BSR based on traffic estimation

Abstract

A UE may obtain an estimate of a second SDU based on at least one first SDU having a first time of arrival at a modem of the UE, the estimate of the second SDU including a second time of arrival at the modem of the UE, the second time of arrival being subsequent to the first time of arrival; and initiating a transmission of a second BSR for the second SDU based on the estimation of the second SDU. The network node may receive, from the UE, at least one BSR indicating at least one target PUSCH, transmit at least one uplink grant for the at least one target PUSCH based on the at least one BSR indicating the at least one target PUSCH, and receive the second SDU in the at least one target PUSCH.

Description

Technical Field

[0001] The present disclosure relates generally to communication systems and, more particularly, to a method of wireless communication including buffer status reporting (BSR) based on traffic estimation. Background Art

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0003] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at city, country, region, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Certain aspects of 5G NR may be based on 4G Long Term Evolution (LTE) standards. It is necessary to further improve 5G NR technology. In addition, these improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0004] The following presents a summary of one or more aspects in order to provide a basic understanding of these aspects. This summary is not an extensive review of all envisioned aspects. This summary is neither intended to identify the key or important elements of all aspects, nor to describe the scope of any or all aspects. Its only purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description presented later.

[0005] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may include a user equipment, and the user equipment (UE) may obtain an estimate of a second SDU based on at least one first service data unit (SDU) having a first arrival time at a modem of the UE, the estimate of the second SDU including a second arrival time at the modem of the UE, the second arrival time being after the first arrival time; and initiate sending a second buffer status report (BSR) of the second SDU based on the estimate of the second SDU.

[0006] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus may include a network node configured to: receive at least one BSR indicating at least one target PUSCH from a UE, the at least one BSR including a second BSR based on an estimate of a second SDU, the estimate of the second SDU including a second arrival time of the second SDU at a modem of the UE, the estimate of the second SDU based on at least one first SDU having a first arrival time at the modem of the UE, the second arrival time being after the first arrival time; send at least one uplink grant of the at least one target PUSCH based on the at least one BSR indicating the at least one target PUSCH; and receive the second SDU in the at least one target PUSCH.

[0007] To achieve the aforementioned and related purposes, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain exemplary features of one or more aspects. However, these features are only indicative of only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0009] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0010] Figure 2B is a diagram illustrating an example of DL channels within a subframe according to various aspects of the present disclosure.

[0011] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0012] Figure 2D is a diagram illustrating an example of UL channels within a subframe according to various aspects of the present disclosure.

[0013] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0014] Figure 4 is an illustration of a method of wireless communication including buffer status reporting (BSR).

[0015] Figure 5 is a diagram of a method of wireless communication including a BSR.

[0016] Figure 6 is a diagram of a method of wireless communication including a BSR.

[0017] Figure 7 is a diagram of a method of wireless communication including a BSR.

[0018] Figure 8 is a diagram of a method of wireless communication including a BSR.

[0019] Fig. 9 is a diagram of a method of wireless communication including a BSR.

[0020] Fig.10 is a diagram of a method of wireless communication including a BSR.

[0021] Fig.11 is a diagram of a method of wireless communication including a BSR.

[0022] Fig.12 is a diagram of a method of wireless communication including a BSR.

[0023] Fig.13 is a diagram of a method of wireless communication including a BSR.

[0024] Fig.14 is a call flow diagram of a method of wireless communication.

[0025] Fig.15 is a flow chart of a method of wireless communication.

[0026] Fig.16 is a flow chart of a method of wireless communication.

[0027] Fig.17 is a flow chart of a method of wireless communication.

[0028] Fig.18 is a flow chart of a method of wireless communication.

[0029] Fig.19 are diagrams illustrating examples of hardware implementations for example apparatuses and / or network entities.

[0030] Fig. 20is a diagram illustrating an example of a hardware implementation for an example network entity. DETAILED DESCRIPTION

[0031] The user equipment may include at least one application and a modem. A service data unit (SDU) from the at least one application may arrive at an empty buffer of the modem, and the UE may initiate the sending of a buffer status report (BSR). To send the BSR, the UE may transmit a scheduling request (SR), receive an UL grant, and send the BSR. Based on some aspects of the present disclosure, in order to reduce signaling overhead and reduce latency, the UE may estimate or predict the arrival time and size of future SDUs.

[0032] The detailed description set forth below in conjunction with the accompanying drawings is a description of various configurations and does not represent the only configurations with which the concepts described herein can be practiced. In order to provide a thorough understanding of the various concepts, the specific embodiments include specific details. However, these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0033] Several aspects of the telecommunication system are also presented with reference to various apparatuses and methods. These apparatuses and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0034] As an example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system", which includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gate logic components, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout the present disclosure. One or more processors in a processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, processes, functions, or any combination thereof.

[0035] Therefore, in one or more example aspects, specific implementations and / or use cases, the described functions may be implemented with hardware, software, or any combination thereof. If implemented with software, the functions may be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. By way of example, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of these types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0036] Although various aspects, specific implementations and / or use cases are described in this application by the illustration of some examples, additional or different aspects, specific implementations and use cases may be generated in many different arrangements and scenarios. The various aspects, specific implementations and / or use cases described herein can be implemented across many different platform types, devices, systems, shapes, sizes and packaging arrangements. For example, aspects, specific implementations and / or use cases can be generated via integrated chip specific implementations and other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / purchase equipment, medical equipment, artificial intelligence (AI) enabled devices, etc.). Although some examples may be specifically for use cases or applications, or may not be specifically for use cases or applications, the described examples may have a wide range of applicability. Aspects, specific implementations and / or use cases may be in the range from chip-level or modular components to non-modular, non-chip-level specific implementations, and further to the range of aggregated, distributed or original equipment manufacturer (OEM) devices or systems in conjunction with one or more technologies herein. In some practical environments, the equipment in conjunction with the various aspects and features described may also include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / accumulators, etc.) The various techniques described herein can be practiced in a wide variety of devices of various sizes, shapes, and configurations, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc.

[0037] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element or a network equipment (such as a base station (BS), or one or more units (or one or more components) that perform base station functionality can be implemented in an aggregated architecture or a decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmit receive point (TRP) or a cell, etc.) can be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0038] A converged base station may be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A decomposed base station may be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may be implemented as a virtual unit, i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0039] Base station operation or network design may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configuration such as that initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. Individual units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0040] Figure 11 is a diagram 100 illustrating an example of a wireless communication system and an access network. The illustrated wireless communication system includes a disaggregated base station architecture. The disaggregated base station architecture may include one or more CUs 110 that may communicate directly with a core network 120 via a backhaul link, or indirectly with the core network 120 through one or more disaggregated base station units, such as a near real-time (near RT) RAN intelligent controller (RIC) 125 via an E2 link, or a non-real-time (non-RT) RIC 115 associated with a service management and orchestration (SMO) framework 105, or both. The CU 110 may communicate with one or more DUs 130 via corresponding midhaul links, such as an F1 interface. The DU 130 may communicate with one or more RUs 140 via corresponding fronthaul links. The RU 140 may communicate with corresponding UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served simultaneously by multiple RUs 140.

[0041] Each of the units (i.e., CU 110, DU 130, RU 140, and near-RT RIC 125, non-RT RIC 115, and SMO framework 105) may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of these units or an associated processor or controller that provides instructions to the communication interface of these units may be configured to communicate with one or more of the other units via a transmission medium. For example, these units may include a wired interface configured to receive or send signals to one or more of the other units on a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, transmitter, or transceiver (such as an RF transceiver) configured to receive or send signals, or both, to one or more of the other units on a wireless transmission medium.

[0042] In some aspects, CU 110 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 110. CU 110 may be configured to handle user plane functionality (i.e., central unit-user plane (CU-UP)), control plane functionality (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 110 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 110 may be implemented to communicate with DU 130 for network control and signaling.

[0043] DU 130 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 140. In some aspects, DU 130 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) depending at least in part on a functional split such as that defined by 3GPP. In some aspects, DU 130 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 130 or with control functions hosted by CU 110.

[0044] The lower layer functionality may be implemented by one or more RUs 140. In some deployments, the RU 140 controlled by the DU 130 may correspond to a logical node that hosts RF processing functions or low PHY layer functions (such as performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.), or both, based at least in part on functional splitting (such as lower layer functional splitting). In such an architecture, the RU 140 may be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 140 may be controlled by the corresponding DU 130. In some scenarios, this configuration may enable the implementation of the DU 130 and the CU 110 in a cloud-based RAN architecture (such as a vRAN architecture).

[0045] The SMO framework 105 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 105 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 105 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 190) to perform network element lifecycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 110, DU 130, RU 140, and near-RT RIC 125. In some specific implementations, the SMO framework 105 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 111) via the O1 interface. Additionally, in some specific implementations, the SMO framework 105 may communicate directly with one or more RUs 140 via the O1 interface. The SMO framework 105 may also include a non-RT RIC 115 configured to support the functionality of the SMO framework 105 .

[0046] The non-RT RIC 115 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence (AI) / machine learning (ML) (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 125. The non-RT RIC 115 may be coupled to or communicate with the near-RT RIC 125 (such as via an A1 interface). The near-RT RIC 125 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 110, one or more DUs 130, or both, and the O-eNB with the near-RT RIC 125.

[0047] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 125, the non-RT RIC 115 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 125 and may be received from a non-network data source or from a network function at the SMO framework 105 or the non-RT RIC 115. In some examples, the non-RT RIC 115 or the near-RT RIC 125 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 115 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 105 (such as via reconfiguration of O1) or via the creation of RAN management policies (such as A1 policies).

[0048] At least one of the CU 110, the DU 130, and the RU 140 may be referred to as a base station 102. Therefore, the base station 102 may include one or more of the CU 110, the DU 130, and the RU 140 (each component is indicated by a dotted line to indicate that each component may be included in the base station 102, or may not be included in the base station). The base station 102 provides an access point to the core network 120 for the UE 104. The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). Small cells include femto cells, pico cells, and micro cells. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). The communication link between RU 140 and UE 104 may include uplink (UL) (also known as reverse link) transmission from UE 104 to RU 140 and / or downlink (DL) (also known as forward link) transmission from RU 140 to UE 104. The communication link may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmission diversity. The communication link may be through one or more carriers. For each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5MHz, 10MHz, 15MHz, 20MHz, 100MHz, 400MHz, etc.) bandwidth. The carriers may be adjacent to each other or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​compared to UL). The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0049] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL wireless wide area network (WWAN) spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, Bluetooth, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0050] The wireless communication system may also include a Wi-Fi AP 150 that communicates with a UE 104 (also referred to as a Wi-Fi station (STA)) via a communication link 154, e.g., in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed spectrum, the UE 104 / AP 150 may perform a clear channel assessment (CCA) to determine whether a channel is available prior to communication.

[0051] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the “sub-6 GHz” band in various documents and articles. A similar naming issue sometimes occurs with respect to FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0052] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125 GHz–24.25 GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6 GHz–71 GHz), FR4 (71 GHz–114.25 GHz), and FR5 (114.25 GHz–300 GHz). Each of these higher frequency bands falls within the EHF band.

[0053] In view of the above, unless otherwise specified, if the term "6 GHz or less" is used in this document, it can broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specified, if the term "millimeter wave" is used in this document, it can broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR2-2 and / or FR5, or may be within the EHF band.

[0054] The base station 102 and the UE 104 may each include multiple antennas (such as antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming. The base station 102 may send a beamformed signal 182 to the UE 104 in one or more transmit directions. The UE 104 may receive the beamformed signal from the base station 102 in one or more receive directions. The UE 104 may also send a beamformed signal 184 to the base station 102 in one or more transmit directions. The base station 102 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 102 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of the base station 102 / UE 104. The transmit direction and receive direction of the base station 102 may be the same or different. The transmit direction and receive direction of the UE 104 may be the same or different.

[0055] The base station 102 may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit receive point (TRP), a network node, a network entity, a network equipment, or some other suitable term. The base station 102 may be implemented as an integrated access backhaul (IAB) node, a relay node, a sidelink node, an aggregated (monolithic) base station with a baseband unit (BBU) (including a CU and a DU) and a RU, or as a disaggregated base station including one or more of a CU, a DU, and / or a RU. A set of base stations that may include disaggregated base stations and / or aggregated base stations may be referred to as a next generation (NG) RAN (NG-RAN).

[0056] The core network 120 may include an access and mobility management function (AMF) 161, a session management function (SMF) 162, a user plane function (UPF) 163, a unified data management (UDM) 164, one or more location servers 168, and other functional entities. AMF 161 is a control node that handles signaling between UE 104 and core network 120. AMF 161 supports registration management, connection management, mobility management, and other functions. SMF 162 supports session management and other functions. UPF 163 supports packet routing, packet forwarding, and other functions. UDM 164 supports the generation of authentication and key agreement (AKA) credentials, user identity handling, access authorization, and subscription management. One or more location servers 168 are illustrated as including a gateway mobile location center (GMLC) 165 and a location management function (LMF) 166. However, in general, the one or more location servers 168 may include one or more location / positioning servers, which may include one or more of the GMLC 165, LMF 166, positioning determination entity (PDE), serving mobile location center (SMLC), mobile positioning center (MPC), etc. GMLC 165 and LMF 166 support UE location services. GMLC 165 provides an interface for clients / applications (e.g., emergency services) to access UE positioning information. LMF 166 receives measurement results and auxiliary information from NG-RAN and UE 104 via AMF 161 to calculate the positioning of UE 104. NG-RAN may determine the positioning of UE 104 using one or more positioning methods. Positioning UE 104 may involve signal measurements, positioning estimates, and optional speed calculations based on these measurements. Signal measurements may be performed by UE 104 and / or serving base station 102. The measured signals may be based on a satellite positioning system (SPS) 170 (e.g., one or more of a global navigation satellite system (GNSS), a global positioning system (GPS), a non-terrestrial network (NTN), or other satellite positioning / location systems), LTE signals, wireless local area network (WLAN) signals, Bluetooth signals, a terrestrial beacon system (TBS), sensor-based information (e.g., an atmospheric pressure sensor, a motion sensor), an NR enhanced cell ID (NR E-CID) method, NR signals (e.g., multi-round trip time (multi-RTT), DL angle of departure (DL-AoD), DL time difference of arrival (DL-TDOA), UL time difference of arrival (UL-TDOA), and UL angle of arrival (UL-AoA) positioning), and / or one or more of other systems / signals / sensors.

[0057] Examples of UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet computers, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare equipment, implants, sensors / actuators, displays, or any other similarly functional devices. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as stations, mobile stations, subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, mobile phones, user agents, mobile clients, clients, or some other suitable terminology. In some scenarios, the term UE may also be applied to one or more supporting devices, such as in a device cluster arrangement. One or more of these devices may access the network collectively and / or individually.

[0058] Refer again Figure 1 In certain aspects, the UE 104 may include a BSR component 198 configured to: obtain an estimate of a second SDU based on at least one first SDU having a first arrival time at a modem of the UE, the estimate of the second SDU including a second arrival time at the modem of the UE, the second arrival time being after the first arrival time; and initiate sending of a second BSR for the second SDU based on the estimate of the second SDU. In certain aspects, the base station 102 may include an UL grant component 199 configured to: receive from a UE at least one BSR indicating at least one target PUSCH, the at least one BSR including a second BSR based on an estimate of a second SDU, the estimate of the second SDU including a second arrival time of the second SDU at a modem of the UE, the estimate of the second SDU based on at least one first SDU having a first arrival time at the modem of the UE, the second arrival time being after the first arrival time; send at least one uplink grant for the at least one target PUSCH based on the at least one BSR indicating the at least one target PUSCH; and receive the second SDU in the at least one target PUSCH. Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar fields, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0059] Figure 2AFIG200 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G NR subframe. Figure 2C FIG250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D FIG280 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL, or may be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A , Figure 2C In the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (most of which are DL), where D is DL, U is UL, and F is flexible between DL / UL, and subframe 3 is configured with slot format 1 (all of which are UL). Although subframes 3 and 4 are shown as having slot formats 1 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0 to 61. Slot formats 0 and 1 are both DL and both UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. The slot format is configured for the UE by a received slot format indicator (SFI) (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure as TDD.

[0060] FIG. 2A to FIG. 2DThe frame structure is illustrated, and various aspects of the present disclosure may be applicable to other wireless communication technologies that may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 subframes of the same size (1ms). Each subframe may include one or more time slots. A subframe may also include a microslot, which may include 7, 4 or 2 symbols. Each time slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is conventional or extended. For a conventional CP, each time slot may include 14 symbols, and for an extended CP, each time slot may include 12 symbols. The symbol on the DL may be a CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbol. The symbol on the UL may be a CP-OFDM symbol (for high throughput scenarios) or a discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbol (also known as a single carrier frequency division multiple access (SC-FDMA) symbol) (for power-limited scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the CP and parameter set. The parameter set defines the subcarrier spacing (SCS) and effectively defines the symbol length / duration, which is equal to 1 / SCS.

[0061]

[0062] For normal CP (14 symbols / slot), different parameter sets μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For extended CP, parameter set 2 allows 4 slots per subframe. Thus, for normal CP and parameter set μ, there are 14 symbols / slot and 2 μ timeslots / subframe. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is parameter set 0 to 4. Therefore, the subcarrier spacing for parameter set μ=0 is 15kHz, and the subcarrier spacing for parameter set μ=4 is 240kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIG. 2A to FIG. 2D An example of a parameter set μ=2 with a normal CP of 14 symbols per slot and 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is about 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) that are frequency-division multiplexed (see Figure 2B ). Each BWP may have a specific parameter set and CP (normal or extended).

[0063] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also referred to as a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a number of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0064] like Figure 2A As illustrated, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulation RS (DM-RS) (indicated as R for a particular configuration, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0065] Figure 2B Examples of various DL channels within a subframe of a frame are illustrated. A physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including six RE groups (REGs), each REG including 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., a common search space, a UE-specific search space) during a PDCCH monitoring opportunity on a CORESET, wherein the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies on the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by UE 104 to determine subframe / symbol timing and physical layer identification. A secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the system frame number (SFN) and the number of RBs in the system bandwidth. The physical downlink shared channel (PDSCH) carries user data, broadcast system information such as system information blocks (SIBs) that are not sent via the PBCH, and paging messages.

[0066] like Figure 2CAs illustrated, some of the REs carry DM-RS (indicated as R for a particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may send a DM-RS for a physical uplink control channel (PUCCH) and a DM-RS for a physical uplink shared channel (PUSCH). The PUSCH DM-RS may be sent in the first one or two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used, the PUCCH DM-RS may be sent in different configurations. The UE may send a sounding reference signal (SRS). The SRS may be sent in the last symbol of a subframe. The SRS may have a comb structure, and the UE may send the SRS on one of the comb teeth. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0067] Figure 2D Examples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACKs and / or negative ACKs (NACKs)). The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0068] Figure 3370 is a block diagram of a base station 310 communicating with a UE 350 in an access network. In the DL, Internet Protocol (IP) packets may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0069] The transmit (TX) processor 316 and receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transport channel, forward error correction (FEC) coding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-order phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The decoded and modulated symbols can then be divided into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation schemes, as well as for spatial processing. Channel estimates may be derived from reference signals and / or channel state feedback sent by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx may modulate a radio frequency (RF) carrier with a corresponding spatial stream for transmission.

[0070] At the UE 350, each receiver 354Rx receives a signal through its corresponding antenna 352. Each receiver 354Rx recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be merged into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier and the reference signal are recovered and demodulated by determining the most likely signal constellation point sent by the base station 310. These soft decisions can be based on channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by the base station 310. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.

[0071] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0072] Similar to the functions described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0073] The TX processor 368 may use channel estimates derived by the channel estimator 358 from a reference signal or feedback sent by the base station 310 to select appropriate coding and modulation schemes and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via corresponding transmitters 354Tx. Each transmitter 354Tx may modulate an RF carrier with a corresponding spatial stream for transmission.

[0074] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318Rx receives a signal through its corresponding antenna 320. Each receiver 318Rx recovers information modulated onto an RF carrier and provides the information to the RX processor 370.

[0075] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover IP packets. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0076] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 Aspects of the UL approved assembly 199 are incorporated.

[0077] Figure 4 4 is a diagram of a method of wireless communication including a BSR. Diagram 400 may include a UE 402 including an application 410 and a modem 420. In one aspect, the arrival of a service data unit (SDU) 412 in an empty buffer of the modem 420 may trigger the sending of a scheduling request (SR) 430 and a BSR 434. That is, the application 410 may send data to the modem via at least one SDU 412, and at least one SDU 412 carrying data from the application 410 may arrive at the modem 420, more specifically, at a buffer of the modem 420. Based on the arrival of at least one SDU 412 in the buffer of the modem 420 (which may be empty), the UE may send an SR 430 to a network node and send a BSR based on the data stored in the buffer of the modem 420. Based on the SR 430 received from the UE 402, the network node may send an uplink (UL) grant 432 to the UE 402, and the UE 402 may send a BSR 434 to the network node in the time slot indicated by the UL grant 432. Here, the UL channel indicated by the UL grant 432 may also be configured to send a PDU based on the SDU 412, and the BSR 434 may be sent with the PDU. The network node may determine based on the BSR 434 that the mode UL transmission may be configured to correctly send the data associated with the SDU 412, the network node may send another UL grant 436, and the UE may send the PDU 438 based on the UL grant 436.

[0078] In one aspect, the SDU 412 of the UE may arrive in the buffer of the modem 420 of the UE 402 after the SR opportunity (e.g., UL time slot 440), and eventually wait or suspend the transmission of the SDU 412 until the next SR opportunity, and the maximum value of the delay may be equal to the SR cycle. Here, the SR cycle may be 20 time slots, and because the SDU 412 from the application 410 may arrive at the modem 420 of the UE 402 after the UL time slot 440, the UE may wait until the subsequent SR opportunity 442 to send the SR 430 to the network node. Therefore, the delay until the next SR opportunity 450 may be added to the network delay.

[0079] In addition, the delay between the SR and PUSCH 452 in response to the SR 430 may also be added to the network delay. The delay between the SR based on the SR 430 and the PUSCH 452 may depend on the specific implementation of the network node, such as the frame mode (e.g., time slot format). Here, the diagram 400 shows that the frame mode has a time slot format of DDDSU in TDD. For applications that are sensitive to delay, these two delays may cause problems.

[0080] In some aspects, a configured grant or pre-scheduling of UL transmissions may allow the UE to send a BSR without an SR. That is, in order to allow the UE to send a BSR without an SR to reduce network overhead, the network node may provide at least one of a configured grant of UL transmissions or a pre-scheduling of UL transmissions. In one aspect, in the case of including a configured grant, the network node may need to know the period, offset, and size of the SDU that may not be available to the network node to support the configured grant. On the other hand, in the case of pre-scheduling of the UL channel, the UE may not have data to send for some of the pre-scheduled PUSCH allocations, and may not use the pre-scheduled PUSCH, which may result in a waste of radio resources.

[0081] Figure 5 500 is a diagram of a method of wireless communication including a BSR. Diagram 500 may include a UE 502 including an application 510 and a modem 520. In some aspects, the SDU transmission from the application 510 to the modem 520 may be quasi-periodic. That is, the application 510 may generate and transmit a data transmission stream in a periodic SDU with a certain jitter. Here, jitter may refer to a variation in the delay of a packet received by the modem from the application. For example, jitter may be caused by the processing time of the data volume at the application level.

[0082] In some aspects, SR and SDU traffic may be configured to have the same periodicity to reduce network latency or delay. In one example, the UE (or the UE's modem 520) may configure the periodicity of the SR based on the periodicity of the SDU traffic. In another example, the UE (or the UE's modem 520) may direct the application 510 to configure the periodicity of the SDU traffic based on the periodicity of the SR. By configuring the SR to be close to the arrival time based on the periodicity of the SDU, the delay until the next SR opportunity 550 (e.g., the next UL time slot 542) may be reduced.

[0083] In the case where the SR and the service are configured to have substantially the same periodicity, the SR configured to be close to the arrival time of the SDU based on the same periodicity may cause network delay due to jitter. That is, each SDU may be delayed by jitter, and for the SR configured for the corresponding arrival time of the SDU, the delayed SDU may not arrive at the modem of the UE in time. Due to jitter, the arrival time of the SDU received at the modem 520 may vary, and if the SR is configured to be close to the arrival time of the SDU based on the periodicity of the SDU, the SDU received after the SR opportunity due to jitter may experience a long delay until the next SR opportunity. In one example, if the SR is delayed long enough after the arrival time configured based on the SDU periodicity, the delayed SDU may experience useless delays and affect the average network delay. In another example, if the SR is configured to be close to the arrival time, some of the SDUs with a certain delay due to jitter may miss the SR, and these SDUs may have to wait for subsequent SR opportunities, which may affect the overall delay.

[0084] For example, diagram 500 shows that due to certain jitter, SDU 512 may arrive early or late. That is, modem 520 may instruct application 510 to send SDU 512 based on the arrival time of SDU 516 and configure SR 530 in SR opportunity 540, and due to jitter, SDU 514 may be sent before SDU 512 or SDU 516 may be sent after SDU 512. In one example, if SDU 512 is received at modem 520 before the arrival time of SDU 514, the delay of SDU 514 may be slightly increased until SR 530, but data of the SDU may be sent to the network node based on SR 530 in SR opportunity 540. In another example, if SDU 512 is received at modem 520 after the arrival time of SDU 516, data of SDU 516 may not be sent to the network node based on SR 530 in SR opportunity 550, and the delay until the next SR opportunity 540 (e.g., next UL timeslot 542) to transmit the SR (e.g., SR 532) may be significantly increased, for example, to the SR cycle.

[0085] Figure 6600 is a diagram of a method of wireless communication including a BSR. Diagram 600 may include a UE 602, which includes an application 610 and a modem 620. In one aspect, the application 610 and / or the modem 620 may utilize a quasi-periodic pattern of SDUs and estimate (or predict) the arrival of the next SDU through configuration or through AI / ML. That is, because the SDUs (e.g., SDU1 612 and SDU2 614) may be quasi-periodic (e.g., a periodic configuration of an application period with a certain jitter), at least one of the application 610 and / or the modem 620 may estimate the arrival time of the subsequent SDU. Based on the arrival time of the SDU received in the buffer of the modem 620, the modem 620 may estimate the arrival time of the next SDU to be received from the application 610. In addition, based on the arrival time of the SDU sent to the modem 620, the application 610 may estimate the arrival time of the next SDU to be sent to the modem 620.

[0086] Here, the estimation may be based on a configuration or an AI / ML model. In one aspect, the estimation may be configured for the UE 602. In one example, based on the category or at least one attribute of the SDU1 612, the application 610 or the modem 620 of the UE 602 may be configured to estimate the arrival time and / or size of the SDU2 614 based on the SDU1 612. In another example, the application 610 or the modem 620 of the UE 602 may include an AI / ML model for estimating future SDUs, and the application 610 or the modem 620 of the UE 602 may estimate the arrival time and / or size of the SDU2 614 based on the SDU1 612 using the AI / ML model.

[0087] In one aspect, the estimation of the arrival time of the next SDU (or future SDU) may include an estimation of the jitter associated with the next SDU. That is, the UE 602 may be configured to estimate the jitter associated with the next SDU and determine the arrival time of the next SDU taking into account the estimated jitter. Based on the estimated arrival time of the next SDU, the UE may schedule or configure the next PUSCH to send the data in the estimated SDU via the PDU.

[0088] In addition to the arrival time, the size of the next SDU may also be estimated. That is, based on the size of the SDU received in the buffer of the modem 620, the modem 620 may estimate the size of the next SDU to be received from the application 610. Furthermore, based on the size of the SDU sent to the modem 620, the application 610 may estimate the size of the next SDU to be sent to the modem 620.

[0089] Here, the modem 620 may receive SDU1 612 from the application 610. Based on SDU1 612, the application 610 or the modem 620 may estimate that SDU2 614 will arrive in the buffer of the modem 620 in the future. The estimation of SDU2 614 may include at least the arrival time of SDU2 614 or the size of SDU2 614.

[0090] The modem 620 may use the estimate of SDU2 614 to send an SR and a BSR before a future SDU (e.g., SDU2 614) actually arrives in the buffer. That is, based on the estimate of SDU2 614 based on SDU1 612, the modem 620 of the UE 602 may signal the estimate of SDU2 614 to the network node to configure the next PUSCH for sending data of SDU2 614.

[0091] For example, based on the estimate of SDU2 614, UE 602 may first send SR 630 to transmit BSR 633 to the network node. The network node may send UL grant 632 to UE 602 based on SR 630 received at SR opportunity 640, UL grant 632 indicating UL resources for UE 602 to send BSR 633, the BSR indicating the estimate of SDU2 614. Here, in the PUSCH sent based on SR 630, UE 602 may send the BSR to signal when the next PUSCH may be sent to match the arrival time of the estimated SDU (e.g., SDU2 614), and optionally to match the estimated size of the estimated SDU (e.g., SDU2 614). The BSR 633 may include or indicate at least one of the size (e.g., estimated size) of SDU2 614 or the time slots for sending the PUSCH including the data of SDU2 614 based on the estimated arrival time of SDU2 614. In one example, the BSR may include 10 time slots, indicating that the network node may send the PDU 638 including the data of SDU2 614 10 time slots from the sending of the BSR and before the next SR opportunity 642. Based on the BSR 633 including or indicating at least one of the size (e.g., estimated size) of SDU2 614 or the time slots for sending the PUSCH including the data of SDU2 614, the network node may send a UL grant 636 to configure the PUSCH for the UE 602 to send the PDU 638. Here, the PUSCH may have a time-frequency resource allocation corresponding to at least one of the size (e.g., estimated size) of SDU2 614 or a time slot for transmitting the PUSCH including data of SDU2 614 based on the estimation of SDU2 614. Here, the UL grant 636 may be received at the modem 620 before or after the SDU2 614 arrives at the modem 620 from the application 610. The UE 602 may transmit the PDU 638 based on the UL grant 636 received from the network node to transmit the data in the SDU2 614 based on the estimation of the SDU2 614.

[0092] Diagram 600 indicates that an estimate of SDU2 614 may be generated based on one past SDU (e.g., SDU1 612), but aspects of the present disclosure are not limited thereto, and multiple past SDUs including SDU1 612 may be configured to estimate the arrival time and / or size of SDU2 614. In addition, multiple future SDUs may be estimated based on one or more past SDUs received at modem 620 of UE 602.

[0093] Here, an estimate of the arrival time (and / or size) of future SDUs may be done by the application 610 or by the modem 620. When this estimate is available to the modem 620, the modem may trigger a BSR 633, as opposed to the case where an SDU arriving at an empty buffer may trigger a BSR.

[0094] In one aspect, modem 620 may be configured to trigger BSR 633 based on a known estimate of a future SDU (eg, SDU2 614). Additionally, if an UL grant is not received before the next estimated SDU2 614, the BSR may trigger the transmission of SR 630.

[0095] In another aspect, the network node may configure a UL configured grant that may be dedicated for sending the BSR 633. That is, the UL may be configured with the configured grant for the UE, and the configured grant may schedule a UL timeslot for the UE to send the BSR 633 based on an estimate of SDU2. If the UE has no estimate and therefore no BSR to transmit, the UE may be configured to skip sending the configured grant.

[0096] In some aspects, based on the estimation of the future SDU (e.g., SDU2 614), a BSR for the future SDU may be triggered based on the estimation of the future SDU, and the UE may send an SR (e.g., SR 630) to send a BSR (e.g., BSR 633) before the arrival of the future SDU (e.g., SDU2 614). Based on the triggering of the BSR associated with the future SDU, the future SDU may or may not have arrived in the buffer before the BSR is sent to the network node.

[0097] In one example, the SDU associated with the estimate that triggered the BSR may have arrived in the buffer of the UE's modem before the sending of the BSR, and the UE may send the BSR including the actual size of the SDU without any additional timing information. Based on the BSR, the network node may send a subsequent UL grant to configure the UE with network resources for sending a PUSCH carrying data for the SDU. Here, the UL grant may be configured based on the actual size of the SDU that has arrived in the buffer of the modem.

[0098] In another example, the SDU associated with the estimate that triggered the BSR may not have arrived in the buffer of the UE's modem before the sending of the BSR, and the UE may send a BSR with a dedicated format that includes the estimated size and / or timing information of the SDU. Here, the dedicated format of the BSR may be provided to include the time when the next PUSCH (e.g., the target PUSCH) may be sent. That is, if the SDU has not arrived in the buffer, the UE may send a new BSR with a dedicated format to report the expected size of the BSR (if available) and the time when the target PUSCH may be sent to deliver the BSR and / or PDU of the SDU. Therefore, the UE and the network node may be configured with a dedicated format for the BSR, which may include the estimated size of the future SDU and / or the estimated time when the target PUSCH may be configured by the network node to send the PDU carrying data of the future SDU. For example, the timing of the target PUSCH may be signaled as the number of time slots from the PUSCH containing the BSR. In addition, if available, the estimated size may be reported in the BSR (e.g., BSR table).

[0099] For example, SDU2 614 does not arrive in modem 620 before the transmission of BSR 633, and UE 602 may transmit a BSR including the estimated size of SDU2 614 and the target PUSCH for transmitting PDU 638. Here, BSR 633 may indicate 10 time slots, and the network node may send UL grant 636 to allocate network resources (10 time slots starting from the transmission of BSR) for the target PUSCH to transmit PDU 638.

[0100] Figure 7 700 is a method of wireless communication including BSR. Diagram 700 may include UE 702 including application 710 and modem 720. In some aspects, modem 720 of UE 702 may direct (or configure) application 710 to align SDU traffic based on an estimate of the next SDU2.

[0101] First, the arrival of the SDU in an empty buffer may trigger a BSR, which may trigger the sending of an SR. Here, based on the arrival of SDU1 712 in the buffer of the modem 720 of the UE 702, the modem 720 may be configured to send an SR 730, which requests the network node to configure network resources for sending the BSR and / or PDU1 carrying the data of SDU1. Based on the SR 730, the UE 702 may receive a UL grant 731, and based on the UL grant 731, send a BSR1 and / or PDU1 732 to the network node.

[0102] Here, the delay 750 may occur between the arrival of the SDU1 712 at the modem 720 of the UE and the transmission of the BSR1 and / or PDU1 732. That is, the BSR1 and / or PDU1 732 may be transmitted to the network node after the delay 750 from the arrival of the SDU1 712. The delay 750 may include a first delay component between the arrival time of the SDU1 712 and the first available SR opportunity 740, and a second delay component between the first available SR opportunity 740 and the transmission of the BSR and / or PDU1 732. In one aspect, the first delay component of the delay 750 may be reduced by aligning the arrival time of the SDU1 712 so that the SDU1 712 may be delivered before the first available SR opportunity 740 but as close to the first available SR opportunity as possible.

[0103] On the other hand, the second delay component of the delay 750 may follow a predictable pattern. For example, in the case of a TDD-SCS=30kHz configuration using a DDDSU slot format, the second delay component of the delay 750 may be estimated to be 1.5ms. In one example, the modem 720 and the UE 702 may estimate the second delay component of the delay 750 based on a configuration or an AI / ML model. The modem 720 may report the estimated information to the application 710 so that the application 710 may align the delivery of future UL SDUs (e.g., SDU2) based on the UL grant.

[0104] For example, the modem 720 may report information associated with the second delay component of the delay 750 or 752 to the application 710, and direct the application 710 to align SDU2 to reduce the delay 752. Here, the information associated with the second delay component of the delay 750 or 752 may include the SR mode and / or the delay 713 of the SR to UL grant. Based on the SR mode and / or the delay 713 of the SR to UL grant, the application 710 may align SDU2 as close to the PUSCH to reduce the delay 752. Based on the estimation of the arrival time of the next SDU (e.g., SDU2 714), the BSR may be triggered so that the modem 720 may send the SR 735 in the nearest opportunity (e.g., the nearest SR opportunity 742) before the arrival time of SDU2 714 in the buffer.

[0105] In one aspect, the modem 720 may report timing information to the application 710 via a cross-layer API, the timing information including the SR mode and / or the delay between the SR and the UL grant 731. In another aspect, the application 710 may align the delivery of future SDUs (e.g., SDU2 714) based on the timing information (e.g., SR mode and / or the delay between the SR and the UL grant 713) received from the modem 720 to reduce latency 752. For example, the time at which the modem constructs the MAC PDU of PDU2 based on SDU2 may be considered to align the delivery of future SDUs (e.g., SDU2 714).

[0106] On the other hand, based on the estimation of the arrival time of SDU2 714, the modem 720 may trigger BSR2, causing the modem to send SR 735 in the nearest SR opportunity 742 before SDU2 714 arrives in the buffer. The network node may send UL grant 736 based on SR 735, and the UE 702 may send BSR2 and PDU2 737 for SDU2 714 based on the UL grant 736 received from the network node. By transmitting SR 735 in the nearest SR opportunity 742 before SDU2 714 arrives in the buffer, the UE 702 may eliminate a first delay component of delay 752 and reduce a second delay component of delay 752, thereby reducing delay 752 associated with sending data of SDU2 in PDU2 737.

[0107] Figure 8 800 is a method of wireless communication including BSR. Diagram 800 may include UE 802, which includes application 810 and modem 820. Diagram 800 illustrates that more than one SDU (e.g., multiple SDUs) may be scheduled or communicated between application 810 and UE 802. Multiple SDUs may be delivered by application 810 between two consecutive SR opportunities. Multiple SDUs may be from the same stream or from different streams. Here, SDU A1 812 and SDU B1 822 may be from different data streams and may be received at a buffer of modem 820 between two consecutive SR opportunities.

[0108] Here, the BSR may support signaling of estimated information about multiple SDUs, or the BSR may include estimated information about the earliest future SDU. The UE and the network node may be configured to select or switch to include estimated information about multiple SDUs or the earliest future SDU. In one example, the network node may direct the UE to include estimated information about multiple SDUs in the BSR, or to include estimated information about the earliest future SDU in the BSR. In another example, the UE may indicate to the network node that the UE may include estimated information about multiple SDUs in the BSR, or to include estimated information about the earliest future SDU in the BSR.

[0109] In some aspects, the BSR may support by signaling an estimated size and / or timing of a target PUSCH for a plurality of SDUs. Each of the plurality of SDUs may be estimated to be received from the application until the next SR opportunity, and the UE may signal the estimated size and target PUSCH associated with each of the plurality of SDUs to the network node via a BSR having a dedicated format. That is, the BSR may carry information of at least one estimate of a plurality of SDUs arriving in a buffer of a modem.

[0110] For example, the modem 820 of the UE 802 may receive the SDU A1 812 and the SDU B1 822 from the application 810 and initiate the transmission of the BSR 832. Based on the SDU A1 812 and the SDU B1 822, at least one of the application 810 or the modem 820 may estimate a plurality of future SDUs (e.g., SDU A2 814 and SDU B2 824). The estimation may include the respective sizes of the SDU A2 814 and the SDU B2 824 and the timing of the PUSCH for transmitting the SDU A2 814 and the SDU B2 824.

[0111] UE 802 may send SR 830 in SR opportunity 840, and receive UL grant 831 for sending BSR 832. Here, BSR 832 may include estimates of SDU A2 814 and SDU B2 824. BSR 832 may indicate the sizes of SDU A2 814 and SDU B2 824, and a first target PUSCH for sending SDU A2 814 may be scheduled after 10 slots from BSR 832, and a second target PUSCH for sending SDU B2 824 may be scheduled after 15 slots from BSR 832.

[0112] Based on the BSR 832, the network node may transmit an UL grant 833 to schedule a first target PUSCH for SDU A2 814 in a first target time slot 842, and the UE 802 may receive SDU A2 814 in the first target PUSCH and send PDU A2 835 based on the UL grant 833. The network node may also transmit an UL grant 836 to schedule a second target PUSCH for SDU B2 824 in a second target time slot 844, and the UE 802 may receive SDU B2 824 in the second target PUSCH and send PDU B2 837 based on the UL grant 836.

[0113] Fig. 9 900 is a method of wireless communication including a BSR. The diagram 900 may include a UE 902 including an application 910 and a modem 920. In some aspects, the BSR may include information regarding an estimate of an earliest future SDU. That is, the BSR may support signaling an estimated size and / or timing of a target PUSCH for an SDU that is estimated to subsequently arrive at a buffer of the modem 920 of the UE 902. Here, the modem 920 may transmit a BSR with the estimated information of the earliest future SDU, which may reduce overhead from the BSR having a new format.

[0114] For example, the modem 920 of the UE 902 may receive the SDU A1 912 and the SDU B1 922 from the application 910 and initiate the transmission of the BSR 932. Based on the SDU A1 912 and the SDU B1 922, at least one of the application 910 or the modem 920 may estimate a plurality of future SDUs (e.g., SDU A2 914 and SDU B2 924). The estimation may include the respective sizes of the SDU A2 914 and the SDU B2 924 and the timing of the PUSCH for transmitting the SDU A2 914 and the SDU B2 924.

[0115] The UE 902 may transmit the SR 930 in the SR opportunity 940, and receive a UL grant 931 for transmitting the BSR 932. In the PUSCH scheduled by the SR 930, the modem 920 of the UE 902 may transmit the BSR 932 having information about the SDU A2 914. The BSR 932 may indicate the size of the SDU A2 914, and a first target PUSCH for transmitting the SDU A2 914 may be scheduled after 10 slots from the BSR 932. Based on the BSR 932, the network node may transmit a UL grant 933 to schedule a first target PUSCH for the SDU A2 914 in a first target slot 942, and the UE 902 may receive the SDU A2 914 in the first target PUSCH and transmit the PDU A2 935 based on the UL grant 933.

[0116] The UE 902 may also send a BSR 934 associated with the SDU B2 924 and a PDU A2 935 in the first target PUSCH. Based on the BSR 934, the network node may transmit an UL grant 936 to schedule a second target PUSCH for the SDU B2 924 in a second target time slot 944, and the UE 902 may receive the SDU B2 924 in the second target PUSCH and send the PDU B2 937 based on the UL grant 936. The BSR 934 may indicate the size of the SDU B2 924, and the second target PUSCH for sending the SDU B2 924 may be scheduled 5 time slots from the BSR 934.

[0117] Fig.10 1000 is a diagram of a method of wireless communication including a BSR. Diagram 1000 may include a UE 1002 including an application 1010 and a modem 1020. In another aspect, the BSR may include information about an estimate of the earliest future SDU, and in the event that the BSR indicates that a PDU and a subsequent BSR associated with the future SDU are included in a target PUSCH, the BSR may indicate to the network that the target PUSCH may have a size to support the PDU and the subsequent BSR.

[0118] For example, the modem 1020 of the UE 1002 may receive the SDU A1 1012 and the SDU B1 1022 from the application 1010 and initiate the transmission of the BSR 1032. Based on the SDU A1 1012 and the SDU B1 1022, at least one of the application 1010 or the modem 1020 may estimate a plurality of future SDUs (e.g., SDU A2 1014 and SDU B2 1024). The estimation may include the respective sizes of the SDU A2 1014 and the SDU B2 1024 and the timing of the PUSCH for transmitting the SDU A2 1014 and the SDU B2 1024.

[0119] UE 1002 may send SR 1030 in SR opportunity 1040, and receive UL grant 1031 for sending BSR 1032. In the PUSCH scheduled by SR 1030, modem 1020 of UE 1002 may transmit BSR 1032 with information about SDU A2 1014. BSR 1032 may indicate the size of SDU A2 1014, and a first target PUSCH for sending SDU A2 1014 may be scheduled after 10 slots from BSR 1032.

[0120] Here, the size of the target PUSCH for SDU A2 1014 may take into account the size of the new BSR. That is, when sending the BSR 1032 for SDU A2 1014, the UE 1002 may include the size of the BSR 1034 for SDU B2 1024 in the amount of data waiting to be sent. Based on the BSR 1032, the network node may transmit an UL grant 1033 to schedule a first target PUSCH for SDU A2 1014 and the BSR 1034 associated with SDU B2 1024 in the first target time slot 1042, and the UE 1002 may receive SDU A2 1014 in the first target PUSCH and send PDU A2 1035 and the BSR 1034 associated with SDU B2 1024 based on the UL grant 1033.

[0121] A BSR 1034 associated with SDU B2 1024 and PDU A2 1035 are sent in the first target PUSCH. Based on the BSR 1034, the network node may transmit an UL grant 1036 to schedule a second target PUSCH for SDU B2 1024 in a second target time slot 1044, and the UE 1002 may receive SDU B2 1024 in the second target PUSCH and send PDU B2 1037 based on the UL grant 1036. The BSR 1034 may indicate the size of the SDU B2 1024, and the second target PUSCH for sending SDU B2 1024 may be scheduled 5 time slots from the start of the BSR 1034.

[0122] Fig.11 1100 is a method of wireless communication including a BSR. The diagram 1100 may include a UE 1102 including an application 1110 and a modem 1120. In some aspects, the UE 1102 may include a BSR including an estimate of future SDUs and a transmission of the SDUs arriving at a buffer of the modem 1120. Here, an estimate of one or more subsequent SDUs may be generated or obtained based on one or more SDUs previously arriving in the buffer of the modem 1120, and the UE 1102 may deliver the SDUs from the application 1110 to the modem 1120 in the event that a series of multiple SDUs are communicated between the application 1110 and the modem 1120 of the UE 1102. N Get SDU N+1 The modem 1120 may estimate the arrival time and / or size of the SDU based on the N To obtain the SDU N+1 In the case of an estimation, the modem 1120 may send an SDU N PDUs N The next SDU is indicated in the BSR N+1 Therefore, the UE and the network node can reduce the number of SRs sent.

[0123] For example, the modem 1120 may receive the SDU from the application 1110 N 1112. Based on SDU N 1112, the application 1110 or the modem 1120 may estimate the SDU N+1 1114 will arrive in the buffer of modem 1120 in the future. N+1 The estimate of 1114 may include at least SDU N+1 Arrival time of 1114 or SDU N+1 The size of 1114.

[0124] UE 1102 may receive an UL grant 1131 indicating a first target time slot 1142 for UE 1102 to send a BSR 1132 indicating a request for an SDU. N+1 1114 Estimation and Carrying SDU N 1112 data PDU N 1133. BSR 1132 may include SDU N+1 1114 and the estimated size of the second target PUSCH that can be sent to deliver the BSR 1136 and PDU N+1 For example, BSR 1132 may indicate that a second target PUSCH may be sent to deliver a second target time slot 1144 of BSR 1132, and the PDU may be scheduled 25 time slots later from the transmission of BSR 1136. N+1 1137.

[0125] Based on the BSR 1132, the network node may send an UL grant 1135 to schedule a second target PUSCH for the UE 1102 to send a BSR 1136 indicating the SDU N+2 Estimation and carrying of SDU N+1 1114 Data PDU N+1 1137. UE 1102 may receive an UL grant 1135 indicating a second target time slot 1144 for UE 1102 to send a BSR 1136 indicating a request for the SDU N+2 Estimation and carrying of SDU N+1 1114 Data PDU N+1 1137. BSR 1136 may include SDU N+2 and a third target PUSCH may be sent to deliver the BSR 1136 and PDU N+1 For example, BSR 1136 may indicate a third target time slot in which a third target PUSCH may be transmitted to deliver a subsequent BSR, and the PDU may be scheduled after 25 time slots from the transmission of BSR 1136.

[0126] Fig.121200 is a diagram of a method of wireless communication including a BSR. Diagram 1200 may include a UE 1202 including an application 1210 and a modem 1220. In some aspects, a UE with quasi-periodic traffic may be configured with a UL configured grant (CG). That is, a network node may configure a UL CG for a UE with quasi-periodic traffic, and the UE may send UL data based on the UL CG with a UL CG period.

[0127] For example, the UE 1202 may estimate that SDU1 1212 and SDU2 1214 may be quasi-periodic services with an application period and a certain jitter. Based on the estimation, the network node may configure a UL CG every 20 time slots (UL CG period) for the UE to send SDU1 1212 and SDU2 1214. The modem 1220 of the UE 1202 may receive SDU1 1212 in a first UL CG time slot 1240 and send PDU1 1232 of SDU1 1212 based on the UL CG configuration. If SDU2 1214 is received in the application period, the UE 1202 may send PDU2 of SDU2 1214 at a second UL CG time slot 1242 based on the UL CG configuration.

[0128] In one aspect, due to jitter, some SDUs may arrive in the buffer after the UL CG opportunity, and some SDUs of UE1202 may miss the configured transmission opportunity of the UL CG (e.g., the second UL CG time slot 1242). When a delayed SDU misses the configured opportunity for sending the UL CG, UE 1202 may send a BSR including information about the delayed SDU that missed the configured UL CG and the target PUSCH for sending the PDU associated with the delayed SDU. That is, if the delayed SDU misses the UL CG transmission opportunity, UE 1202 may send a BSR having information (or an estimate) about the delayed SDU. That is, on the UL CG missed by the delayed SDU, UE 1202 may send a BSR having information about the target PUSCH of the later SDU that missed the UL CG. When a new BSR is received in the UL CG, the network node may transmit a dynamic grant (e.g., an UL grant) in an appropriate time slot to schedule the target PUSCH indicated by the BSR.

[0129] For example, SDU2 1214 may be received at the modem 1220 of the UE 1202 with a delay (e.g., jitter) through the second UL CG time slot 1242. Therefore, the UE 1202 may be configured to send a BSR 1235 including the size of PDU2 1237 based on SDU2 1214 and a target PUSCH in the target time slot 1244 for sending PDU2 1237. Here, the BSR 1235 may indicate the size of SDU2 1214, and the target PUSCH for sending SDU2 1214 may be scheduled after 5 time slots from the BSR 1235. The network node may send a UL grant 1236 based on the BSR 1235, and schedule the target PUSCH in the target time slot 1244. After SDU2 1214 arrives at the buffer of modem 1220 of UE 1202 , UE 1202 may send PDU2 1237 via the target PUSCH scheduled in target time slot 1244 .

[0130] Fig.13 1300 is a diagram of a method of wireless communication including a BSR. Diagram 1300 may include a UE 1302, which includes an application 1310 and a modem 1320. In some aspects, the BSR may also include a request for scheduling multiple PUSCHs. The estimate of the arrival time of future SDUs may be affected by jitter and inaccurate. That is, some future SDUs may be delayed to arrive in the buffer after the estimated arrival time, and the delayed SDUs may not be sent to the network node in the target PUSCH scheduled based on the BSR. The BSR may include an indication of multiple target PUSCHs, and the network node may determine whether to schedule multiple target PUSCHs for UE 1302 to send SDUs. In one aspect, the scheduling of multiple target PUSCHs may be based on the cell being not heavily loaded. On the other hand, the indication of multiple target PUSCHs may be a simple flag or an estimate of the number of additional PUSCHs for scheduling by the network node. Based on the BSR, the network node may allocate additional PUSCHs through multiple UL grants (eg, multiple dynamic UL grants) or through one UL grant that allocates multiple consecutive PUSCHs (eg, semi-persistent scheduling).

[0131] In some aspects, the network may receive a BSR including an indication of multiple target PUSCHs and schedule the multiple target PUSCHs. Based on the BSR including an indication of the multiple target PUSCHs, the network node may allocate several PUSCHs starting from the target PUSCH (e.g., if the cell is not heavily loaded). In one aspect, when the SDU arrives at the buffer of the modem 1320 of the UE 1302, the network node may semi-persistently schedule multiple PUSCHs for the UE to send the SDU via the first available PUSCH among the multiple PUSCHs. In another aspect, the network node may transmit multiple dynamic grants (multiple UL grants) until a PDU for the SDU is received from the UE 1302.

[0132] For example, UE 1302 may estimate that SDU1 1312 and SDU2 1314 may be quasi-periodic services with an application period and a certain jitter. Based on the estimation of SDU2 1314, UE 1302 may first send SR 1330 to transmit BSR 1333 to the network node. The network node may send UL grant 1332 to UE 1302 based on SR 1330 received at SR opportunity 1340, UL grant 1332 indicating UL resources for UE 1302 to send BSR 1333, the BSR indicating the estimation of SDU2 1314. Here, in the PUSCH transmitted based on the SR 1330, the UE 1302 may transmit a BSR 1333 to signal when the next PUSCH may be transmitted to match the estimated arrival time of the SDU (e.g., SDU2 1314), and optionally the estimated size of the estimated SDU (e.g., SDU2 1314). The BSR 1333 may include or indicate at least one of the size (e.g., estimated size) of SDU2 1314 or the time slot for transmitting the PUSCH including the data of SDU2 1314 based on the estimated arrival time of SDU2 1314. In one example, the BSR may include 10 time slots, indicating that the network node may transmit PDU2 1338 including the data of SDU2 1314 10 time slots from the transmission of the BSR and before the next SR opportunity.

[0133] In one aspect, due to jitter, some SDUs may arrive in the buffer after the UL CG opportunity, and some SDUs of UE 1302 may miss the configured transmission opportunity of the UL CG (e.g., the second UL CG time slot). To support delayed SDUs that may miss the first SR opportunity to transmit the UL CG, UE 1302 may include an indication of multiple target PUSCHs in the BSR, and the network node may configure the multiple target PUSCHs based on the BSR.

[0134] For example, SDU2 1314 may be received at modem 1320 of UE 1302 with a delay (e.g., jitter) through the second UL CG time slot. BSR 1333 may include an indication of multiple target PUSCHs, and the network node may configure the multiple target PUSCHs. The network node may send an UL grant 1336 to the UE to schedule the target PUSCH in the first target time slot 1342. Because SDU2 1314 has been delayed and does not arrive before the first target time slot 1342, UE 1302 may not be able to send PDU2 of SDU2 1314 in the first target time slot 1342. The network node may send an UL grant 1337 to schedule the second target PUSCH in the second target time slot 1344. SDU2 1314 may arrive in a buffer of modem 1320 of UE 1302, and based on UL grant 1337, UE 1302 may send PDU2 1338 of SDU2 1314 to the network node. Here, the PUSCH may have a time-frequency resource allocation corresponding to at least one of the size (e.g., estimated size) of SDU2 1314 or a time slot for sending PUSCH including data of SDU2 1314 based on an estimate of SDU2 1314.

[0135] Fig.14 1400 is a call flow diagram of a method of wireless communication. The call flow diagram 1400 may include a UE 1402 and a network node 1404. The UE 1402 may be configured to obtain one or more estimates of one or more future SDUs based on one or more past SDUs, and to initiate transmission of one or more BSRs for the one or more future SDUs based on the one or more estimates of the one or more future SDUs. The one or more estimates may include an estimated time of arrival of the one or more future SDUs and an estimated size of the one or more future SDUs. Based on the BSRs, the network node 1404 may configure an UL grant for the UE 1402 for transmitting the one or more BSRs and one or more PDUs carrying data of the one or more SDUs.

[0136] At 1406, at least one first SDU may arrive at a modem of the UE 1402 at a first arrival time. In one aspect, the arrival of the SDU into an empty buffer of the modem may trigger the sending of the SR and the BSR.

[0137] At 1408, the UE 1402 may obtain an estimate of a second SDU based on at least one first SDU having a first arrival time at a modem of the UE 1402, the estimate of the second SDU including a second arrival time at the modem of the UE 1402, the second arrival time being after the first arrival time. The estimate of the second SDU may be performed by an application or a modem of the UE 1402.

[0138] In one aspect, the estimation may be based on a configuration or an AI / ML model. In one aspect, the estimation may be configured for UE 1402. In one example, based on a category or at least one attribute of a first SDU, an application or modem of UE 1402 may be configured to estimate an arrival time and / or size of a second SDU based on the first SDU. In another example, an application or modem of UE 1402 may include an AI / ML model for estimating future SDUs, and the application or modem of UE 1402 may estimate an arrival time and / or size of a second SDU based on the first SDU using the AI / ML model.

[0139] In another aspect, the estimation of the arrival time of the second SDU may include an estimation of jitter associated with the second SDU. That is, the UE 1402 may be configured to estimate the jitter associated with the second SDU and determine the arrival time of the second SDU taking into account the estimated jitter. Based on the estimated arrival time of the second SDU, the UE 1402 may schedule or configure the target PUSCH to send a PDU including the data in the second SDU via the target PUSCH.

[0140] The estimation of the second SDU may further include an estimated size of the second SDU based on the size of at least one first SDU. That is, in addition to the arrival time, the size of the second SDU may be estimated. That is, based on the size of the first SDU received in the buffer of the modem, the modem may estimate the size of the second SDU to be received from the application. In addition, based on the size of the SDU sent to the modem, the application may estimate the size of the second SDU to be sent to the modem.

[0141] At 1410, the UE 1402 may obtain an SR mode and a first estimate of a delay between an SR associated with a second BSR and an uplink grant following the SR associated with the second BSR. In one aspect, the delay or latency between the arrival of the first SDU at the modem of the UE 1402 and the transmission of the first BSR and / or the first PDU may include a first latency component between the arrival time of the first SDU and the first available SR opportunity, and a second latency component between the first available SR opportunity and the transmission of the first BSR and / or the first PDU. Information associated with the second latency component of the latency may include an SR mode and / or a delay of the SR to UL grant. Based on the SR mode and / or the delay of the SR to UL grant, the application may align the second SDU as close to the PUSCH to reduce latency. Based on the estimate of the arrival time of the second SDU, a BSR may be triggered so that the modem may send the SR at the nearest opportunity before the arrival time of the second SDU in the buffer.

[0142] At 1412, the UE 1402 may align the second arrival time based on the SR mode and the first estimate of the delay. In some aspects, the modem of the UE 1402 may direct (or configure) an application of the UE 1402 to align SDU traffic based on the estimate of the second SDU. Here, the modem may report timing information to the application via a cross-layer API, the timing information including the SR mode and / or the delay between the SR and the UE 1402 grant. The application may align the delivery of future SDUs based on the timing information received from the modem to reduce latency. For example, the delivery of future SDUs (e.g., the second SDU) may be aligned based on the time at which the modem constructs a MAC PDU of the second PDU based on the second SDU.

[0143] The modem of UE 1402 may report information associated with the second delay component of the delay to the application and instruct the application to align the second SDU to reduce the delay. Here, the information associated with the second delay component of the delay may include the SR mode and / or the delay of the SR to UL grant. Based on the SR mode and / or the delay 713 of the SR to UL grant, the application may align the second SDU to be as close as the PUSCH to reduce the delay. Based on the estimate of the arrival time of the next SDU (e.g., the second SDU), the BSR may be triggered so that the modem can send the second SR at the closest opportunity before the arrival time of the second SDU in the buffer.

[0144] In some aspects, multiple SDUs may be delivered to the modem of UE 1402 by an application of UE 1402 between two consecutive SR opportunities. For example, a first SDU and a third SDU may arrive in a buffer of the modem of UE 1402, and UE 1402 may estimate a future second SDU and a fourth SDU based on the first SDU and the third SDU. Here, the second SDU and the fourth SDU may be associated with the same data stream or different data streams. At 1414, UE 1402 may obtain a fourth estimate of a fourth SDU based on a third SDU having a third arrival time at the modem of UE 1402, the fourth estimate including that the fourth SDU is estimated to arrive at a fourth arrival time at the modem of UE 1402 after the third arrival time, and the second SDU is different from the fourth SDU. The estimate of the second SDU may be done by an application or modem of UE 1402. The estimate may be based on a configuration or an AI / ML model. In one aspect, the estimate may be configured for UE 1402. Here, the second SDU and the fourth SDU may be associated with different streams. The estimation of the fourth SDU may also include an estimated size of the fourth SDU based on the size of the third SDU.

[0145] At 1416, the UE 1402 may initiate transmission of a second BSR for the second SDU based on the estimation of the second SDU. In one aspect, the transmission of the second BSR is initiated based on not receiving an uplink grant after the second arrival time and before a subsequent SR opportunity. In one aspect, the SDUs of the UE 1402 may arrive in a buffer of the modem of the UE 1402 after the SR opportunity and eventually wait or suspend transmission of the SDUs until the next SR opportunity.

[0146] At 1418, UE 1402 may send the SR before the second arrival time. Network node 1404 may receive the SR before the second arrival time. Here, based on the estimate of the second SDU, UE 1402 may send the SR to request a UL grant for transmitting a second BSR to network node 1404. Network node 1404 may send a UL grant to UE 1402 based on the SR received at the SR opportunity, the UL grant indicating UL resources for UE 1402 to send a second BSR indicating an estimate of the second SDU. At 1420, based on the SR, network node 1404 may send a UL grant specifically for sending the second BSR.

[0147] At 1420, the network node 1404 may send an uplink grant based on the SR. The UE 1402 may receive the uplink grant based on the SR. The network node 1404 may configure a UL configured grant that may be dedicated to sending the second BSR. That is, the network node 1404 may configure the UL configured grant for the UE 1402, and the UL configured grant may indicate a scheduling plan for the UL time slot for the UE 1402 to send the second BSR based on the estimation of the second SDU.

[0148] In one example, the uplink grant may be a configuration of at least one specifically configured grant for sending a second BSR for the second SDU based on an estimate of the second SDU. In another example, the second BSR may be sent based on the uplink grant before the second arrival time.

[0149] At 1422, UE 1402 may send a second BSR to network node 1404. Network node 1404 may receive at least one BSR indicating at least one target PUSCH from UE 1402, the at least one BSR including the second BSR based on an estimate of a second SDU, the estimate of the second SDU including a second arrival time of the second SDU at a modem of UE 1402, the estimate of the second SDU based on at least one first SDU having a first arrival time at the modem of UE 1402, the second arrival time being after the first arrival time.

[0150] The second BSR may include or indicate at least one of a size (eg, estimated size) of the second SDU or a time slot for transmitting a target PUSCH including data of the second SDU based on an estimated arrival time of the second SDU.

[0151] In one aspect, a second BSR for the second SDU may be sent via a grant of the uplink configuration based on the second SDU not being received at the modem of the UE 1402 prior to the grant of the uplink configuration; and the second BSR for the second SDU may be sent via a grant of the uplink configuration based on the second SDU not being received at the modem of the UE 1402 prior to the grant of the uplink configuration. That is, if the second SDU has not yet arrived in the buffer, the UE 1402 may send a second BSR with a dedicated format to report the expected size of the second BSR (if available) and the time at which a target PUSCH may be sent to deliver the second BSR of the second SDU and / or the second PDU. In another aspect, the second BSR may be sent in a PUSCH in which at least one first SDU is sent.

[0152] Based on the second BSR including or indicating at least one of the size (e.g., estimated size) of the second SDU or the time slot of the target PUSCH for sending data including the second SDU, the network node 1404 may send an UL grant to configure the target PUSCH for UE 1402 to use for sending a second PDU carrying data of the second SDU.

[0153] The second BSR for the second SDU may include an indication of the plurality of target PUSCHs, and wherein the second SDU is transmitted in at least one of the plurality of target PUSCHs. In one aspect, based on the plurality of SDUs that may be delivered by an application of UE 1402 to a modem of UE 1402 between two consecutive SR opportunities, the second BSR may include an indication of the plurality of target PUSCHs. In one example, the second BSR may include an estimate of the second SDU and the fourth SDU.

[0154] In another example, the BSR may include an indication of an estimate regarding the second SDU, and the indication of an estimate regarding the fourth SDU may be sent with the second PDU based on the second SDU at 1424. Based on indicating the estimate regarding the fourth SDU with the second PDU, the second BSR may indicate a size of the fourth BSR to be included in the second target PUSCH. That is, the second BSR may indicate the size of the second SDU and the size of the fourth BSR, and the network node 1404 may send an UL grant to schedule the second PDU for sending the second SDU and the second target PUSCH of the fourth BSR associated with the fourth SDU.

[0155] At 1424, UE 1402 may send a second PDU via the target PUSCH based on the second BSR. Network node 1404 may receive the second SDU in at least one target PUSCH. In one aspect, a fourth BSR for a fourth SDU based on the fourth estimate may be sent with the second PDU, the fourth BSR being included in the second target PUSCH to send the second SDU based on the second BSR. In one aspect, a fourth BSR for the fourth SDU is based on the fourth estimate, the fourth BSR being included in the second target PUSCH to send the second SDU based on the second BSR.

[0156] Fig.151500 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104 / 402 / 502 / 602 / 702 / 802 / 902 / 1002 / 1102 / 1202 / 1302 / 1402; apparatus 1904). The UE may be configured to obtain one or more estimates of one or more future SDUs based on one or more past SDUs, and to initiate transmission of one or more BSRs for one or more future SDUs based on the one or more estimates of the one or more future SDUs. The one or more estimates may include an estimated arrival time of the one or more future SDUs and an estimated size of the one or more future SDUs.

[0157] At 1506, at least one first SDU may arrive at a modem of the UE at a first arrival time. In one aspect, the arrival of the SDU into an empty buffer of the modem may trigger the sending of the SR and the BSR. For example, at 1406, UE 1402, at least one first SDU may arrive at a modem of the UE 1402 at a first arrival time. Further, 1506 may be performed by the BSR component 198.

[0158] At 1508, the UE may obtain an estimate of a second SDU based on at least one first SDU having a first arrival time at a modem of the UE, the estimate of the second SDU including a second arrival time at the modem of the UE, the second arrival time being after the first arrival time. The estimate of the second SDU may be performed by an application or a modem of the UE. For example, at 1408, the UE 1402 may obtain an estimate of a second SDU based on at least one first SDU having a first arrival time at the modem of the UE 1402, the estimate of the second SDU including a second arrival time at the modem of the UE 1402, the second arrival time being after the first arrival time. Furthermore, 1508 may be performed by the BSR component 198.

[0159] In one aspect, the estimation may be based on a configuration or an AI / ML model. In one aspect, the estimation may be configured for the UE. In one example, based on a category or at least one attribute of the first SDU, an application or modem of the UE may be configured to estimate an arrival time and / or size of a second SDU based on the first SDU. In another example, an application or modem of the UE may include an AI / ML model for estimating future SDUs, and the application or modem of the UE may use the AI / ML model to estimate an arrival time and / or size of a second SDU based on the first SDU.

[0160] In another aspect, the estimation of the arrival time of the second SDU may include an estimation of jitter associated with the second SDU. That is, the UE may be configured to estimate the jitter associated with the second SDU and determine the arrival time of the second SDU taking into account the estimated jitter. Based on the estimated arrival time of the second SDU, the UE may schedule or configure the target PUSCH to send a PDU including the data in the second SDU via the target PUSCH.

[0161] The estimation of the second SDU may further include an estimated size of the second SDU based on the size of at least one first SDU. That is, in addition to the arrival time, the size of the second SDU may be estimated. That is, based on the size of the first SDU received in the buffer of the modem, the modem may estimate the size of the second SDU to be received from the application. In addition, based on the size of the SDU sent to the modem, the application may estimate the size of the second SDU to be sent to the modem.

[0162] At 1510, the UE may obtain an SR pattern and a first estimate of a delay between an SR associated with a second BSR and an uplink grant following the SR associated with the second BSR. In one aspect, the delay or latency between the arrival of the first SDU at the modem of the UE and the transmission of the first BSR and / or the first PDU may include a first latency component between the arrival time of the first SDU and the first available SR opportunity, and a second latency component between the first available SR opportunity and the transmission of the first BSR and / or the first PDU. Information associated with the second latency component of the latency may include an SR pattern and / or a delay of the SR to UL grant. Based on the SR pattern and / or the delay of the SR to UL grant, the application may align the second SDU as close as the PUSCH to reduce latency. Based on the estimate of the arrival time of the second SDU, the BSR may be triggered so that the modem may send the SR at the nearest opportunity before the arrival time of the second SDU in the buffer. For example, the UE may obtain an SR pattern and a first estimate of a delay between an SR associated with the second BSR and an uplink grant following the SR associated with the second BSR. Additionally, 1510 may be performed by the BSR component 198 .

[0163] At 1512, the UE may align the second arrival time based on the SR mode and the first estimate of the delay. In some aspects, the modem of the UE may instruct (or configure) the application of the UE to align the SDU service based on the estimate of the second SDU. Here, the modem may report timing information to the application via a cross-layer API, the timing information including the SR mode and / or the delay between the SR and the UE grant. The application may align the delivery of future SDUs based on the timing information received from the modem to reduce latency. For example, the time at which the modem constructs a MAC PDU of the second PDU based on the second SDU may be considered to align the delivery of future SDUs (e.g., the second SDU). For example, at 1412, the UE 1402 may align the second arrival time based on the SR mode and the first estimate of the delay. In addition, 1512 may be performed by the BSR component 198.

[0164] The modem of the UE may report information associated with the second delay component of the delay to the application and instruct the application to align the second SDU to reduce the delay. Here, the information associated with the second delay component of the delay may include the SR mode and / or the delay of the SR to UL grant. Based on the SR mode and / or the delay of the SR to UL grant 713, the application may align the second SDU to be as close as the PUSCH to reduce the delay. Based on the estimate of the arrival time of the next SDU (e.g., the second SDU), the BSR may be triggered so that the modem can send the second SR at the closest opportunity before the arrival time of SDU2 714 in the buffer.

[0165] In some aspects, multiple SDUs may be delivered by an application of the UE to a modem of the UE between two consecutive SR opportunities. For example, a first SDU and a third SDU may arrive in a buffer of the modem of the UE, and the UE may estimate a future second SDU and a fourth SDU based on the first SDU and the third SDU. Here, the second SDU and the fourth SDU may be associated with the same data stream or different data streams.

[0166] At 1514, the UE may obtain a fourth estimate of a fourth SDU based on a third SDU having a third arrival time at the UE's modem, the fourth estimate including a fourth arrival time at which the fourth SDU is estimated to arrive at the UE's modem after the third arrival time, and the second SDU is different from the fourth SDU. The estimate of the second SDU may be performed by an application or modem of the UE. The estimate may be based on a configuration or an AI / ML model. In one aspect, the estimate may be configured for the UE. Here, the second SDU and the fourth SDU may be associated with different streams. The estimate of the fourth SDU may also include an estimated size of the fourth SDU based on the size of the third SDU. For example, at 1514, the UE may obtain a fourth estimate of the fourth SDU based on a third SDU having a third arrival time at the UE's modem, the fourth estimate including a fourth arrival time at which the fourth SDU is estimated to arrive at the UE's modem after the third arrival time, and the second SDU is different from the fourth SDU. In addition, 1514 may be performed by the BSR component 198.

[0167] At 1516, the UE may initiate transmission of a second BSR for the second SDU based on the estimation of the second SDU. In one aspect, the transmission of the second BSR is initiated based on not receiving an uplink grant after the second arrival time and before a subsequent SR opportunity. In one aspect, the SDU of the UE may arrive in a buffer of the modem of the UE after the SR opportunity and eventually wait or suspend transmission of the SDU until the next SR opportunity. For example, at 1416, the UE 1402 may initiate transmission of a second BSR for the second SDU based on the estimation of the second SDU. In addition, 1516 may be performed by the BSR component 198.

[0168] At 1518, the UE may send an SR before the second arrival time. Here, based on the estimate of the second SDU, the UE may send an SR to request an UL grant for transmitting a second BSR to the network node. The network node may send an UL grant to the UE based on the SR received at the SR opportunity, the UL grant indicating UL resources for the UE to send a second BSR, the second BSR indicating an estimate of the second SDU. Based on the SR, the network node may send an UL grant dedicated to sending the second BSR. For example, the UE may send the SR before the second arrival time. In addition, 1518 may be performed by the BSR component 198.

[0169] At 1520, the UE may receive an uplink grant based on the SR. That is, the network node may configure a grant of the UL configuration for the UE, and the grant of the UL configuration may indicate a scheduling plan for an UL time slot for the UE to send a second BSR based on an estimate of the second SDU. In one example, the uplink grant may be a configuration of at least one dedicated configured grant for sending a second BSR for the second SDU based on an estimate of the second SDU. In another example, the second BSR may be sent based on the uplink grant before the second arrival time. For example, at 1420, the UE 1402 may receive an uplink grant based on the SR. In addition, 1520 may be performed by the BSR component 198.

[0170] At 1522, the UE may send a second BSR to the network node. For example, the UE may send a second BSR to the network node. Additionally, 1522 may be performed by BSR component 198.

[0171] At 1524, the UE may send a second PDU via the target PUSCH based on the second BSR. In one aspect, a fourth BSR for a fourth SDU based on the fourth estimate may be sent with the second PDU, the fourth BSR being included in the second target PUSCH to send the second SDU based on the second BSR. In one aspect, the fourth BSR for the fourth SDU is based on the fourth estimate, the fourth BSR being included in the second target PUSCH to send the second SDU based on the second BSR. For example, at 1524, the UE 1402 may send a second PDU via the target PUSCH based on the second BSR. Further, 1524 may be performed by the BSR component 198.

[0172] Fig.16 1600 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104 / 402 / 502 / 602 / 702 / 802 / 902 / 1002 / 1102 / 1202 / 1302 / 1402; apparatus 1904). The UE may be configured to obtain one or more estimates of one or more future SDUs based on one or more past SDUs, and to initiate transmission of one or more BSRs for the one or more future SDUs based on the one or more estimates of the one or more future SDUs. The one or more estimates may include an estimated arrival time of the one or more future SDUs and an estimated size of the one or more future SDUs.

[0173] At 1608, the UE may obtain an estimate of a second SDU based on at least one first SDU having a first arrival time at a modem of the UE, the estimate of the second SDU including a second arrival time at the modem of the UE, the second arrival time being after the first arrival time. The estimate of the second SDU may be performed by an application or a modem of the UE. For example, at 1408, the UE 1402 may obtain an estimate of a second SDU based on at least one first SDU having a first arrival time at the modem of the UE 1402, the estimate of the second SDU including a second arrival time at the modem of the UE 1402, the second arrival time being after the first arrival time. Furthermore, 1608 may be performed by the BSR component 198.

[0174] In one aspect, the estimation may be based on a configuration or an AI / ML model. In one aspect, the estimation may be configured for the UE. In one example, based on a category or at least one attribute of the first SDU, an application or modem of the UE may be configured to estimate an arrival time and / or size of a second SDU based on the first SDU. In another example, an application or modem of the UE may include an AI / ML model for estimating future SDUs, and the application or modem of the UE may use the AI / ML model to estimate an arrival time and / or size of a second SDU based on the first SDU.

[0175] In another aspect, the estimation of the arrival time of the second SDU may include an estimation of jitter associated with the second SDU. That is, the UE may be configured to estimate the jitter associated with the second SDU and determine the arrival time of the second SDU taking into account the estimated jitter. Based on the estimated arrival time of the second SDU, the UE may schedule or configure the target PUSCH to send a PDU including the data in the second SDU via the target PUSCH.

[0176] The estimation of the second SDU may further include an estimated size of the second SDU based on the size of at least one first SDU. That is, in addition to the arrival time, the size of the second SDU may be estimated. That is, based on the size of the first SDU received in the buffer of the modem, the modem may estimate the size of the second SDU to be received from the application. In addition, based on the size of the SDU sent to the modem, the application may estimate the size of the second SDU to be sent to the modem.

[0177] At 1616, the UE may initiate transmission of a second BSR for the second SDU based on the estimation of the second SDU. In one aspect, the transmission of the second BSR is initiated based on not receiving an uplink grant after the second arrival time and before a subsequent SR opportunity. In one aspect, the SDU of the UE may arrive in a buffer of the modem of the UE after the SR opportunity and eventually wait or suspend transmission of the SDU until the next SR opportunity. For example, at 1416, the UE 1402 may initiate transmission of a second BSR for the second SDU based on the estimation of the second SDU. In addition, 1616 may be performed by the BSR component 198.

[0178] Fig.17 1700 is a flow chart of a method of wireless communication. The method may be performed by a network node (e.g., base station 102; network node 1404; network entity 2002). Based on the BSR, the network node may configure an UL grant for the UE to send one or more BSRs and one or more PDUs carrying data of one or more SDUs.

[0179] At 1718, the network node may receive the SR before the second arrival time. Here, based on the estimate of the second SDU, the UE may send the SR to request an UL grant for transmitting a second BSR to the network node. The network node may send an UL grant to the UE based on the SR received at the SR opportunity, the UL grant indicating UL resources for the UE to use to send the second BSR, the second BSR indicating the estimate of the second SDU. Based on the SR, the network node may send an UL grant dedicated to sending the second BSR. For example, the network node may receive the SR before the second arrival time. In addition, 1718 may be performed by the UL grant component 199.

[0180] At 1720, the network node may send an uplink grant based on the SR. The network node may configure a UL configured grant that may be dedicated to sending a second BSR. That is, the network node may configure a UL configured grant for the UE, and the UL configured grant may indicate a scheduling plan for a UL time slot for the UE to send a second BSR based on an estimate of the second SDU. In one example, the uplink grant may be a configuration of at least one dedicated configured grant for sending a second BSR for a second SDU based on an estimate of the second SDU. In another example, the second BSR may be sent based on the uplink grant before the second arrival time. For example, at 1420, the network node may send an uplink grant based on the SR. In addition, 1720 may be performed by the UL grant component 199.

[0181] At 1722, the network node may receive from the UE at least one BSR indicating at least one target PUSCH, the at least one BSR comprising a second BSR based on an estimate of a second SDU, the estimate of the second SDU comprising a second arrival time of the second SDU at a modem of the UE, the estimate of the second SDU being based on at least one first SDU having a first arrival time at the modem of the UE, the second arrival time being after the first arrival time. For example, at 1422, the network node 1404 may receive from the UE 1402 at least one BSR indicating at least one target PUSCH, the at least one BSR comprising a second BSR based on an estimate of the second SDU, the estimate of the second SDU comprising a second arrival time of the second SDU at the modem of the UE 1402. Furthermore, 1722 may be performed by the UL grant component 199.

[0182] The second BSR may include or indicate at least one of a size (eg, estimated size) of the second SDU or a time slot for transmitting a target PUSCH including data of the second SDU based on an estimated arrival time of the second SDU.

[0183] In one aspect, a second BSR for a second SDU may be sent via a grant of the uplink configuration based on the second SDU not being received at the modem of the UE before the grant of the uplink configuration; and a second BSR for the second SDU may be sent via a grant of the uplink configuration based on the second SDU not being received at the modem of the UE before the grant of the uplink configuration. That is, if the second SDU has not yet arrived in the buffer, the UE may send a second BSR with a dedicated format to report the expected size of the second BSR (if available) and the time at which a target PUSCH may be sent to deliver the second BSR of the second SDU and / or the second PDU. In another aspect, the second BSR may be sent in a PUSCH in which at least one first SDU is sent.

[0184] Based on the second BSR including or indicating at least one of the size (e.g., estimated size) of the second SDU or the time slot of the target PUSCH for sending data including the second SDU, the network node may send an UL grant to configure the target PUSCH for the UE to use to send a second PDU carrying data of the second SDU.

[0185] The second BSR for the second SDU may include an indication of a plurality of target PUSCHs, and wherein the second SDU is transmitted in at least one of the plurality of target PUSCHs. In one aspect, based on the plurality of SDUs that may be delivered by an application of the UE to a modem of the UE between two consecutive SR opportunities, the second BSR may include an indication of the plurality of target PUSCHs. In one example, the second BSR may include an estimate of the second SDU and the fourth SDU.

[0186] In another example, the BSR may include an indication of an estimate about the second SDU, and the indication of an estimate about the fourth SDU may be sent with a second PDU based on the second SDU. Based on indicating the estimate about the fourth SDU with the second PDU, the second BSR may indicate the size of the fourth BSR to be included in the second target PUSCH. That is, the second BSR may indicate the size of the second SDU and the size of the fourth BSR, and the network node may send an UL grant to schedule the second PDU for sending the second SDU and the second target PUSCH of the fourth BSR associated with the fourth SDU.

[0187] At 1724, the network node may receive the second SDU in at least one target PUSCH. In one aspect, a fourth BSR for a fourth SDU based on the fourth estimate may be sent with the second PDU, the fourth BSR being included in the second target PUSCH to send the second SDU based on the second BSR. In one aspect, the fourth BSR for the fourth SDU is based on the fourth estimate, the fourth BSR being included in the second target PUSCH to send the second SDU based on the second BSR. For example, at 1424, the network node 1404 may receive the second SDU in at least one target PUSCH. Furthermore, 1724 may be performed by the UL grant component 199.

[0188] Based on the BSR, the network node may configure an UL grant for the UE to use to send one or more BSRs and one or more PDUs carrying data of one or more SDUs.

[0189] Fig.18 1800 is a flow chart of a method of wireless communication. The method may be performed by a network node (e.g., base station 102; network node 1404; network entity 2002). Based on the BSR, the network node may configure an UL grant for the UE to send one or more BSRs and one or more PDUs carrying data of one or more SDUs.

[0190] At 1818, the network node may receive the SR before the second arrival time. Here, based on the estimate of the second SDU, the UE may send the SR to request an UL grant for transmitting a second BSR to the network node. The network node may send an UL grant to the UE based on the SR received at the SR opportunity, the UL grant indicating UL resources for the UE to use to send the second BSR, the second BSR indicating the estimate of the second SDU. Based on the SR, the network node may send an UL grant dedicated to sending the second BSR. For example, the network node may receive the SR before the second arrival time. In addition, 1818 may be performed by the UL grant component 199.

[0191] At 1820, the network node may send an uplink grant based on the SR. The network node may configure a UL configured grant that may be dedicated to sending a second BSR. That is, the network node may configure a UL configured grant for the UE, and the UL configured grant may indicate a scheduling plan for a UL time slot for the UE to send a second BSR based on an estimate of the second SDU. In one example, the uplink grant may be a configuration of at least one dedicated configured grant for sending a second BSR for a second SDU based on an estimate of the second SDU. In another example, the second BSR may be sent based on the uplink grant before the second arrival time. For example, at 1420, the network node may send an uplink grant based on the SR. In addition, 1820 may be performed by the UL grant component 199.

[0192] At 1822, the network node may receive from the UE at least one BSR indicating at least one target PUSCH, the at least one BSR including a second BSR based on an estimate of a second SDU, the estimate of the second SDU including a second arrival time of the second SDU at a modem of the UE, the estimate of the second SDU based on at least one first SDU having a first arrival time at the modem of the UE, the second arrival time being after the first arrival time. For example, at 1422, the network node 1404 may receive from the UE 1402 at least one BSR indicating at least one target PUSCH, the at least one BSR including a second BSR based on an estimate of the second SDU, the estimate of the second SDU including a second arrival time of the second SDU at the modem of the UE 1402. Furthermore, 1822 may be performed by the UL grant component 199.

[0193] The second BSR may include or indicate at least one of a size (eg, estimated size) of the second SDU or a time slot for transmitting a target PUSCH including data of the second SDU based on an estimated arrival time of the second SDU.

[0194] In one aspect, a second BSR for a second SDU may be sent via a grant of the uplink configuration based on the second SDU not being received at the modem of the UE before the grant of the uplink configuration; and a second BSR for the second SDU may be sent via a grant of the uplink configuration based on the second SDU not being received at the modem of the UE before the grant of the uplink configuration. That is, if the second SDU has not yet arrived in the buffer, the UE may send a second BSR with a dedicated format to report the expected size of the second BSR (if available) and the time at which a target PUSCH may be sent to deliver the second BSR of the second SDU and / or the second PDU. In another aspect, the second BSR may be sent in a PUSCH in which at least one first SDU is sent.

[0195] Based on the second BSR including or indicating at least one of the size (e.g., estimated size) of the second SDU or the time slot of the target PUSCH for sending data including the second SDU, the network node may send an UL grant to configure the target PUSCH for the UE to use to send a second PDU carrying data of the second SDU.

[0196] The second BSR for the second SDU may include an indication of a plurality of target PUSCHs, and wherein the second SDU is transmitted in at least one of the plurality of target PUSCHs. In one aspect, based on the plurality of SDUs that may be delivered by an application of the UE to a modem of the UE between two consecutive SR opportunities, the second BSR may include an indication of the plurality of target PUSCHs. In one example, the second BSR may include an estimate of the second SDU and the fourth SDU.

[0197] In another example, the BSR may include an indication of an estimate about the second SDU, and the indication of an estimate about the fourth SDU may be sent with a second PDU based on the second SDU. Based on indicating the estimate about the fourth SDU with the second PDU, the second BSR may indicate the size of the fourth BSR to be included in the second target PUSCH. That is, the second BSR may indicate the size of the second SDU and the size of the fourth BSR, and the network node may send an UL grant to schedule the second PDU for sending the second SDU and the second target PUSCH of the fourth BSR associated with the fourth SDU.

[0198] Fig.191900 is a diagram illustrating an example of a hardware implementation for an apparatus 1904. The apparatus 1904 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus 1904 may include a cellular baseband processor 1924 (also referred to as a modem) coupled to one or more transceivers 1922 (e.g., a cellular RF transceiver). The cellular baseband processor 1924 may include on-chip memory 1924'. In some aspects, the apparatus 1904 may also include one or more subscriber identity module (SIM) cards 1920 and an application processor 1906 coupled to a secure digital (SD) card 1908 and a screen 1910. The application processor 1906 may include on-chip memory 1906'. In some aspects, the device 1904 may also include a Bluetooth module 1912, a WLAN module 1914, an SPS module 1916 (e.g., a GNSS module), one or more sensor modules 1918 (e.g., an atmospheric pressure sensor / altimeter; a motion sensor such as an inertial measurement unit (IMU), a gyroscope, and / or an accelerometer; light detection and ranging (LIDAR), radio-aided detection and ranging (RADAR), sound navigation and ranging (SONAR), a magnetometer, audio, and / or other technologies for positioning), an additional memory module 1926, a power source 1930, and / or a camera 1932. The Bluetooth module 1912, the WLAN module 1914, and the SPS module 1916 may include an on-chip transceiver (TRX) (or, in some cases, only a receiver (RX)). The Bluetooth module 1912, the WLAN module 1914, and the SPS module 1916 may include their own dedicated antennas and / or communicate using an antenna 1980. The cellular baseband processor 1924 communicates with the UE 104 and / or the RU associated with the network entity 1902 through the transceiver 1922 via one or more antennas 1980. The cellular baseband processor 1924 and the application processor 1906 may each include a computer-readable medium / memory 1924', 1906', respectively. The additional memory module 1926 may also be considered as a computer-readable medium / memory. Each computer-readable medium / memory 1924', 1906', 1926 may be non-transitory. The cellular baseband processor 1924 and the application processor 1906 are each responsible for general processing, including executing software stored on a computer-readable medium / memory. The software enables the cellular baseband processor 1924 / application processor 1906 to perform the various functions described above when executed by the cellular baseband processor 1924 / application processor 1906. The computer-readable medium / memory can also be used to store data manipulated by the cellular baseband processor 1924 / application processor 1906 when executing the software.The cellular baseband processor 1924 / application processor 1906 may be a component of the UE 350 and may include the memory 360 and / or at least one of the TX processor 368, the RX processor 356, and the controller / processor 359. In one configuration, the device 1904 may be a processor chip (modem and / or application) and include only the cellular baseband processor 1924 and / or the application processor 1906, while in another configuration, the device 1904 may be the entire UE (e.g., see. Figure 3 350) and includes additional modules of device 1904.

[0199] As described above, component 198 is configured to: obtain an estimate of a second SDU based on at least one first SDU having a first arrival time at the UE's modem, the estimate of the second SDU including a second arrival time at the UE's modem, the second arrival time being after the first arrival time; and initiate transmission of a second BSR for the second SDU based on the estimate of the second SDU. Component 198 may be within the cellular baseband processor 1924, the application processor 1906, or within both the cellular baseband processor 1924 and the application processor 1906. Component 198 may be one or more hardware components specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. As shown, the device 1904 may include a variety of components configured for various functions. In one configuration, the apparatus 1904 (specifically, the cellular baseband processor 1924 and / or the application processor 1906) includes: a component for obtaining an estimate of a second SDU based on at least one first SDU having a first arrival time at a modem of the UE, the estimate of the second SDU including a second arrival time at the modem of the UE, the second arrival time being after the first arrival time; and a component for initiating transmission of a second BSR for the second SDU based on the estimate of the second SDU. In one configuration, the estimate of the second SDU also includes an estimated size of the second SDU based on a size of the at least one first SDU. In one configuration, the transmission of the second BSR is initiated based on not receiving an uplink grant after the second arrival time and before a subsequent SR opportunity. In one configuration, the apparatus 1904 (specifically, the cellular baseband processor 1924 and / or the application processor 1906) also includes a component for receiving a configuration of at least one specifically configured grant for transmitting a second BSR for the second SDU based on the estimate of the second SDU. In one configuration, the apparatus 1904 (specifically, the cellular baseband processor 1924 and / or the application processor 1906) further includes a component for obtaining an SR pattern and a first estimate of a delay between an SR associated with the BSR and an uplink grant following the SR associated with the BSR. In one configuration, the apparatus 1904 (specifically, the cellular baseband processor 1924 and / or the application processor 1906) further includes a component for aligning a second arrival time based on the SR pattern and the first estimate of the delay. In one configuration, the SR associated with the BSR is sent in an available SR opportunity closest to the second arrival time and before the second arrival time. In one configuration, the BSR indicates a transmission time of a target PUSCH for sending the second SDU.In one configuration, the device 1904 (specifically, the cellular baseband processor 1924 and / or the application processor 1906) also includes: a component for sending an SR before a second arrival time; and a component for receiving an uplink grant based on the SR, wherein a second BSR is sent based on the uplink grant before the second arrival time. In one configuration, the transmission time of the target PUSCH is indicated with reference to the transmission of the BSR. In one configuration, the BSR indicates an estimated size of a second SDU based on at least one first SDU. In one configuration, the device 1904 (specifically, the cellular baseband processor 1924 and / or the application processor 1906) also includes a component for obtaining a fourth estimate of a fourth SDU based on a third SDU having a third arrival time at a modem of the UE, the fourth estimate including a fourth arrival time at which the fourth SDU is estimated to arrive at the modem of the UE after the third arrival time, and the second SDU is different from the fourth SDU. In one configuration, the second BSR indicates the second arrival time and the fourth arrival time. In one configuration, the second BSR also indicates at least one of a second estimated size of the second SDU based on the at least one first SDU or a fourth estimated size of the fourth SDU based on the third SDU. In one configuration, the second SDU and the fourth SDU are associated with different streams. In one configuration, the device 1904 (specifically, the cellular baseband processor 1924 and / or the application processor 1906) also includes a component for determining a fourth BSR for the fourth SDU based on the fourth estimate, and the fourth BSR is included in the second target PUSCH to send the second SDU based on the second BSR. In one configuration, the second BSR indicates the size of the fourth BSR to be included in the second target PUSCH. In one configuration, the second BSR is sent in the PUSCH in which the at least one first SDU is sent. In one configuration, based on the second SDU not being received at the modem of the UE before the grant of the uplink configuration, the second BSR of the second SDU is sent via the grant of the uplink configuration, and the second SDU is sent in the second target PUSCH indicated by the second BSR. In one configuration, the second BSR of the second SDU includes an indication of a plurality of target PUSCHs, and wherein the second SDU is transmitted in at least one of the plurality of target PUSCHs. The means may be a component 198 of the apparatus 1904 configured to perform the functions recited by the means. As described above, the apparatus 1904 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Thus, in one configuration, the means may be a TX processor 368, an RX processor 356, and / or a controller / processor 359 configured to perform the functions recited by the means.

[0200] Fig. 202000 is a diagram illustrating an example of a hardware implementation for a network entity 2002. The network entity 2002 may be a BS, a component of a BS, or may implement BS functionality. The network entity 2002 may include at least one of a CU 2010, a DU 2030, or a RU 2040. For example, depending on the layer functionality handled by the component 199, the network entity 2002 may include a CU 2010; both a CU 2010 and a DU 2030; each of the CU 2010, the DU 2030, and the RU 2040; the DU 2030; both a DU 2030 and a RU 2040; or a RU 2040. The CU 2010 may include a CU processor 2012. The CU processor 2012 may include an on-chip memory 2012'. In some aspects, the CU 2010 may also include an additional memory module 2014 and a communication interface 2018. CU 2010 communicates with DU 2030 via a midhaul link, such as an F1 interface. DU 2030 may include a DU processor 2032. DU processor 2032 may include on-chip memory 2032'. In some aspects, DU 2030 may also include an additional memory module 2034 and a communication interface 2038. DU 2030 communicates with RU 2040 via a fronthaul link. RU 2040 may include a RU processor 2042. RU processor 2042 may include on-chip memory 2042'. In some aspects, RU 2040 may also include an additional memory module 2044, one or more transceivers 2046, an antenna 2080, and a communication interface 2048. RU 2040 communicates with UE 104. On-chip memory 2012', 2032', 2042' and additional memory modules 2014, 2034, 2044 may each be considered a computer-readable medium / memory. Each computer readable medium / memory may be non-transitory. Each of the processors 2012, 2032, 2042 is responsible for general processing, including executing software stored on the computer readable medium / memory. The software, when executed by the corresponding processor, causes the processor to perform the various functions described above. The computer readable medium / memory may also be used to store data manipulated by the processor when executing the software.

[0201] As described above, component 199 is configured to: receive from the UE at least one BSR indicating at least one target PUSCH, the at least one BSR including a second BSR based on an estimate of a second SDU, the estimate of the second SDU including a second arrival time of the second SDU at the UE's modem, the estimate of the second SDU based on at least one first SDU having a first arrival time at the UE's modem, the second arrival time being after the first arrival time; send at least one uplink grant of at least one target PUSCH based on the at least one BSR indicating the at least one target PUSCH; and receive the second SDU in the at least one target PUSCH. Component 199 may be within one or more processors of one or more of CU 2010, DU 2030, and RU 2040. Component 199 may be one or more hardware components specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. Network entity 2002 may include a variety of components configured for various functions. In one configuration, the network entity 2002 includes: means for receiving at least one BSR indicating at least one targeted PUSCH from a UE, the at least one BSR including a second BSR based on an estimate of a second SDU, the estimate of the second SDU including a second arrival time of the second SDU at a modem of the UE, the estimate of the second SDU being based on at least one first SDU having a first arrival time at the modem of the UE, the second arrival time being after the first arrival time; means for sending at least one uplink grant for the at least one targeted PUSCH based on the at least one BSR indicating the at least one targeted PUSCH; and means for receiving the second SDU in the at least one targeted PUSCH. In one configuration, the estimate of the second SDU also includes an estimated size of the second SDU based on a size of the at least one first SDU. In one configuration, the network entity 2002 also includes means for sending at least one specifically configured grant for sending the second BSR for sending the second SDU based on the estimate of the second SDU. In one configuration, the BSR indicates a transmission time of the at least one targeted PUSCH for sending the second SDU. In one configuration, the network entity 2002 further comprises: means for receiving the SR before the second arrival time; and means for sending an uplink grant based on the SR, wherein the second BSR is received based on the uplink grant before the second arrival time. In one configuration, the transmission time of the target PUSCH is indicated with reference to the transmission of the BSR. In one configuration, the BSR indicates an estimated size of the second SDU based on the at least one first SDU.In one configuration, the network entity 2002 further comprises means for receiving a fourth BSR for a fourth SDU from the UE, the fourth BSR being based on an estimate of the fourth SDU, the estimate comprising a fourth arrival time of the fourth SDU at the modem of the UE, wherein the estimate of the fourth SDU is based on at least one third SDU having a third arrival time at the modem of the UE, the fourth arrival time being after the third arrival time, and based on the fourth estimate, the fourth BSR is included in a second target PUSCH of the at least one target PUSCH to transmit a second SDU based on the second BSR, and the second SDU is different from the fourth SDU. The means may be a component 199 of the network entity 2002 configured to perform the functions recited by the means. As described above, the network entity 2002 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Thus, in one configuration, the means may be a TX processor 316, an RX processor 370, and / or a controller / processor 375 configured to perform the functions recited by the means.

[0202] In some aspects of the present disclosure, the UE may obtain an estimate of a second SDU based on at least one first SDU having a first arrival time at the UE's modem, the estimate of the second SDU including a second arrival time at the UE's modem, the second arrival time being after the first arrival time; and initiate sending a second BSR of the second SDU based on the estimate of the second SDU.

[0203] The network node may receive at least one BSR indicating at least one target PUSCH from the UE, the at least one BSR including a second BSR based on an estimate of the second SDU, the estimate of the second SDU including a second arrival time of the second SDU at the UE's modem, the estimate of the second SDU being based on at least one first SDU having a first arrival time at the UE's modem, the second arrival time being after the first arrival time; send at least one uplink grant of the at least one target PUSCH based on the at least one BSR indicating the at least one target PUSCH; and receive the second SDU in the at least one target PUSCH.

[0204] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is only an illustration of the exemplary method. It should be understood that the specific order or hierarchy of the blocks in the process / flowchart can be rearranged based on design preferences. In addition, some blocks can be combined or omitted. The attached method claims provide the elements of each block in a sample order, but are not limited to the specific order or hierarchy provided.

[0205] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects. Therefore, the claims are not limited to the various aspects described herein, but should be given the full scope consistent with the language claims. Unless otherwise specified, reference to an element in the singular form does not mean "one and only one", but "one or more". Terms such as "if", "when ..." and "at ..." do not mean a direct temporal relationship or reaction. That is, these phrases, such as "when ...", do not mean an instant action in response to the occurrence of an action or during the occurrence of an action, but only mean that if the condition is met, the action will occur without a specific or instantaneous time constraint to make the action occur. The word "exemplary" is used herein to mean "used as an example, instance, or illustration". Any aspect described as "exemplary" herein is not necessarily interpreted as being preferred or having an advantage over other aspects. Unless otherwise specified, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B, and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may contain one or more members of A, B, or C. A set should be interpreted as a set of elements, where the number of elements is one or more. Thus, for a set of X, X will include one or more elements. If the first device receives data from the second device or sends data to the second device, data may be directly received / sent between the first device and the second device, or indirectly received / sent between the first device and the second device through a collection of devices. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure that are known or will later be known to a person of ordinary skill in the art are expressly incorporated herein by reference and are covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly stated in the claims. Words such as "module", "mechanism", "element", "device", etc. cannot replace the word "component". Therefore, no claim element will be understood as a component plus function unless the element is explicitly stated using the phrase "component for..."

[0206] As used herein, the phrase "based on" should not be interpreted as referring to a closed set of information, one or more conditions, one or more factors, etc. In other words, the phrase "based on A" (where "A" can be information, a condition, a factor, etc.) should be interpreted as "based at least on A" unless specifically stated differently.

[0207] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0208] Aspect 1 is a method for performing wireless communication at a UE, the method comprising: obtaining an estimate of a second SDU based on at least one first SDU having a first arrival time at a modem of the UE, the estimate of the second SDU comprising a second arrival time at the modem of the UE, the second arrival time being after the first arrival time; and initiating sending of a second BSR of the second SDU based on the estimate of the second SDU.

[0209] Aspect 2 is a method according to aspect 1, wherein the estimation of the second SDU also includes an estimated size of the second SDU based on the size of the at least one first SDU.

[0210] Aspect 3 is a method according to any one of aspects 1 and 2, wherein the sending of the second BSR is initiated based on not receiving an uplink grant after the second arrival time and before a subsequent SR opportunity.

[0211] Aspect 4 is a method according to any one of aspects 1 to 3, the method further comprising: receiving a configuration of a grant of at least one dedicated configuration for sending the second BSR of the second SDU based on the estimation of the second SDU.

[0212] Aspect 5 is a method according to any one of aspects 1 to 3, the method further comprising: obtaining an SR pattern and a first estimate of a delay between an SR associated with the BSR and an uplink grant following the SR associated with the BSR.

[0213] Aspect 6 is a method according to aspect 5, the method further comprising: aligning the second arrival time based on the SR pattern and the first estimate of the delay.

[0214] Aspect 7 is a method according to any one of aspects 5 and 6, wherein the SR associated with the BSR is sent in an available SR opportunity closest to the second arrival time and before the second arrival time.

[0215] Aspect 8 is a method according to any one of aspects 1 to 3, wherein the BSR indicates a sending time of the target PUSCH to send the second SDU.

[0216] Aspect 9 is a method according to aspect 8, wherein the method further includes: sending an SR before the second arrival time; and receiving an uplink grant based on the SR, wherein the second BSR is sent based on the uplink grant before the second arrival time.

[0217] Aspect 10 is a method according to any one of aspects 8 and 9, wherein the transmission time of the target PUSCH is indicated with reference to the transmission of the BSR.

[0218] Aspect 11 is a method according to any one of aspects 8 to 10, wherein the BSR indicates an estimated size of the second SDU based on the at least one first SDU.

[0219] Aspect 12 is a method according to any one of Aspects 1 to 3, the method further comprising: obtaining a fourth estimate of a fourth SDU based on a third SDU having a third arrival time at a modem of the UE, the fourth estimate including a fourth arrival time at which the fourth SDU is estimated to arrive at the modem of the UE after the third arrival time, and the second SDU is different from the fourth SDU.

[0220] Aspect 13 is a method according to aspect 12, wherein the second BSR indicates the second arrival time and the fourth arrival time.

[0221] Aspect 14 is a method according to any one of aspects 12 and 13, wherein the second BSR further indicates at least one of a second estimated size of the second SDU based on the at least one first SDU or a fourth estimated size of the fourth SDU based on the third SDU.

[0222] Aspect 15 is a method according to any one of aspects 12 to 14, wherein the second SDU and the fourth SDU are associated with different flows.

[0223] Aspect 16 is a method according to any one of aspects 12 to 15, the method also including: sending a fourth BSR of the fourth SDU based on the fourth estimate, the fourth BSR being included in a second target PUSCH to send the second SDU based on the second BSR.

[0224] Aspect 17 is a method according to aspect 16, wherein the second BSR indicates a size of the fourth BSR to be included in the second target PUSCH.

[0225] Aspect 18 is a method according to any one of aspects 1 to 17, wherein the second BSR is sent in a PUSCH in which the at least one first SDU is sent.

[0226] Aspect 19 is a method according to any one of Aspects 1 to 18, wherein the second BSR of the second SDU is sent via the grant of the uplink configuration based on the fact that the second SDU was not received at the modem of the UE before the grant of the uplink configuration, and the second SDU is sent in a second target PUSCH indicated by the second BSR.

[0227] Aspect 20 is a method according to any one of aspects 1 to 19, wherein the second BSR of the second SDU includes an indication of multiple target PUSCHs, and wherein the second SDU is sent in at least one target PUSCH among the multiple target PUSCHs.

[0228] Aspect 21 is an apparatus for wireless communication, the apparatus comprising at least one processor coupled to a memory and configured to implement any one of aspects 1 to 20, the apparatus further comprising a transceiver coupled to the at least one processor.

[0229] Aspect 22 is an apparatus for wireless communication, the apparatus comprising means for implementing any one of aspects 1 to 20.

[0230] Aspect 23 is a non-transitory computer readable medium storing computer executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 1 to 20.

[0231] Aspect 24 is a method for performing wireless communications at a network node, the method comprising: receiving at least one BSR indicating at least one target PUSCH from a UE, the at least one BSR comprising a second BSR based on an estimate of a second SDU, the estimate of the second SDU comprising a second arrival time of the second SDU at a modem of the UE, the estimate of the second SDU being based on at least one first SDU having a first arrival time at the modem of the UE, the second arrival time being after the first arrival time; sending at least one uplink grant of the at least one target PUSCH based on the at least one BSR indicating the at least one target PUSCH; and receiving the second SDU in the at least one target PUSCH.

[0232] Aspect 25 is a method according to aspect 24, wherein the estimation of the second SDU further comprises an estimated size of the second SDU based on a size of the at least one first SDU.

[0233] Aspect 26 is a method according to any one of aspects 24 and 25, the method further comprising: sending a configuration of a grant of at least one dedicated configuration for sending the second BSR of the second SDU based on the estimation of the second SDU.

[0234] Aspect 27 is a method according to any one of aspects 24 to 26, wherein the BSR indicates a transmission time at which the at least one target PUSCH transmits the second SDU.

[0235] Aspect 28 is a method according to aspect 27, the method further comprising: receiving an SR before the second arrival time; and sending an uplink grant based on the SR, wherein the second BSR is received based on the uplink grant before the second arrival time.

[0236] Aspect 29 is a method according to any one of aspects 27 and 28, wherein the transmission time of the target PUSCH is indicated with reference to the transmission of the BSR.

[0237] Aspect 30 is a method according to any one of aspects 27 to 29, wherein the BSR indicates an estimated size of the second SDU based on the at least one first SDU.

[0238] Aspect 31 is a method according to any one of Aspects 24 to 30, the method further comprising: receiving a fourth BSR for a fourth SDU from the UE, the fourth BSR being based on an estimate of the fourth SDU, the estimate including a fourth arrival time of the fourth SDU at the modem of the UE, wherein the estimate of the fourth SDU is based on at least one third SDU having a third arrival time at the modem of the UE, the fourth arrival time being after the third arrival time, and based on the fourth estimate, the fourth BSR is included in a second target PUSCH of the at least one target PUSCH to send the second SDU based on the second BSR, and the second SDU is different from the fourth SDU.

[0239] Aspect 32 is an apparatus for wireless communication, the apparatus comprising at least one processor coupled to a memory and configured to implement any one of aspects 24 to 31, the apparatus further comprising a transceiver coupled to the at least one processor.

[0240] Aspect 33 is an apparatus for wireless communication, the apparatus comprising means for implementing any one of aspects 24 to 31.

[0241] Aspect 34 is a non-transitory computer readable medium storing computer executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 24 to 31.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: obtaining an estimate of a second service data unit (SDU) based on at least one first SDU having a first arrival time at a modem of the UE, the estimate of the second SDU comprising a second arrival time at the modem of the UE, the second arrival time being after the first arrival time; as well as Sending of a second buffer status report (BSR) for the second SDU is initiated based on the estimation of the second SDU.

2. The apparatus of claim 1, wherein the estimation of the second SDU further comprises an estimated size of the second SDU based on a size of the at least one first SDU.

3. The apparatus of claim 1, wherein the sending of the second BSR is initiated based on a failure to receive an uplink grant after the second arrival time and before a subsequent scheduling request (SR) opportunity.

4. The apparatus of claim 1 , wherein the at least one processor is further configured to: A configuration of a grant of at least one dedicated configuration for sending the second BSR of the second SDU based on the estimation of the second SDU is received.

5. The apparatus of claim 1 , wherein the at least one processor is further configured to: A scheduling request (SR) pattern and a first estimate of a delay between a scheduling request (SR) associated with the BSR and an uplink grant following the SR associated with the BSR are obtained.

6. The apparatus of claim 5, wherein the at least one processor is further configured to: The second arrival time is aligned based on the SR pattern and the first estimate of the delay. 7 . The apparatus of claim 5 , wherein the SR associated with the BSR is sent in an available SR opportunity that is closest to the second arrival time and before the second arrival time.

8. The apparatus of claim 1, wherein the BSR indicates a transmission time at which a target physical uplink shared channel (PUSCH) transmits the second SDU.

9. The apparatus of claim 8, wherein the at least one processor is further configured to: sending a scheduling request (SR) before the second arrival time; and receiving an uplink grant based on the SR, The second BSR is sent based on the uplink grant before the second arrival time.

10. The apparatus of claim 8, wherein the transmission time of the target PUSCH is indicated with reference to the transmission of the BSR.

11. The apparatus of claim 8, wherein the BSR indicates an estimated size of the second SDU based on the at least one first SDU.

12. The apparatus of claim 1, wherein the at least one processor is further configured to: A fourth estimate of a fourth SDU is obtained based on a third SDU having a third arrival time at the modem of the UE, the fourth estimate comprising a fourth arrival time at which the fourth SDU is estimated to arrive at the modem of the UE after the third arrival time, and the second SDU is different from the fourth SDU.

13. The apparatus of claim 12, wherein the second BSR indicates the second arrival time and the fourth arrival time.

14. The apparatus of claim 12, wherein the second BSR further indicates at least one of a second estimated size of the second SDU based on the at least one first SDU or a fourth estimated size of the fourth SDU based on the third SDU.

15. The apparatus of claim 12, wherein the second SDU and the fourth SDU are associated with different flows.

16. The apparatus of claim 12, wherein the at least one processor is further configured to: A fourth BSR for the fourth SDU is sent based on the fourth estimate, the fourth BSR being included in a second target physical uplink shared channel (PUSCH) to send the second SDU based on the second BSR. 17 . The apparatus of claim 16 , wherein the second BSR indicates a size of the fourth BSR to be included in the second target PUSCH.

18. The apparatus of claim 1, wherein the second BSR is transmitted in a physical uplink shared channel (PUSCH) in which the at least one first SDU is transmitted.

19. The apparatus of claim 1, wherein the second BSR for the second SDU is sent via a grant of the uplink configuration based on a failure to receive the second SDU at the modem of the UE prior to a grant of the uplink configuration, The second SDU is sent in a second target physical uplink shared channel (PUSCH) indicated by the second BSR.

20. The apparatus of claim 1, wherein the second BSR of the second SDU comprises an indication of a plurality of target physical uplink shared channels (PUSCHs), and wherein the second SDU is sent in at least one target PUSCH of the plurality of target PUSCHs.

21. An apparatus for wireless communication at a network node, the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: receiving, from a user equipment (UE), at least one buffer status report (BSR) indicating at least one target physical uplink shared channel (PUSCH), the at least one BSR comprising a second BSR based on an estimate of a second service data unit (SDU), the estimate of the second service data unit (SDU) comprising a second arrival time of the second SDU at a modem of the UE, the estimate of the second SDU being based on at least one first SDU having a first arrival time at the modem of the UE, the second arrival time being after the first arrival time; sending at least one uplink grant for the at least one target PUSCH based on the at least one BSR indicating the at least one target PUSCH; as well as The second SDU is received in the at least one target PUSCH.

22. The apparatus of claim 21, wherein the estimation of the second SDU further comprises an estimated size of the second SDU based on a size of the at least one first SDU.

23. The apparatus of claim 21, wherein the at least one processor is further configured to: A configuration of a grant of at least one dedicated configuration for sending the second BSR of the second SDU based on the estimation of the second SDU is sent.

24. The apparatus of claim 21, wherein the BSR indicates a transmission time at which the at least one target PUSCH transmits the second SDU.

25. The apparatus of claim 24, wherein the at least one processor is further configured to: receiving a scheduling request (SR) before the second arrival time; and sending an uplink grant based on the SR, Wherein the second BSR is received based on the uplink grant before the second arrival time.

26. The apparatus of claim 24, wherein the transmission time of the target PUSCH is indicated with reference to the transmission of the BSR.

27. The apparatus of claim 24, wherein the BSR indicates an estimated size of the second SDU based on the at least one first SDU.

28. The apparatus of claim 21, wherein the at least one processor is further configured to: receiving, from the UE, a fourth BSR for a fourth SDU, the fourth BSR being based on an estimate of the fourth SDU, the estimate of the fourth SDU comprising a fourth arrival time of the fourth SDU at the modem of the UE, wherein the estimation of the fourth SDU is based on at least one third SDU having a third arrival time at the modem of the UE, the fourth arrival time being after the third arrival time, and based on the fourth estimation, the fourth BSR is included in a second target PUSCH of the at least one target PUSCH to send the second SDU based on the second BSR, and the second SDU is different from the fourth SDU.

29. A method of wireless communication at a user equipment (UE), the method comprising: obtaining an estimate of a second service data unit (SDU) based on at least one first SDU having a first arrival time at a modem of the UE, the estimate of the second SDU comprising a second arrival time at the modem of the UE, the second arrival time being after the first arrival time; as well as Sending of a second buffer status report (BSR) for the second SDU is initiated based on the estimation of the second SDU.

30. A method for wireless communication at a network node, the method comprising: receiving, from a user equipment (UE), at least one buffer status report (BSR) indicating at least one target physical uplink shared channel (PUSCH), the at least one BSR comprising a second BSR based on an estimate of a second service data unit (SDU), the estimate of the second service data unit (SDU) comprising a second arrival time of the second SDU at a modem of the UE, the estimate of the second SDU being based on at least one first SDU having a first arrival time at the modem of the UE, the second arrival time being after the first arrival time; sending at least one uplink grant for the at least one target PUSCH based on the at least one BSR indicating the at least one target PUSCH; as well as The second SDU is received in the at least one target PUSCH.

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