signaling buffer size capability according to aspects of the present disclosure. The operations of the method 1500 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 1500 may be implemented by a base station 105 or components thereof as described herein. Figures 9 to 12 In some examples, a base station may execute an instruction set to control functional elements of the base station to perform the functions described herein. Additionally or alternatively, a base station may use dedicated hardware to perform various aspects of the functions described herein.

[0212] At 1505, the base station may receive from the UE an indication of the size capability of a buffer associated with a protocol layer of the UE. The operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed as described with reference to Figures 9 to 12 The described instruction components are executed.

[0213] At 1510, the base station may determine the size capability of the buffer of the UE based on the received indication. The operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed as described with reference to Figures 9 to 12 The size capability components described are implemented.

[0214] At 1515, the base station may determine a resource schedule to be used to transmit data to the UE based on the determined size capability of the buffer. The operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be performed as described with reference to Figures 9 to 12 The described schedule determines the components to execute.

[0215] At 1520, the base station may communicate data with the UE according to the determined schedule. The operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be performed as described with reference to Figures 9 to 12 The described communication components are used to perform.

[0216] Fig.16 1 is a flow chart illustrating a method 1600 for supporting signaling buffer size capability according to aspects of the present disclosure. The operations of the method 1600 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 1600 may be implemented by a base station 105 or components thereof as described herein. Figures 9 to 12 In some examples, a base station may execute an instruction set to control functional elements of the base station to perform the functions described herein. Additionally or alternatively, a base station may use dedicated hardware to perform various aspects of the functions described herein.

[0217] At 1605, the base station may receive from the UE an indication of the size capability of a buffer associated with a protocol layer of the UE. The operations of 1605 may be performed according to the methods described herein. In some examples, aspects of the operations of 1605 may be performed as described with reference to Figures 9 to 12 The described instruction components are executed.

[0218] At 1610, the base station may determine the size capability of the buffer of the UE based on the received indication. The operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be performed as described with reference to Figures 9 to 12 The size capability components described are implemented.

[0219] At 1615, the base station may determine a resource schedule to be used to transmit data to the UE based on the determined size capability of the buffer. The operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be performed as described with reference to Figures 9 to 12The described schedule determines the components to execute.

[0220] At 1620, the base station may transmit scheduling information for uplink data performed by the UE to the UE based on the received indication. The operations of 1620 may be performed according to the methods described herein. In some examples, aspects of the operations of 1620 may be as described with reference to Figures 9 to 12 The described communication components are used to perform.

[0221] At 1625, the base station may receive uplink data from the UE according to the transmitted scheduling information. The operations of 1625 may be performed according to the methods described herein. In some examples, aspects of the operations of 1625 may be performed as described with reference to Figures 9 to 12 The described communication components are used to perform.

[0222] The following provides an overview of various aspects of the disclosure:

[0223] Aspect 1: A method for wireless communication at a UE, comprising: identifying a size capability of a buffer associated with a protocol layer of the UE; transmitting an indication of the identified size capability of the buffer to a base station serving the UE; and communicating data scheduled at least in part based on the transmitted indication with the base station.

[0224] Aspect 2: The method of aspect 1, wherein the communicating comprises: receiving downlink data scheduled based at least in part on the transmitted indication from the base station.

[0225] Aspect 3: A method as in any one of Aspects 1 to 2, wherein the communication comprises: receiving scheduling information for uplink data scheduled at least in part based on the transmitted indication from the base station; and transmitting the uplink data to the base station according to the received scheduling information.

[0226] Aspect 4: The method of any one of aspects 1-3, wherein transmitting the indication of the identified size capability comprises: transmitting the indication of the identified size capability in a UE capability report in radio resource control signaling.

[0227] Aspect 5: The method of Aspect 4, wherein the transmitting comprises: transmitting the UE capability report to the base station.

[0228] Aspect 6: The method of aspect 4, wherein the UE transmits an indication of a preference to the UE associated with allocating the buffer between downlink communications and uplink communications.

[0229] Aspect 7: A method as in any one of Aspects 1 to 5, wherein transmitting an indication of the identified size capability comprises: transmitting an indication of the identified size capability in a medium access control (MAC) control element to a base station serving the UE.

[0230] Aspect 8: The method of any one of Aspects 1 to 7, further comprising: determining that the UE is configured to operate in a dual connectivity mode, wherein identifying the size capability of the buffer is at least partially based on determining that the UE is configured to operate in a dual connectivity mode.

[0231] Aspect 9: A method as in any one of Aspects 1 to 8, further comprising: determining that the UE is configured to operate in at least one of a standalone mode or a dual connectivity mode, wherein the second size capability of the buffer is at least partially based on determining that the UE is configured to operate in a standalone mode, and the third size capability of the buffer is at least partially based on determining that the UE is configured to operate in a dual connectivity mode, wherein transmitting an indication of the identified size capability of the buffer includes: transmitting an indication of the second size capability and the third size capability.

[0232] Aspect 10: The method of any one of Aspects 1 to 9 further comprises: identifying an updated size capability of the buffer based at least in part on identifying a change in an activity state of the UE; and transmitting a second indication of the updated size capability of the buffer to a base station serving the UE.

[0233] Aspect 11: The method of Aspect 10 further includes: identifying an activity state change of at least one of multiple subscriber identification modules of the UE, side link communications, the location of the UE, or a combination thereof, wherein the updated size capacity of the buffer is identified at least in part based on identifying the activity state change.

[0234] Aspect 12: The method of any one of Aspects 1 to 11 further includes: periodically measuring one or more parameters associated with the UE; identifying an updated size capability of the buffer based at least in part on periodically measuring the one or more parameters; and transmitting a second indication of the updated size capability of the buffer to a base station serving the UE.

[0235] Aspect 13: A method for wireless communication at a network node, comprising: receiving an indication of a size capability of a buffer associated with a protocol layer of the UE from a UE; determining the size capability of the buffer of the UE based at least in part on the received indication; determining a resource scheduling to be used to transmit data to the UE based at least in part on the determined size capability of the buffer; and communicating data with the UE according to the determined scheduling.

[0236] Aspect 14: The method of aspect 13, wherein the communicating comprises: transmitting to the UE downlink data scheduled based at least in part on the received indication.

[0237] Aspect 15: A method as in any one of Aspects 13 to 14, wherein the communication comprises: transmitting scheduling information for uplink data scheduled by the UE to the UE based at least in part on the received indication; and receiving uplink data from the UE according to the transmitted scheduling information.

[0238] Aspect 16: A method as described in any one of Aspects 13 to 15, wherein determining the size capability includes: determining the size capability of the buffer based at least in part on a received indication, a size of unconfirmed data for uplink communication, an estimate of the size of a reordering buffer for downlink communication based at least in part on a state of at least one radio link control, or a combination thereof.

[0239] Aspect 17: The method of any one of aspects 13 to 16, wherein receiving the indication of the size capability comprises: receiving the indication of the size capability from the UE in a UE capability report in radio resource control signaling.

[0240] Aspect 18: The method of aspect 17, wherein receiving an indication of the size capability comprises: receiving an indication of the size capability from the UE in a medium access control (MAC) control element.

[0241] Aspect 19: The method of any one of aspects 13 to 18, wherein receiving an indication of the size capability comprises: receiving an indication of the size capability from the UE in a medium access control (MAC) control element.

[0242] Aspect 20: The method of any one of aspects 13 to 19, wherein the indication of the size capability of the buffer is based at least in part on the UE operating in dual connectivity mode.

[0243] Aspect 21: The method of any one of aspects 13 to 20, wherein the indication of the size capability of the buffer is based at least in part on the UE operating in a standalone mode.

[0244] Aspect 22: A method as in any one of Aspects 13 to 21, further comprising: receiving from the UE a second indication of a second size capability of the buffer and a third indication of a third size capability of the buffer, wherein the second size capability of the buffer is at least partially based on the UE operating in a standalone mode, and the third size capability of the buffer is at least partially based on the UE operating in a dual connectivity mode; and determining the second size capability of the buffer at least partially based on the second indication and determining the third size capability of the buffer at least partially based on the third indication, wherein receiving the indication of the size capability of the buffer comprises: receiving the second indication and the third indication.

[0245] Aspect 23: The method of any one of Aspects 13 to 22 further includes: receiving a second indication of an updated size capability of the buffer from the UE, wherein the second indication of the updated size capability of the buffer is based at least in part on periodic measurements of one or more parameters at the UE; and determining the updated size capability of the buffer based at least in part on the second indication.

[0246] Aspect 24: The method of any one of Aspects 13 to 23 further includes: receiving a second indication of an updated size capability of the buffer from the UE, wherein the second indication of the updated size capability of the buffer is based at least in part on a change in an activity state of the UE; and determining the updated size capability of the buffer based at least in part on the second indication.

[0247] Aspect 25: An apparatus for performing 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 as in any one of Aspects 1 to 12.

[0248] Aspect 26: An apparatus for wireless communication at a UE, comprising at least one device for performing the method of any one of Aspects 1 to 12.

[0249] Aspect 27: A non-transitory computer-readable medium storing a code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method of any one of aspects 1 to 12.

[0250] Aspect 28: An apparatus for wireless communication at a network node, 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 as in any one of Aspects 13 to 24.

[0251] Aspect 29: An apparatus for wireless communication at a network node, comprising at least one means for performing the method of any one of Aspects 13 to 24.

[0252] Aspect 30: A non-transitory computer-readable medium storing code for wireless communication at a network node, the code comprising instructions executable by a processor to perform the method of any one of aspects 13 to 24.

[0253] It should be noted that the methods described herein describe possible implementations, and that the various operations and steps may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0254] The technology described herein can be used in various wireless communication systems, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA) and other systems. CDMA systems can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA). CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 versions are often referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, high rate packet data (HRPD), etc. UTRA includes wideband CDMA (WCDMA) and other CDMA variants. TDMA systems can implement radio technologies such as global system for mobile communications (GSM).

[0255] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), E-UTRA, Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from an organization named "3GPP". CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The technology described herein can be used for both the systems and radio technologies mentioned herein and other systems and radio technologies. Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to applications other than LTE, LTE-A, LTE-A Pro, or NR applications.

[0256] A macro cell generally covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs with service subscriptions to a network provider. A small cell may be associated with a lower power base station (compared to a macro cell), and the small cell may operate in the same or different (e.g., licensed, unlicensed, etc.) frequency band as the macro cell. According to various examples, a small cell may include a pico cell, a femto cell, and a micro cell. A pico cell, for example, may cover a smaller geographic area and may allow unrestricted access by UEs with service subscriptions to a network provider. A femto cell may also cover a smaller geographic area (e.g., a residence) and may provide restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in the residence, etc.). An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or more (eg, two, three, four, etc.) cells and may also support communication using one or more component carriers.

[0257] The wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, each base station may have similar frame timing, and transmissions from different base stations may be roughly aligned in time. For asynchronous operation, each base station may have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0258] The information and signals described herein may be represented using any of a variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0259] The various illustrative blocks and modules described in conjunction with the disclosure herein may be implemented or executed with a general purpose processor, a DSP, an ASIC, 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 an alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0260] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Other examples and implementations fall within the scope of the present 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 any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0261] Computer-readable medium includes both non-transient computer storage medium and communication medium, and it includes any medium that facilitates computer program to transfer from one place to another place.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.As an example and not limitation, non-transient computer-readable medium can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, disk storage or other magnetic storage device, or can be used to carry or store instruction or data structure form of desired program code means and can be accessed by general or special-purpose computer or general or special-purpose processor any other non-transient medium.Similarly, any connection is also properly referred to as computer-readable medium.For example, if software is transmitted 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 the coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are just included in the definition of medium. Disk and disc as used herein include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0262] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items 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). Similarly, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an exemplary step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0263] 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 that distinguishes between similar components. If only the first reference number is used in the specification, the description may apply to any of the similar components having the same first reference number regardless of the second reference number, or other subsequent reference numbers.

[0264] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or that fall within the scope of the claims. The term "exemplary" as used herein means "used as an example, instance, or illustration" and does not mean "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0265] The description herein is provided to enable those skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the universal principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: identifying a size capability of a buffer associated with a protocol layer of the UE based on an operating mode of the UE, wherein the size capability of the buffer associated with the protocol layer of the UE is a first size capability when the UE is operating in a standalone mode and a second size capability when the UE is operating in a dual connectivity mode; transmitting an indication of the identified size capability of the buffer to a network node serving the UE; as well as Data scheduled based at least in part on the transmitted indication is communicated with the network node.

2. The method of claim 1, wherein the communicating comprises: Downlink data scheduled based at least in part on the transmitted indication is received from the network node.

3. The method of claim 1, wherein the communicating comprises: receiving, from the network node, scheduling information for uplink data scheduled based at least in part on the transmitted indication; as well as The uplink data is transmitted to the network node according to the received scheduling information.

4. The method of claim 1 , wherein transmitting an indication of the identified size capability comprises: An indication of the identified size capabilities is transmitted in a UE capability report in radio resource control signaling.

5. The method of claim 4, further comprising: An indication of a preference to the UE associated with allocating the buffer between downlink communications and uplink communications is transmitted.

6. The method of claim 4, wherein the transmitting comprises: The UE capability report is transmitted to the network node.

7. The method of claim 1 , wherein transmitting an indication of the identified size capability comprises: An indication of the identified size capability is transmitted in a medium access control (MAC) control element to the network node serving the UE.

8. The method of claim 1, further comprising: Determining that the UE is configured to operate in the dual connectivity mode, wherein identifying the size capability of the buffer is based at least in part on determining that the UE is configured to operate in the dual connectivity mode.

9. The method of claim 1, further comprising: determining that the UE is configured to operate in at least one of the standalone mode or the dual connectivity mode, wherein the first size capability of the buffer is based at least in part on determining that the UE is configured to operate in the standalone mode and the second size capability of the buffer is based at least in part on determining that the UE is configured to operate in the dual connectivity mode, wherein transmitting an indication of the identified size capability of the buffer comprises transmitting an indication of the first size capability and the second size capability.

10. The method of claim 1, further comprising: identifying an updated size capability of the buffer based at least in part on identifying a change in an activity state of the UE; as well as A second indication of an updated size capability of the buffer is transmitted to the network node serving the UE.

11. The method of claim 10, further comprising: An activity state change of at least one of a plurality of subscriber identity modules of the UE, sidelink communications, a location of the UE, or a combination thereof is identified, the updated size capability of the buffer being identified based at least in part on identifying the activity state change.

12. The method of claim 1, further comprising: periodically measuring one or more parameters associated with the UE; identifying an updated size capability of the buffer based at least in part on periodically measuring the one or more parameters; as well as A second indication of an updated size capability of the buffer is transmitted to the network node serving the UE.

13. A method for wireless communication at a network node, comprising: receiving, from a user equipment (UE), an indication of a size capability of a buffer associated with a protocol layer of the UE; determining the size capability of the buffer of the UE based at least in part on the received indication, wherein the size capability is based on an operating mode of the UE, wherein the size capability of the buffer associated with the protocol layer of the UE is a first size capability when the UE is operating in a standalone mode and a second size capability when the UE is operating in a dual connectivity mode; determining a resource schedule to be used to transmit data based at least in part on the determined size capability of the buffer; as well as The data is communicated with the UE according to the determined schedule.

14. The method of claim 13, wherein the communicating comprises: Downlink data scheduled based at least in part on the received indication is transmitted.

15. The method of claim 13, wherein the communicating comprises: transmitting scheduling information for uplink data scheduled by the UE based at least in part on the received indication; as well as The uplink data is received according to the transmitted scheduling information.

16. The method of claim 13, wherein determining the size capability comprises: The size capability of the buffer is determined based at least in part on the received indication, a size of unacknowledged data for uplink communications, an estimate of a size of a reordering buffer for downlink communications based at least in part on a state of at least one radio link control, or a combination thereof.

17. The method of claim 13, wherein receiving an indication of the size capability comprises: An indication of the size capability is received in a UE capability report in radio resource control signaling.

18. The method of claim 17, further comprising: receiving an indication of a preference for the UE associated with allocating the buffer between downlink communications and uplink communications; as well as The downlink communications and the uplink communications are scheduled based at least in part on an indication of the preference to the UE associated with allocating the buffer.

19. The method of claim 13, wherein receiving an indication of the size capability comprises: An indication of the size capability is received in a medium access control (MAC) control element.

20. The method of claim 13, wherein the indication of the size capability of the buffer is based at least in part on the UE operating in a dual connectivity mode.

21. The method of claim 13, wherein the indication of the size capability of the buffer is based at least in part on the UE operating in the standalone mode.

22. The method of claim 13, further comprising: receiving a second indication of the first size capability of the buffer and a third indication of the second size capability of the buffer, wherein the first size capability of the buffer is based at least in part on the UE operating in the standalone mode and the second size capability of the buffer is based at least in part on the UE operating in the dual connectivity mode; as well as The first size capability of the buffer is determined at least in part based on the second indication and the second size capability of the buffer is determined at least in part based on the third indication, wherein receiving the indication of the size capability of the buffer includes: receiving the second indication and the third indication.

23. The method of claim 13, further comprising: receiving a second indication of an updated size capability of the buffer, wherein the second indication of an updated size capability of the buffer is based at least in part on periodic measurements of one or more parameters at the UE; as well as An updated size capability of the buffer is determined based at least in part on the second indication.

24. The method of claim 13, further comprising: receiving a second indication of an updated size capability of the buffer, wherein the second indication of an updated size capability of the buffer is based at least in part on a change in an activity state of the UE; as well as An updated size capability of the buffer is determined based at least in part on the second indication.

25. An apparatus for wireless communication at a user equipment (UE), comprising: one or more processors; one or more memories coupled to the one or more processors; as well as Instructions, which are stored in the one or more memories and executed by the one or more processors to cause the apparatus to perform the steps of the method according to any one of claims 1-12.

26. An apparatus for wireless communication at a network node, comprising: one or more processors; one or more memories coupled to the one or more processors; as well as Instructions, which are stored in the one or more memories and executed by the one or more processors to cause the apparatus to perform the steps of the method according to any one of claims 13-24.

27. An apparatus for wireless communication at a user equipment (UE), comprising: Apparatus for performing the steps of the method according to any one of claims 1-12.

28. An apparatus for wireless communication at a network node, comprising: Apparatus for performing the steps of the method as claimed in any one of claims 13-24.

29. A non-transitory computer readable medium having program code recorded thereon, wherein the program code, when executed by a processor, causes the processor to perform the steps of the method of any one of claims 1-12.

30. A non-transitory computer readable medium having program code recorded thereon, wherein the program code, when executed by a processor, causes the processor to perform the steps of the method of any one of claims 13-24.

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