SRS TD-OCC configuration

Abstract

An apparatus, a method, and a computer program product for wireless communication are provided. An example method may include receiving a configuration indicating that a UE applies one or more time domain orthogonal cover code (TD-OCC) sequences across a plurality of sounding reference signal (SRS) ports. The example method may also include transmitting an SRS on each SRS port of the plurality of SRS ports using the one or more TD-OCC sequences according to the configuration.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of and priority to U.S. Provisional Application Serial No. 63 / 377,704, filed on September 29, 2022, entitled “SRS TD-OCC CONFIGURATIONS,” U.S. Provisional Application Serial No. 63 / 377,711, filed on September 29, 2022, entitled “SRSDROPPING WITH TD-OCC,” and U.S. Non-Provisional Patent Application Serial No. 18 / 353,034, filed on July 14, 2023, entitled “SRS TD-OCC CONFIGURATIONS,” the entireties of which are expressly incorporated herein by reference. Technical Field

[0003] The present disclosure relates generally to communication systems, and more particularly to wireless communication systems utilizing Time Domain Orthogonal Cover Code (TD-OCC) sequences. Background Art

[0004] 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.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. 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 communications (mMTC), and ultra-reliable low latency communications (URLLC). Certain aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. Further improvements to 5G NR technology are needed. In addition, these improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0006] A simplified overview of one or more aspects is presented below to provide a basic understanding of these aspects. This summary is not an extensive review of all contemplated aspects. This summary neither identifies the key or important elements of all aspects, nor describes the scope of any or all aspects. Its sole 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.

[0007] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus at a user equipment (UE) are provided. The apparatus may include at least one memory and at least one processor coupled to the at least one memory. The at least one processor may be configured to receive a configuration indicating that the UE applies one or more time domain orthogonal cover code (TD-OCC) sequences across multiple sounding reference signal (SRS) ports. The at least one processor may be configured to send an SRS on each of the multiple SRS ports using the one or more TD-OCC sequences according to the configuration. The apparatus may include at least one memory and at least one processor coupled to the at least one memory. The at least one processor may be configured to discard one or more symbols in a group of symbols for a sounding reference signal (SRS) transmission with a time domain orthogonal cover code (TD-OCC), the SRS transmission including a cyclic shift and a comb offset. The at least one processor may be configured to determine whether to discard or send the remaining symbols of the SRS transmission.

[0008] In another aspect of the present disclosure, a method, a computer-readable medium, and an apparatus at a network node are provided. The apparatus may include at least one memory and at least one processor coupled to the at least one memory. The at least one processor may be configured to output an indication for the UE to apply a configuration of one or more TD-OCC sequences across multiple SRS ports. The at least one processor may be configured to receive SRS on each of the multiple SRS ports using the one or more TD-OCC sequences according to the configuration. The at least one processor may be configured to configure the UE with SRS resources for SRS transmission with TD-OCC. The at least one processor may be configured to provide an indication for the UE to discard or transmit the remaining symbols of the SRS transmission in response to discarding one or more symbols of the SRS transmission.

[0009] 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 some exemplary features of one or more aspects. However, these features indicate only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1is a diagram illustrating an example of a wireless communication system and an access network.

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

[0012] Figure 2B is a diagram illustrating an example of downlink (DL) channels within a subframe according to various aspects of the present disclosure.

[0013] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0014] Figure 2D is a diagram illustrating an example of uplink (UL) channels within a subframe according to various aspects of the present disclosure.

[0015] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0016] Figure 4 is a diagram illustrating an example of a comb interval and a comb offset.

[0017] Figure 5A is a diagram illustrating an example of frequency hopping and repetition.

[0018] Figure 5B is a diagram illustrating an example of frequency hopping and repetition.

[0019] Figure 5C is a diagram illustrating an example of frequency hopping and repetition.

[0020] Figure 6 is a diagram illustrating an example of multiplexing of different SRS ports.

[0021] Figure 7 is a diagram illustrating example communications between network entities and a UE.

[0022] Figure 8 is a diagram illustrating example port indexes, cyclic shifts, and comb offsets.

[0023] Fig. 9 is a diagram illustrating example communications between network entities and a UE.

[0024] Fig. 10A is a diagram illustrating an example of discarding SRS symbols.

[0025] Fig. 10B is a diagram illustrating an example of discarding SRS symbols.

[0026] Fig.11A is a diagram illustrating an example of discarding SRS symbols.

[0027] Fig. 11B is a diagram illustrating an example of discarding SRS symbols.

[0028] Fig.12 is a flow chart of a method of wireless communication.

[0029] Fig.13 is a flow chart of a method of wireless communication.

[0030] Fig.14 is a flow chart of a method of wireless communication.

[0031] Fig.15 is a flow chart of a method of wireless communication.

[0032] Fig.16 is a flow chart of a method of wireless communication.

[0033] Fig.17 is a flow chart of a method of wireless communication.

[0034] Fig.18 is a flow chart of a method of wireless communication.

[0035] Fig.19 are diagrams illustrating examples of hardware implementations for example apparatuses and / or network entities.

[0036] Fig. 20 is a diagram illustrating an example of a hardware implementation for an example network entity. DETAILED DESCRIPTION

[0037] The specific embodiments described below in conjunction with the accompanying drawings are descriptions of various configurations and do not represent the only configurations in 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 blurring these concepts.

[0038] Some aspects provided herein provide different configurations or UE capabilities for whether TD-OCC is used across different UEs or across different ports of the same UE (same SRS resource) and rules for the number of unique TD-OCC sequences that can be configured for SRS resources with P ports. For the case where TD-OCC is applied to SRS transmission of the same SRS resource at different SRS ports, various aspects provided herein may provide a mechanism for UE and base station to determine cyclic shift and / or comb offset based on whether the same TD-OCC sequence or different TD-OCC sequences are applied to the SRS port. Various aspects provided herein may provide an efficient mechanism for discarding SRS symbols in SRS for TD-OCC. In some aspects, discarding may not be used for all UEs. In some aspects, instead of discarding, the UE may change some SRS parameters in the SRS parameters to mitigate interference and still send the remaining symbols. Some aspects provided herein may allow the network to flexibly control the behavior of different SRS resources or different UEs in various scenarios.

[0039] Several aspects of telecommunication systems are presented with reference to various apparatus and methods. These apparatus 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 such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0040] 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, gated 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, procedures, functions, or any combination thereof.

[0041] Therefore, in one or more example aspects, specific implementations and / or use cases, the described functions may be implemented in hardware, software, or any combination thereof. If implemented in 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 media that can be accessed by a computer. As an 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.

[0042] 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, various 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 or may not be specifically for use cases or applications, the described examples may have a wide range of applicability. Various aspects, specific implementations and / or use cases can 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 actual settings, the equipment combined with the various aspects and features described may also include additional components and features for implementing and practicing the claimed and described aspects. 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 / summers, etc.) The various techniques described herein can be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc., of various sizes, shapes, and configurations.

[0043] The deployment of a communication system (such as a 5G NR system) can be arranged in a variety of ways using various components or constituent parts. 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 network equipment (such as a base station (BS)) or one or more units (or one or more components) performing base station functions can be implemented in an aggregated or 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.

[0044] 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).

[0045] 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 functions across two or more units at various physical locations, as well as virtually distributing the functions of at least one unit, which may enable flexibility in network design. Various units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0046] 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.

[0047] Each of these 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 the 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 signals or send signals to one or more of the other units via 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 and / or send signals to one or more of the other units via a wireless transmission medium.

[0048] 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.

[0049] 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 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.

[0050] 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 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 specific 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).

[0051] 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 .

[0052] 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.

[0053] 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 adjust 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).

[0054] 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 transmit diversity. The communication link may be through one or more carriers. For each carrier allocated in a carrier aggregation of up to YxMHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use a spectrum of up to YMHz (e.g., 5MHz, 10MHz, 15MHz, 20MHz, 100MHz, 400MHz, etc.) bandwidth. These carriers may 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 to DL than to UL). Component carriers 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).

[0055] 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). D2D communication may be performed via a variety of wireless D2D communication systems, such as, for example, Bluetooth TM (Bluetooth is a trademark of the Bluetooth Special Interest Group (SIG)), Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard TM (Wi-Fi is a trademark of the Wi-Fi Alliance), LTE or NR.

[0056] 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, for example, 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.

[0057] 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) that is identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0058] 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 (7.125GHz–24.25GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and therefore 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 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6GHz-71GHz), FR4 (71GHz-114.25GHz) and FR5 (114.25GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

[0059] In view of the above, unless otherwise specified, if the term "6 GHz or less" is used herein, it may 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 herein, it may 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.

[0060] 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 optimal 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.

[0061] The base station 102 may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a transceiver base station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a 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 and 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 decomposed base station including one or more of a CU, a DU, and / or a RU. A set of base stations that may include decomposed base stations and / or aggregated base stations may be referred to as a next generation (NG) RAN (NG-RAN).

[0062] 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 the 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, the LMF 166, the position determination entity (PDE), the serving mobile location center (SMLC), the mobile positioning center (MPC), etc. The GMLC 165 and the LMF 166 support UE location services. The GMLC 165 provides an interface for clients / applications (e.g., emergency services) to access UE positioning information. The LMF 166 receives measurements and assistance information from the NG-RAN and the UE 104 via the AMF 161 to calculate the location of the UE 104. The NG-RAN may determine the location of the UE 104 using one or more positioning methods. Positioning the UE 104 may involve signal measurements, position estimation, and optional speed calculations based on these measurements. Signal measurements may be performed by the UE 104 and / or the base station 102 serving the UE 104. 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.

[0063] 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 constellation arrangement. One or more of these devices may access the network collectively and / or individually.

[0064] Reference again Figure 1 , in some aspects, the UE 104 may include a TD-OCC component 198. In some aspects, the TD-OCC component 198 may be configured to receive a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports. In some aspects, the TD-OCC component 198 may also be configured to receive a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports. In some aspects, the TD-OCC component 198 may be configured to discard one or more symbols in a set of symbols for an SRS transmission with TD-OCC, the SRS transmission including a cyclic shift and a comb offset. In some aspects, the TD-OCC component 198 may also be configured to determine whether to discard or send the remaining symbols of the SRS transmission.

[0065] In some aspects, the base station 102 may include a TD-OCC component 199. In some aspects, the TD-OCC component 199 may be configured to output an indication that the UE applies one or more TD-OCC sequences across multiple SRS ports. In some aspects, the TD-OCC component 199 may also be configured to receive SRS on each of the multiple SRS ports using one or more TD-OCC sequences according to the configuration. In some aspects, the TD-OCC component 199 may be configured to configure the UE with SRS resources for SRS transmission with TD-OCC. In some aspects, the TD-OCC component 199 may also be configured to provide an indication of the UE discarding or sending the remaining symbols of the SRS transmission in response to discarding one or more symbols of the SRS transmission.

[0066] Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0067] As described herein, a node (which may be referred to as a node, a network node, a network entity, or a wireless node) may include, may be, or may be included in (e.g., as a component of) a base station (e.g., any base station described herein), a UE (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, an integrated access and backhaul (IAB) node, a distributed unit (DU), a central unit (CU), a remote / radio unit (RU) (which may also be referred to as a remote radio unit (RRU)), and / or another processing entity configured to perform any of the techniques described herein. For example, the network node may be a UE. For another example, the network node may be a base station or a network entity. For another example, a first network node may be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a UE. In another aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a base station. In yet other aspects of this example, the first network node, the second network node, and the third network node may be different relative to these examples. Similarly, references to UE, base station, device, equipment, computing system, etc. may include disclosure of UE, base station, device, equipment, computing system, etc. as a network node. For example, a disclosure that a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node. Consistent with the present disclosure, once a specific example is expanded according to the present disclosure (e.g., a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node), a broader example of a narrower example may be interpreted in reverse, but in a broad, open-ended manner. In the above example where a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node, the first network node may refer to a first UE configured to receive information, a first base station, a first device, a first device, a first computing system, a first set of one or more components, a first processing entity, etc.; and the second network node may refer to a second UE, a second base station, a second device, a second device, a second computing system, a second set of one or more components, a second processing entity, etc.

[0068] As described herein, different terms may be used in various aspects to describe the communication of information (e.g., any information, signal, etc.). Disclosure of one communication term includes disclosure of other communication terms. For example, a first network node may be described as being configured to send information to a second network node. In this example and consistent with the present disclosure, disclosure that the first network node is configured to send information to the second network node includes disclosure that the first network node is configured to provide, transmit, output, communicate, or send information to the second network node. Similarly, in this example and consistent with the present disclosure, disclosure that the first network node is configured to send information to the second network node includes disclosure that the second network node is configured to receive, obtain, or decode information provided, transmitted, output, communicated, or sent by the first network node.

[0069] Figure 2A FIG200 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) (wherein 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) (wherein 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 can be configured with any of the various available slot formats 0 to 61. Slot formats 0 and 1 are all DL and all UL, respectively. Other slot formats 2 to 61 include a mix of DL, UL and flexible symbols. The UE is configured with the slot format through the received slot format indicator (SFI) (dynamically configured through DL control information (DCI) or semi-statically / statically configured through radio resource control (RRC) signaling).

[0070] 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 equally sized subframes (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 normal or extended. For a normal 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) extended OFDM (DFT-s-OFDM) symbol (for power-constrained 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) (see Table 1), and the symbol length / duration can be scaled by 1 / SCS.

[0071]

[0072] Table 1: Parameter set, SCS and CP

[0073] 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).

[0074] A resource grid may be used to represent a 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.

[0075] 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).

[0076] 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 number of RBs in the system bandwidth and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not sent via the PBCH (such as a system information block (SIB)), and paging messages.

[0077] 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 DM-RS for a physical uplink control channel (PUCCH) and DM-RS for a physical uplink shared channel (PUSCH). The PUSCH DM-RS may be sent in the first or first 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 combs in the comb. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0078] 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 be used to carry, among other things, a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0079] 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.

[0080] 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. Subsequently, each stream can be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time domain 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 pre-coded 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 for transmission using a corresponding spatial stream.

[0081] 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 stream 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 a controller / processor 359, which implements layer 3 and layer 2 functionality.

[0082] The controller / processor 359 may be associated with at least one memory 360 that stores program codes and data. The at least one 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.

[0083] Similar to the functionality 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.

[0084] 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.

[0085] 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 respective antenna 320. Each receiver 318Rx recovers information modulated onto an RF carrier and provides the information to the RX processor 370.

[0086] The controller / processor 375 may be associated with at least one memory 376 that stores program codes and data. The at least one 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.

[0087] 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 The TD-OCC component 198 combines various aspects.

[0088] 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 The TD-OCC component 199 combines various aspects.

[0089] SRS is a UL reference signal sent by the UE in the uplink direction, which can be used by the network entity to estimate the uplink channel quality in bandwidth and / or beam direction. The UE can send SRS based on the configuration received from the network. The network can then measure the SRS transmission to estimate the channel quality. The SRS configuration may include various information, such as comb spacing, comb offset, timing information, etc. Figure 2C Example aspects of SRS transmission are illustrated.

[0090] As an example, the comb spacing configured for SRS may indicate the frequency comb spacing between SRS REs in a symbol. TC ) can be configured as 2, 4 or 8 per SRS resource. As an example, a comb interval of 2 corresponds to the interval between two SRS REs in an OFDM symbol. A comb interval of 4 corresponds to an interval of 4 REs between SRS resources, and a comb interval of 8 corresponds to an interval of 8 REs between SRS resources. Figure 4 A resource diagram 400 in time and frequency is illustrated. Figure 4 In the example, the SRS in symbol index 8 and symbol index 9 have a comb interval of 2, while the SRS in symbol index 11 and 12 have a comb interval of 4. The comb offset may indicate the position of the SRS RE, for example, relative to a start RE or a reference RE. For example, the comb offset of the SRS Can be configured as 0, 1, ... K per SRS resource TC -1, the comb offset indicates the SRS RE (for example, by indicating the starting RE, and once the starting RE is determined, the SRS transmission can occupy every K in the sounding BW TC RE). Figure 4 400 in exemplifies various example aspects of the combination of comb spacing and comb offsets. The SRS in symbol indexes 8 and 11 have, for example, an offset of 0 and have a starting RE corresponding to subcarrier index 0 or a reference subcarrier within the bandwidth that the SRS is configured to transmit. The SRS in symbol index 9 has, for example, a comb offset of 1 and starts at subcarrier index 1, for example, offset by 1 RE or subcarrier from the reference subcarrier. The SRS in symbol index 12 has an offset of 2 and is offset by 2 REs from subcarrier index 0.

[0091] The SRS configuration may indicate the number of symbols in which the SRS is to be transmitted and may indicate the number of repetitions for the SRS. Each SRS resource used by the UE to transmit the SRS and by the base station to receive the SRS may be configured with N OFDM symbols and R repetitions, where N and R are positive integers. If R < N, there are N / R frequency hops within the SRS resource. Figure 5A FIG. 500 is a diagram illustrating an example of frequency hopping and repetition for SRS transmission. As Figure 5A illustrated, the sounding bandwidth associated with the SRS may be 48 PRBs, and the bandwidth per hop may be 24 PRBs. Figure 5A An example of 2 frequency hops is illustrated in this example. Figure 5A An example is illustrated in which the SRS may be configured for 2 OFDM symbols (e.g., N = 2) with 1 repetition (e.g., r = 1). Figure 5B FIG. 530 is a diagram illustrating another example of frequency hopping and repetition. As Figure 5B illustrated, the sounding bandwidth associated with the SRS may be 48 PRBs, and the bandwidth per hop may be 12 PRBs. Figure 5B An example of 4 frequency hops for the SRS configuration for 4 OFDM symbols (e.g., N = 4) with 1 repetition (e.g., R = 1) is illustrated. Figure 5C FIG. 550 is a diagram illustrating another example of frequency hopping and repetition. As Figure 5C illustrated, the sounding bandwidth associated with the SRS may be 48 PRBs, and the bandwidth per hop may be 24 PRBs. Figure 5C An example of 2 frequency hops on 4 OFDM symbols (e.g., N = 4) is illustrated, where there are 2 repetitions per hop (e.g., R = 2). Table 2 below illustrates example combinations of N and R for SRS resources.

[0092] N resources per SRS R = Repetition Factor 1 1 2 1,2 4 1,2,4 8 1,2,4,8 10 1,2,5,10 12 1,2,3,6,12 14 1,2,7,14

[0093] Table 2

[0094] A set of time and frequency resources that can be used for one or more transmissions of the SRS may be referred to as an "SRS resource set". In some communication systems, the SRS resource set applicability for an SRS resource set may be configured by a higher layer parameter, such as the "purpose" associated with the SRS resource set, such as in the SRS-ResourceSet parameter. For example, the purpose may be configured as one of beam management, codebook, non-codebook, antenna switching, etc. Each SRS resource set may be configured with one or more (such as up to 16) SRS resources. Each SRS resource set may be aperiodic, semi-persistent, or periodic.

[0095] In some wireless communication systems, two types of PUSCH transmissions may be supported. The first type may be referred to as codebook-based transmission. For codebook-based transmission, the UE may be configured with a set of SRS resources with "Purpose" set to "Codebook". For example, up to 4 SRS resources in the set may be configured for the UE. Each SRS resource may be a radio resource control (RRC) configured with multiple ports (such as one or more ports). The SRS Resource Indicator (SRI) field in the UL DCI that schedules the PUSCH may indicate an SRS resource. The number of ports configured for the indicated SRS resource may determine the number of antenna ports used for the PUSCH. The PUSCH may be transmitted using the same spatial domain filter (which may be otherwise referred to as a "beam") as the indicated SRS resource. The number of layers (i.e., rank) or the transmitted precoding matrix indicator (TPMI) (e.g., for a predecoder) for the scheduled PUSCH may be determined based on a separate DCI field "precoding information and number of layers".

[0096] For non-codebook based transmissions, the UE may be configured with one SRS resource set with "Purpose" set to "Non-Codebook". For example, up to 4 SRS resources in the set may be configured for the UE. Each SRS resource may be an RRC configured with one port. The SRI field in the UL DCI for scheduling PUSCH may indicate one or more SRS resources. The number of indicated SRS resources may determine the rank (i.e., number of layers) used for the scheduled PUSCH. The PUSCH may be transmitted using the same pre-decoder as the indicated SRS resource and the same spatial domain filter (i.e., beam).

[0097] The SRS resource may correspond to one or more SRS ports. Each SRS port may correspond to an actual UE physical antenna or a virtual antenna constructed based on analog, digital or other operations of the UE physical antenna. Each SRS port may be represented by a port identifier (ID). For SRS resources associated with multiple SRS ports, different cyclic shifts and / or different comb offsets may be used for SRS transmissions from different SRS ports. As used herein, the term "cyclic shift" may refer to a bitwise operation of moving one or more bits at the end to the beginning and shifting other entries to a later position. As an example, in each symbol, a set of SRS ports may be detected via different subcarriers or in overlapping subcarriers with different cyclic shifts and different comb offsets. Figure 6 600 is a diagram illustrating an example of multiplexing of SRS transmissions from different SRS ports of a UE. Figure 6As illustrated, in a first example, with N=2 symbols and R=2 repetitions, four different cyclic shifts are used in the same two SRS symbols (e.g., symbol indexes 8 and 9) and with the same comb spacing and comb offset (e.g., on the same RE) to detect four SRS ports (e.g., SRS ports 1000, 1001, 1002, and 1003) (e.g., SRS transmissions are sent from the 4 SRS ports of the UE in each SRS symbol). For example, SRS transmissions are sent from the first SRS port with a first cyclic shift, from the second SRS port with a second cyclic shift, from the third SRS port with a third cyclic shift, and from the fourth SRS port with a fourth cyclic shift. In a second example, with N=2 symbols and R=2 repetitions, four SRS ports (e.g., SRS ports 1000, 1001, 1002, and 1003) are detected with two different cyclic shifts and two different comb offsets in each SRS symbol (e.g., in symbol indexes 11 and 12). For example, the UE transmits SRS transmissions from SRS ports 1001 and 1003 using a comb spacing of 4 and a comb offset of 2, for example, using a first cyclic shift for the SRS transmission from SRS port 1001 and a second cyclic shift for the SRS transmission from SRS port 1003. The UE also transmits SRS transmissions from SRS ports 1000 and 1002 using a comb spacing of 4 and a comb offset of 0, using different cyclic shifts for the SRS transmissions from SRS ports 1000 and 1002.

[0098] For an SRS resource associated with multiple SRS ports, the cyclic shifts may be evenly distributed between the ports, wherein the cyclic shift for the first port is RRC configured for the SRS resource. For 4 ports, as shown in the example in Table 3 below, ports {0, 2} and {1, 3} may be separated by different comb offsets.

[0099]

[0100]

[0101] Table 3

[0102] In some respects, Can be equal to:

[0103]

[0104] In some aspects, SRS transmissions from different SRS ports may be transmitted using TD-OCC. For example, a UE may transmit SRS in two different REs located on the same subcarrier but on different symbols, and may code division multiplex (CDM) the two SRS ports using OCC {1,1} and {1,-1}. That is, in a first RE, p1+p2 may be transmitted, and in a second RE, p1-p2 may be transmitted, where p1 represents the SRS of the first port, and p2 represents the SRS of the second port. In another example, for 4 SRS ports, a 4-port TD-OCC = {{1,1,1,1}, {1,-1,1,-1}, {1,1,-1,-1}, {1,-1,-1,1}} can be used: p1+p2+p3+p4 on the first symbol, p1-p2+p3-p4 on the second symbol, p1+p2-p3-p4 on the third symbol, p1-p2-p3+p4 on the fourth symbol, where p3 represents the SRS of the third port, and p2 represents the SRS of the fourth port. For a TD-OCC of length X, where X is a power of 2 (2, 4, 8, ...), an orthogonal code of length X such as a Walsh code can be used across X symbols. The Walsh code can be an orthogonal code in which all members of the set are orthogonal to each other. Other codebooks such as those based on DFT or, for example, {1,j,1,j}, {1,-j,1,-j} can also be used for TD-OCC. TD-OCC may also be used across different UEs, or across different ports of a UE and across different UEs. As an example, a first UE (UE1) may be configured with SRS resources for 2 SRS ports using TD-OCC {1,1,1,1} and {1,-1,1,-1} across 4 OFDM symbols. A second UE (UE2) may be configured with SRS resources for 2 ports using TD-OCC {1,1,-1,-1} and {1,-1,-1,1} across 4 OFDM symbols. Table 4 below shows an example configuration for the first UE and the second UE:

[0105]

[0106] Table 4

[0107] Since the same cyclic shift and the same comb offset can be used for multiple SRS ports of an SRS resource or for multiple UEs, the overall capacity of SRS detection of multiple SRS ports (e.g., and overlapping SRS detection of different UEs) can be increased. Some aspects provided herein provide different configurations or UE capabilities regarding whether TD-OCC is used across different UEs or across different ports of the same UE (same SRS resource) and rules regarding the number of unique TD-OCC sequences that can be configured for an SRS resource with P ports. For the case where TD-OCC is applied to SRS transmission of the same SRS resource at different SRS ports, the various aspects provided herein may provide a mechanism for UE and base station to determine cyclic shift and / or comb offset based on whether the SRS port applies the same TD-OCC sequence or different TD-OCC sequences.

[0108] Figure 7 700 is a diagram illustrating an example communication between a network entity 704 and a UE 702. The network entity 704 may be a network node. The network node may be implemented as a converged base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, a sidelink node, etc. The network entity may be implemented in a converged or monolithic base station architecture, or alternatively in a disaggregated base station architecture, and may include one or more of a CU, a DU, a RU, a near real-time (near-RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC.

[0109] like Figure 7 As illustrated, UE 702 may receive TD-OCC configuration 708 from network entity 704. TD-OCC configuration 708 may provide different configurations for whether to use TD-OCC across different UEs or across different ports (same SRS resources) of the same UE. In some aspects, a single TD-OCC sequence may be applied across each SRS port in the SRS port. In other aspects, different TD-OCC sequences may be applied to different SRS ports. Various aspects presented herein provide rules for the number of unique TD-OCC sequences that may be configured for SRS resources having P ports. At 710, UE 702 may determine cyclic shift, comb offset, or TD-OCC sequence for SRS transmission from different ports. Then, at 712, the UE uses the determined cyclic shift, comb offset, comb interval, and TD-OCC sequence (e.g., as determined at 710) to transmit SRS from multiple ports.

[0110] In some aspects, the TD-OCC configuration 708 may implicitly or explicitly configure the UE 702 to apply the same TD-OCC sequence to all SRS ports in the SRS 712. As an example, the configuration at 708 may provide one (e.g., a single) TD-OCC sequence (M=1) applied to all SRS ports for an SRS resource configuration, where M is a positive integer representing the number of unique TD-OCC sequences configured for an SRS resource.

[0111] In some aspects, the TD-OCC configuration 708 may implicitly or explicitly configure the UE 702 to apply different TD-OCC sequences to different SRS ports in the SRS 712. In some aspects, multiple unique TD-OCC sequences may be configured for an SRS resource, e.g., M>1. The TD-OCC length (the number of symbols over which the TD-OCC is applied) may be denoted as X, and P may represent the number of SRS ports (the number of SRS ports may also be denoted as ).

[0112] In some aspects, the rules for the TD-OCC configuration 708 may indicate that the number of unique TD-OCC sequences is less than or equal to the number of SRS ports (e.g., M≤P). In such an example, a maximum of P TD-OCC sequences may be used, one for each SRS port. In some aspects, the rules for the TD-OCC configuration 708 may indicate that the number of unique TD-OCC sequences is less than or equal to the TD-OCC length (e.g., M≤X). In this example, the maximum number of TD-OCC sequences is equal to the length of the sequence (e.g., for Walsh codes or other orthogonal codes). In some aspects, the rules for the TD-OCC configuration 708 may indicate that the ratio of the number of SRS ports to the number of unique TD-OCC sequences (e.g., P / M) is an integer. For example, if P=4, then M may be 1 (e.g., so that a single TD-OCC sequence is applied across each of the multiple SRS ports), 2, or 4, but not 3, which would result in a non-integer ratio of P / M. K (e.g., K=P / M) may represent the number of ports using the same (e.g., shared) TD-OCC sequence. If P / M is an integer value, the number of ports using the same TD-OCC sequence in each group may be the same. If P / M is not an integer, at least one group of ports (using the same TD-OCC sequence) may be larger than another group (using another TD-OCC sequence).

[0113] In some aspects, the TD-OCC configuration 708 may implicitly or explicitly indicate whether the UE 702 applies different TD-OCC sequences to different SRS ports in the SRS 712 or applies the same TD-OCC sequence to all SRS ports in the SRS 712. In some aspects, the configuration may include an indication that different TD-OCC sequences are applied to different SRS ports. In some aspects, the configuration may include an indication that the same TD-OCC sequence is applied to different SRS ports. In some aspects, the value of M (e.g., the number of unique TD-OCC sequences) configured in the configuration may provide the indication to the UE. In some aspects, the UE 702 may provide a capability indication 706 indicating the UE capability related to the TD-OCC for SRS transmission to the network entity 704. As an example, the UE may indicate that it supports the application of different TD-OCC sequences across different SRS ports. The UE may indicate that it supports the application of a single TD-OCC sequence across different SRS ports, for example, which may indicate that the UE does not support the application of different TD-OCC sequences across multiple SRS ports. In some aspects, the lack of a capability indication from the UE may indicate that the UE does not support different TD-OCC sequences across multiple SRS ports, for example, but supports a single TD-OCC sequence across multiple SRS ports. In some aspects, if there is no signaling otherwise provided in the TD-OCC configuration 708, the UE 702 may apply the same TD-OCC sequence to multiple SRS ports in the SRS 712 (e.g., for each SRS port of the SRS resource). In some aspects, the capability indication 706 from the UE may also indicate the maximum supported value of M. For example, for a UE supporting 4 SRS ports and case 2 TD-OCC, the UE may support up to 2 TD-OCC sequences for 4 SRS ports, but does not support 4 TD-OCC sequences.

[0114] In some aspects, M TD-OCC sequences for application by UE 702 across different SRS ports may be explicitly provided in TD-OCC configuration 708. For example, the configuration at 708 may include an RRC configuration that provides M sequences for each SRS resource configured by the UE. In some aspects, the set of possible TD-OCC sequences applicable to UE 702 may be known or such as defined in a standard. As an example, the set of possible TD-OCC sequences may include Walsh codes known to the UE. Each possible TD-OCC sequence in the possible TD-OCC sequence may be associated with an index or other identifier. At 708, the configuration may include M indices associated with M possible TD-OCC sequences per SRS resource in the possible TD-OCC sequence (e.g., via radio resource control (RRC) signaling). By receiving the index in the configuration, at 708, the UE may be able to identify the corresponding TD-OCC sequence. In some aspects, the number of configured sequences may be signaled to UE 702 to determine the value of M and identify the corresponding TD-OCC sequence. In some aspects, the set of possible TD-OCC sequences applicable by the UE 702 may be known at the UE 702 (such as a defined set of possible TD-OCC sequences) without network signaling (e.g., Walsh code), and the set may include T sequences with indices 0, 1, ... T-1. The network entity 704 may configure (e.g., via RRC signaling) (e.g., in the TD-OCC configuration 708) the index associated with the first or initial TD-OCC sequence (e.g., represented by t0) and the number of TD-OCC sequences (corresponding to the value of M). The UE 702 may determine the remaining M-1 TD-OCC sequences based on a rule. In some aspects, the rule may represent a continuous index such as (t0+m)Mod T, where m=0, 1...M-1. In some aspects, the rule may represent a uniformly distributed index across T indices such as (t0+m*T / M)Mod T, where m=0, 1...M-1. Tables 4 and 5 below illustrate different possible TD-OCC sequences.

[0115] Sequence Index TD-OCC sequence 0 +1,+1,+1,+1 1 +1,-1,+1,-1 2 +1,+1,-1,-1 3 +1,-1,-1,+1

[0116] Table 4

[0117]

[0118] Table 5

[0119] In some aspects, at 710, when a single (e.g., one) TD-OCC sequence for SRS resource configuration is applied to all SRS ports (M = 1), the UE 702 may determine that the SRS ports of the SRS 712 are not TD-OCC orthogonalized, and the UE may transmit SRS at different SRS ports on the same SRS resource using different cyclic shifts or different comb offsets. For example, for two SRS ports, the UE may transmit SRS from the two SRS ports using the same comb offset but different cyclic shifts. For four SRS ports, depending on the comb spacing or the initially configured cyclic shift, the SRS transmissions on the same SRS resource for different SRS ports may have the same comb offset but different cyclic shifts, or the SRS transmissions from ports {0, 2} may be transmitted using a first comb offset, while the SRS transmissions from SRS ports {1, 3} may have another comb offset (and the SRs transmissions with the same comb offset from SRS ports may have different cyclic shifts).

[0120] In some aspects, at 710, when the UE 702 applies different TD-OCC sequences to different SRS ports of the SRS 712, if M = P, all ports may be on the same comb offset and have the same cyclic shift (since the SRS transmissions from different ports are TD-OCC orthogonalized). In some aspects, at 710, when the UE 702 applies different TD-OCC sequences to different SRS ports in the SRS 712, if M < P, for two SRS ports to which the same TD-OCC sequence is applied, the UE may use different cyclic shifts or different comb offsets to help distinguish the SRS transmissions from different SRS ports. In some aspects, at 710, when the UE 702 applies different TD-OCC sequences to different SRS ports in the SRS 712, if M < P, for ports with different TD-OCC sequences, the UE may use the same cyclic shift and the same comb offset. In some aspects, the UE may group SRS ports based on whether the UE supports using the same TD-OCC sequence for different SRS ports.

[0121] In some aspects, if M < P and K = P / M is an integer greater than 1, the UE 702 may apply different TD-OCC sequences to different SRS ports of the SRS 712. In some of such aspects, P SRS ports are grouped into M groups. Within a group, the same TD-OCC sequence may be applied. Across different groups, different TD-OCC sequences may be applied. Each group may include K ports. In some aspects, consecutive port numbers may belong to the same group. For example, ports {0, 1, …, K−1} are in the first group, ports {K, K + 1, …, 2K−1} are in the second group, ……, and ports {P−K, …, P−1} belong to the Mth group. In some aspects, port numbers having the same modulus with respect to M are in the same group. For example, ports {0, M, …, (K−1)M} are in the first group, ports {1, M + 1, …, (K−1)M + 1} are in the second group, ……, and ports {M−1, 2M−1, …, P−1} are in the Mth group. In some aspects, within a port group, different cyclic shifts or comb offsets may be used for different ports. In some aspects, the first port index within each group may have a cyclic shift (e.g., the cyclic shift may be configured by RRC) (e.g., configured in the TD-OCC configuration 708). In some aspects, if K = 2, the two ports in the group may have the same comb offset but different cyclic shifts. In some aspects, the second port index within the group may have a cyclic shift where represents the maximum number of cyclic shifts (corresponding to the comb spacing). In some aspects, if K = 4, the four ports in the group may have the same comb offset but different cyclic shifts (for comb spacings 2 and 4, and when the configured is in the first half) or the first and third ports within the group may be on the first comb offset while the second and fourth ports within the group may be on another comb offset, and the ports within the same comb offset may have different cyclic shifts (for comb spacing 8 or for comb spacings 2 and 4, and when the configured is in the second half). In some aspects, across different groups and for the ith port index of each group, different ports may have the same cyclic shift and the same comb offset.

[0122] Figure 8 FIG. 800 is a diagram illustrating an example application of cyclic shifts and comb offsets across port indices based on port grouping. As an example, if P = 8, M = 2 and K correspondingly equals 4, if the configured cyclic shift is 0 the configured comb offset is 1 and the comb spacing is 8( If it is 6), then in some aspects, there may be 2 groups, each group having 4 ports. In some aspects where consecutive port numbers belong to the same group, the first group includes ports {0, 1, 2, 3} and the second group includes ports {4, 5, 6, 7}. In some aspects where port numbers having the same modulus with respect to M are in the same group, the first group includes ports {0, 2, 4, 6} and the second group includes ports {1, 3, 5, 7}. In some aspects, the first group uses the TD-OCC sequence {1, 1}, and the second group uses the TD-OCC sequence {1, -1}. Within a group, for cyclic shift and comb offset, the four ports in the group may have the same comb offset but different cyclic shifts (for comb spacings 2 and 4, and when configured in the first half). Or the first and third ports within the group are at one comb offset, while the second and fourth ports within the group are at another comb offset, and the ports within the same comb offset have different cyclic shifts (for comb spacing 8 or for comb spacings 2 and 4, and when configured in the second half). In some aspects, the cyclic shift and comb offset of the i-th port of the two groups are the same.

[0123] In some aspects, the UE 702 may apply different TD-OCC sequences to different SRS ports in the SRS 712, M < P, and K = P / M is an integer greater than 1. In some aspects of such cases, the P SRS ports can be grouped into K groups. Within a group, different TD-OCC sequences are applied. The same TD-OCC sequence can be applied to the i-th port of each group. Each group includes M ports. In some aspects, consecutive port numbers belong to the same group. For example, ports {0, 1, …, M - 1} are in the first group, ports {M, M + 1, …, 2M - 1} are in the second group, ……, and ports {P - M, …, P - 1} belong to the K-th group. In some aspects, port numbers having the same modulus with respect to K are in the same group, that is, ports {0, K, …, (M - 1)K} are in the first group, ports {1, K + 1, …, (M - 1)K + 1} are in the second group, ……, and ports {K - 1, 2K - 1, …, P - 1} are in the K-th group. In some aspects, within a port group, the same cyclic shift and the same comb offset are used for different ports. In some aspects, different cyclic shifts or comb offsets are used across different groups. In some aspects, the first group may have a cyclic shift (e.g., configured by RRC) (e.g., configured in the TD-OCC configuration 708). In some aspects, if K = 2, the first and second groups may have the same comb offset but different cyclic shifts. In some aspects, the second group may have a cyclic shift where is the maximum number of cyclic shifts (corresponding to the comb spacing). In some aspects, if K=4, then four groups may have the same comb offset but different cyclic shifts (for comb spacings 2 and 4, and the configured When in the first half) or the first and third groups can be on a first comb offset and the second and fourth groups on another comb offset, and the ports within the same comb offset have different cyclic shifts (for comb spacing 8 or for comb spacing 2 and 4, and when the configured In the second half). Table 6 below provides an example:

[0124]

[0125] Table 6

[0126] As shown in Table 6, when P=8, M=2 and K=4, if the configured cyclic shift is 0 The configured comb offset is 1 And the comb interval is 8 ( is 6). There may be 4 groups, each with 2 ports. When consecutive port numbers belong to the same group, the first group includes ports {0,1}, the second group includes ports {2,3}, the third group includes ports {4,5}, and the fourth group includes ports {6,7}. When port numbers with the same modulus with respect to K are in the same group, the first group includes ports {0,4}, the second group includes ports {1,5}, the third group includes ports {2,6}, and the fourth group includes ports {3,7}. For each group, the first port may apply the TD-OCC sequence {1,1}, and the second port may apply the TD-OCC sequence {1,-1}. Within a group, the same comb offset and cyclic shift may be used. Across groups, for cyclic shift and comb offset, four groups may have the same comb offset but different cyclic shifts (for comb intervals 2 and 4, and when configured When in the first half) or the first and third groups can be on a first comb offset and the second and fourth groups on another comb offset, and the ports within the same comb offset have different cyclic shifts (for comb spacing 8 or for comb spacing 2 and 4, and when the configured in the second half).

[0127] In some wireless communication systems without TD-OCC for SRS, when a group of symbols of SRS resources are discarded, the remaining symbols can still be sent. SRS discarding can be performed at a per-symbol level (for example, while PUCCH / PUSCH discarding may not be performed at a per-symbol level). However, when TD-OCC is used to orthogonalize the SRS of multiple UEs or multiple ports of the same SRS resource of the same UE, discarding one symbol in the SRS transmission may result in the loss of orthogonalization of the remaining symbols in the SRS transmission. For example, if two UEs use the TD-OCC sequences [+1, +1] and [+1, -1] (using the same comb offset and cyclic shift) on two OFDM symbols, if the first symbol of the first UE is discarded, the two SRS on the second symbol may experience large interference because [0, +1] and [+1, -1] are no longer orthogonal. If at least one symbol is discarded, discarding the remaining symbols within the TD-OCC can avoid interference, but it may be inefficient. The various aspects provided herein can provide an efficient mechanism for discarding SRS symbols in SRS for TD-OCC. In some aspects, discarding may not be used for all UEs. In some aspects, instead of discarding, the UE may change some of the SRS parameters to mitigate interference and still send the remaining symbols. Some aspects provided herein may allow the network to flexibly control the behavior of different SRS resources or different UEs in various scenarios.

[0128] Fig. 9 900 is a diagram illustrating an example communication between a network entity 904, a UE 902, and a UE 906. The network entity 904 may be a network node. The network node may be implemented as a converged base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, a sidelink node, etc. The network entity may be implemented in a converged or monolithic base station architecture, or alternatively in a disaggregated base station architecture, and may include one or more of a CU, a DU, a RU, a near real-time (near-RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC.

[0129] like Fig. 9As illustrated, the network entity 904 may send a configuration 907A of SRS resources for SRS 914A to the UE 902 and a configuration 907B of SRS resources for SRS 914B to the UE 906. In some aspects, the UE 902 may receive an indication 908A of SRS discard associated with the SRS 914A from the network entity 904. In some aspects, the UE 906 may receive an indication 908B of SRS discard associated with the SRS 914B from the network entity 904. In some aspects, at 910, the UE 902 or the UE 906 may discard one or more symbols of the SRS 914A. In some aspects, the discard at 910 may be due to one or more of the following: 1) overlapping in time with SSB symbols, 2) overlapping in time with dynamic DL signals or channels, 3) overlapping in time with other UL signals or channels with higher priority, 4) indicated to be cancelled based on an uplink cancellation indication (ULCI) (e.g., in DCI format 2_4), or 5) related to a slot format indicator (SFI). An example of overlapping in time with a dynamic DL signal or channel may be that the SRS is periodic or semi-persistent over a set of symbols (e.g., configured by a higher layer), where the downlink control information (DCI) may schedule CSI-RS or PDSCH on a subset of the set of symbols. An example of overlapping in time with other UL signals or channels with higher priority may be overlapping with PUSCH. If the SRS overlaps with the PUCCH, the SRS is discarded unless the SRS is an aperiodic SRS that is triggered to be transmitted to overlap with a PUCCH carrying a semi-persistent / periodic CSI report or a semi-persistent / periodic layer 1 (L1) reference signal received power (RSRP) report or an L1 signal to interference and noise (SINR) report in the same symbol. In some aspects, when different SRS resources overlap, an SRS with a higher priority may be transmitted and an SRS with a lower priority may be discarded. As an example, an aperiodic (AP) SRS may have a higher priority than a semi-persistent (SP) SRS, and a semi-persistent SRS may have a higher priority than a periodic (P) SRS. In some aspects, when the UE is configured to monitor DCI format 2_0 indicated by a dynamic SFI, SFI-related discarding may be applied. If P / SP SRS is configured in a group of symbols and the dynamic SFI indicates "flexible" or "DL" on those symbols, the SRS may be discarded. If the P / SP SRS is configured in a set of symbols that is flexible as indicated by higher layers, the UE may be configured to monitor DCI format 2_0 (dynamic SFI), but the UE may not detect DCI format 2_0.

[0130] DCI format 0_0 may be a fallback format that may provide scheduling of a PUSCH in one cell. DCI format 0_1 ​​may be a non-fallback format that may provide scheduling of a PUSCH in one cell. DCI format 1_0 may be a fallback DCI format for allocating downlink resources for PDSCH. DCI format 1_1 may be a non-fallback DCI format for allocating downlink resources for PDSCH. DCI format 2_0 may be used to notify time slot format information (to dynamically change the time slot format). DCI format 2_1 may be used to notify where the UE may assume that there are no PRBs and OFDM symbols intended for transmission to the UE. DCI format 2_2 may be used to send transmit power control (TPC) commands for PUCCH and PUSCH. DCI format 2_3 may be used to send a set of TPC commands for SRS transmission for one or more UEs. DCI format 2_4 may be used (such as dedicated to) provide cancellation of UL transmission.

[0131] In some aspects, the UE 902 or UE 906 may determine at 912 between discarding or transmitting the remaining symbols of the SRS transmission. In some aspects, when a TD-OCC of length X is applied to X symbols of the SRS resource, if the UE (e.g., UE 902 or UE 906) discards one or more of the X symbols at 910, the UE may determine one of the following behaviors for the remaining symbols of the X symbols: 1) discard the remaining symbols of the X symbols, 2) transmit the remaining symbols of the X symbols using the originally configured parameters (e.g., cyclic shift or comb offset), or 3) transmit the remaining symbols of the X symbols using a different set of SRS parameters (e.g., cyclic shift or comb offset) in response to discarding one or more symbols. In some aspects, if a UE (e.g., UE 902 or UE 906) transmits the remaining symbols of the X symbols using a different set of SRS parameters (e.g., cyclic shift or comb offset) in response to dropping one or more symbols, the different set of SRS parameters may be changed based on: 1) transmitting a subset of ports without transmitting other ports, or 2) changing the cyclic shift or comb offset only for a subset of ports and using the originally configured cyclic shift / comb offset for other ports. In some aspects, when different TD-OCC sequences are used within ports of the same SRS resource (where the different TD-OCC sequences have the same cyclic shift and comb offset), the UE may transmit the remaining symbols of the X symbols using a different set of SRS parameters (e.g., cyclic shift or comb offset) in response to dropping one or more symbols. In some aspects, because the orthogonality between ports given by TD-OCC is lost due to dropping one or more symbols, one port may not be transmitted or one port may use a different comb offset or cyclic shift. In some aspects, a different set of SRS parameters may be changed based on applying TD-OCC in the remaining symbols that are not in the X symbols, since a TD-OCC with the original length may not be used.

[0132] Fig. 10A 1000 is a diagram illustrating an example of dropping SRS symbols. UE 1 may correspond to UE 902, and UE 2 may correspond to UE 906. Fig. 10A As illustrated, symbols at the same time are discarded. At least one of the two UEs may discard the second symbol or change the cyclic shift or comb offset to avoid interference. The other UE may send the remaining symbols of the X symbols using the originally configured parameters.

[0133] Fig. 10B 1050 is a diagram illustrating an example of dropping SRS symbols. UE 1 may correspond to UE 902, and UE 2 may correspond to UE 906. Fig. 10BAs illustrated, UE 1 discards the first symbol. UE 1 may discard the second symbol or change the cyclic shift or comb offset to avoid interference with the SRS symbol of UE 2.

[0134] Fig.11A 1100 is a diagram illustrating an example of dropping SRS symbols. UE 1 may correspond to UE 902, and UE 2 may correspond to UE 906. Fig.11A As illustrated, since symbols at different times are discarded, UE 1 and UE 2 may send the remaining symbols of the X symbols using the originally configured parameters.

[0135] Fig. 11B 1150 is a diagram illustrating an example of dropping SRS symbols. UE 1 may correspond to UE 902, and UE 2 may correspond to UE 906. Fig. 11B As illustrated, symbols at the same time are dropped, and these symbols may be associated with different antenna ports. The UE may also drop the second SRS symbol for both ports, transmit in one of the two ports, or change the cyclic shift or comb offset for one of the ports.

[0136] In some aspects, the UE 902 or UE 906 may determine between dropping or sending the remaining symbols of the SRS transmission based on the indication of SRS dropping operation (e.g., 908A) or the indication of SRS dropping operation (e.g., 908B).

[0137] In some aspects, UE 902 or UE 906 may determine between discarding or transmitting remaining symbols of the SRS transmission based at least in part on the priority of the SRS resources for SRS 914A or SRS 914B.

[0138] In some aspects, the UE 902 or UE 906 may determine between discarding or sending the remaining symbols of the SRS transmission based at least in part on the reason for discarding one or more symbols at 910. For example, the remaining symbols of the AP SRS may be sent with the original configured parameters, and the remaining symbols of the periodic SRS may be discarded. In some aspects, the priority of the SRS resource may also vary depending on whether the SRS resource is configured with a TD-OCC (e.g., if the conflicting SRS resources are all used for the UE and one of the conflicting SRS resources is configured with a TD-OCC). For example, if the ULCI causes the discard, the remaining symbols may be sent based on the original parameters. For example, because DCI formats 2-4 may indicate a set of symbols on which the SRS (or PUSCH) is canceled, the network entity 904 may (or may not) indicate the remaining symbols that are also to be discarded. In some aspects, there may be no reason to discard the remaining symbols. In some aspects, discarding or sending the remaining symbols of the SRS transmission may be defined for each of the discard reasons at 910. For example, discarding the remaining symbols, sending the remaining symbols with original parameters, or sending the remaining symbols with changed parameters may be defined for discarding based on each of the following: 1) overlapping in time with SSB symbols, 2) overlapping in time with dynamic DL signals or channels, 3) overlapping in time with other UL signals or channels with higher priority, 4) indicated to be cancelled based on an uplink cancellation indication (ULCI) (e.g., in DCI format 2_4), or 5) related to SFI. In some aspects, the UE 902 or UE 906 may determine between discarding or sending the remaining symbols of the SRS transmission differently based on different reasons for the discarding. For example, the UE may determine between discarding or sending the remaining symbols of the SRS transmission based on an indication of overlapping in time with the SSB symbols, and may determine between discarding or sending the remaining symbols of the SRS transmission based on the priority of the ULCI.

[0139] In some aspects, UE 902 or UE 906 may determine between discarding or transmitting the remaining symbols of the SRS transmission based at least in part on the usage of SRS 914A or SRS 914B. As an example, each SRS resource set may be configured with one of four usages (beam management, codebook, non-codebook, and antenna switching for DL ​​CSI acquisition that may be used for PUSCH). In some aspects, discarding or transmitting the remaining symbols of the SRS transmission may be defined for each of the usages.

[0140] In some aspects, for AP / SP / P SRS, UE 902 or UE 906 may determine between discarding or sending the remaining symbols of the SRS transmission differently. For example, UE 902 or UE 906 may determine between discarding or sending the remaining symbols of the SRS transmission based on indicating or at least in part based on the priority of different types of AP / SP / P SRS.

[0141] Fig.12 1200 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104, UE 702; device 1904). The method may provide a mechanism for the UE and the base station to determine a cyclic shift and / or comb offset based on whether the SRS port applies the same TD-OCC sequence or applies different TD-OCC sequences, so that the overall efficiency or capacity may be increased.

[0142] At 1202, the UE may receive a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports. For example, the UE 702 may receive a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports (e.g., 708). In some aspects, 1202 may be performed by the TD-OCC component 198.

[0143] At 1204, the UE may transmit the SRS on each of the plurality of SRS ports using one or more TD-OCC sequences according to the configuration. For example, the UE 702 may transmit the SRS on each of the plurality of SRS ports using one or more TD-OCC sequences according to the configuration (e.g., 712). In some aspects, 1204 may be performed by the TD-OCC component 198.

[0144] Fig.13 1300 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104, UE 702; device 1904). The method may provide a mechanism for the UE and the base station to determine a cyclic shift and / or comb offset based on whether the SRS port applies the same TD-OCC sequence or applies different TD-OCC sequences, so that the overall efficiency or capacity may be increased.

[0145] At 1301, the UE may indicate support for application of at least one of a single TD-OCC sequence across multiple SRS ports, multiple TD-OCC sequences across multiple SRS ports, or a maximum number of different TD-OCC sequences across multiple SRS ports. For example, the UE 702 may indicate (e.g., 706) support for application of at least one of a single TD-OCC sequence across multiple SRS ports, multiple TD-OCC sequences across multiple SRS ports, or a maximum number of different TD-OCC sequences across multiple SRS ports. In some aspects, 1301 may be performed by the TD-OCC component 198.

[0146] At 1302, the UE may receive a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports. For example, the UE 702 may receive a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports (e.g., 708). In some aspects, 1302 may be performed by the TD-OCC component 198. In some aspects, the multiple TD-OCC sequences include a first number of unique TD-OCC sequences to be applied to a third number of SRS ports on a second number of symbols based on at least one of the following: the first number of unique TD-OCC sequences is less than or equal to the third number of SRS ports, the first number of unique TD-OCC sequences is less than or equal to the second number of symbols, or the ratio of the third number of SRS ports to the first number of unique TD-OCC sequences is an integer. In some aspects, the configuration includes at least one of the following: a sequence configuration for each TD-OCC sequence in a plurality of TD-OCC sequences, an index from a defined set of sequences for each TD-OCC sequence in a plurality of TD-OCC sequences, or a single index from a defined set of sequences and the number of sequences.

[0147] At 1304, the UE may transmit an SRS on each of the multiple SRS ports using one or more TD-OCC sequences according to the configuration. For example, the UE 702 may transmit an SRS on each of the multiple SRS ports using one or more TD-OCC sequences according to the configuration (e.g., 712). In some aspects, 1304 may be performed by the TD-OCC component 198. As part of 1304, at 1306, the UE may use a cyclic shift or comb offset or apply a TD-OCC sequence. For example, the UE 702 may use a cyclic shift or comb offset or apply a TD-OCC sequence (e.g., at 710). In some aspects, 1306 may be performed by the TD-OCC component 198. In some aspects, the configuration indicates that the UE applies a single TD-OCC sequence across multiple SRS ports, and the UE may use the single TD-OCC sequence to transmit an SRS on each of the multiple SRS ports. In some aspects, the configuration instruction allows the UE to apply multiple TD-OCC sequences across multiple SRS ports, and the UE may use different TD-OCC sequences to send SRS on different SRS ports. In some aspects, the UE may use at least one of different cyclic shifts or different comb offsets for SRS transmissions using the same TD-OCC sequence across different SRS ports. In some aspects, the UE may use the same cyclic shift and the same comb offset for SRS transmissions using different TD-OCC sequences across multiple SRS ports. In some aspects, the configuration instruction allows the UE to apply a first number of TD-OCC sequences across a second number of SRS ports, and the UE may apply the same TD-OCC sequence among the first number of TD-OCC sequences for each SRS port in the group, the group being based on a set of consecutive port numbers or a set of port numbers sharing the same modulus based on the first number of TD-OCC sequences. In some aspects, the UE may use different cyclic shifts and the same comb offset for SRS transmission using the same TD-OCC sequence for a group including 2 SRS ports, use at least one of different cyclic shifts or different comb offsets for SRS transmission using the same TD-OCC sequence for a group including 4 SRS ports, or use the same cyclic shift and the same comb offset for the corresponding SRS ports in each group. In some aspects, the configuration indicates that the UE applies a first number of TD-OCC sequences across a second number of SRS ports, and the UE may apply a different TD-OCC sequence among the first number of TD-OCC sequences for each SRS port in the group, the group being based on a set of consecutive port numbers or a set of port numbers sharing the same modulus based on the first number of TD-OCC sequences.In some aspects, the UE may use the same cyclic shift and the same comb offset for SRS transmissions from each SRS port in the group, use different cyclic shifts and the same comb offset for SRS transmissions using the same TD-OCC sequence among 2 groups, or use at least one of different cyclic shifts or different comb offsets for SRS transmissions using the same TD-OCC sequence among 4 groups.

[0148] Fig.14 1400 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 entity 704, network entity 1902, network entity 2002). The method may provide a mechanism for a UE and a base station to determine a cyclic shift and / or a comb offset based on whether the SRS port applies the same TD-OCC sequence or applies different TD-OCC sequences, so that the overall efficiency or capacity may be increased.

[0149] At 1402, the network entity may output a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports. For example, the network entity 704 may output a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports (e.g., 708). In some aspects, 1402 may be performed by the TD-OCC component 199.

[0150] At 1404, the network entity may receive the SRS on each of the plurality of SRS ports using one or more TD-OCC sequences according to the configuration. For example, the network entity 704 may receive the SRS (e.g., 712) on each of the plurality of SRS ports using one or more TD-OCC sequences according to the configuration. In some aspects, 1404 may be performed by the TD-OCC component 199.

[0151] Fig.15 1500 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 entity 704, network entity 1902, network entity 1402). The method may provide a mechanism for a UE and a base station to determine a cyclic shift and / or a comb offset based on whether the SRS port applies the same TD-OCC sequence or applies different TD-OCC sequences, so that the overall efficiency or capacity may be increased.

[0152] At 1501, the network entity may obtain an indication that the UE supports at least one of a single TD-OCC sequence across multiple SRS ports, multiple TD-OCC sequences across multiple SRS ports, or a maximum number of different TD-OCC sequences across multiple SRS ports. For example, the network entity 704 may obtain an indication (e.g., 706) that the UE supports at least one of a single TD-OCC sequence across multiple SRS ports, multiple TD-OCC sequences across multiple SRS ports, or a maximum number of different TD-OCC sequences across multiple SRS ports. In some aspects, 1501 may be performed by the TD-OCC component 199.

[0153] At 1502, the network entity may output a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports. For example, the network entity 704 may output a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports (e.g., 708). In some aspects, 1502 may be performed by the TD-OCC component 199. In some aspects, the configuration indicates that the UE applies a single TD-OCC sequence across multiple SRS ports, and the SRS on each SRS port in the multiple SRS ports uses the single TD-OCC sequence. In some aspects, the configuration indicates that the UE applies multiple TD-OCC sequences across multiple SRS ports, and the SRS on different SRS ports use different TD-OCC sequences. In some aspects, the plurality of TD-OCC sequences include a first number of unique TD-OCC sequences to be applied to a third number of SRS ports on a second number of symbols based on at least one of: the first number of unique TD-OCC sequences is less than or equal to the third number of SRS ports, the first number of unique TD-OCC sequences is less than or equal to the second number of symbols, or the ratio of the number of SRS ports to the first number of unique TD-OCC sequences is an integer. In some aspects, the configuration includes at least one of: a sequence configuration for each TD-OCC sequence in the plurality of TD-OCC sequences, an index from a defined set of sequences for each TD-OCC sequence in the plurality of TD-OCC sequences, or a single index from a defined set of sequences and the number of sequences. In some aspects, the configuration instructs the UE to apply the first number of TD-OCC sequences across the second number of SRS ports, wherein the same TD-OCC sequence will be applied among the first number of TD-OCC sequences for each SRS port in the group, the group being based on: a set of consecutive port numbers, or a set of port numbers that share the same modulus based on the first number of TD-OCC sequences. In some aspects, the configuration instructs the UE to apply a first number of TD-OCC sequences across a second number of SRS ports, wherein a different TD-OCC sequence is applied among the first number of TD-OCC sequences for each SRS port within a group, where the group is based on a set of consecutive port numbers, or a set of port numbers that share the same modulus based on the first number of TD-OCC sequences.

[0154] At 1504, the network entity may receive an SRS on each of the multiple SRS ports using one or more TD-OCC sequences according to the configuration. For example, the network entity 704 may receive an SRS (e.g., 712) on each of the multiple SRS ports using one or more TD-OCC sequences according to the configuration. In some aspects, 1504 may be performed by the TD-OCC component 199. In some aspects, the SRS on the multiple SRS ports includes at least one of different cyclic shifts or different comb offsets for SRS transmissions using the same TD-OCC sequence across different SRS ports. In some aspects, the SRS on the multiple SRS ports includes the same cyclic shift and the same comb offset for SRS transmissions using different TD-OCC sequences across the multiple SRS ports. In some aspects, the SRS includes at least one of: different cyclic shifts and the same comb offset for SRS transmission using the same TD-OCC sequence for a group including 2 SRS ports, at least one of different cyclic shifts or different comb offsets for SRS transmission using the same TD-OCC sequence for a group including 4 SRS ports, or the same cyclic shift and the same comb offset for corresponding SRS ports in each group. In some aspects, the SRS includes at least one of: the same cyclic shift and the same comb offset for SRS transmission from each SRS port in the group, different cyclic shifts and the same comb offset for SRS transmission using the same TD-OCC sequence among 2 groups, or at least one of different cyclic shifts or different comb offsets for SRS transmission using the same TD-OCC sequence among 4 groups.

[0155] Fig.16 1600 is a flow chart of a method of wireless communication. The method may be performed by a UE (eg, UE 104, UE 902, UE 906; device 1904). The method may allow a network to flexibly control different SRS resources or behaviors of different UEs in various scenarios.

[0156] At 1602, the UE may drop one or more symbols from a set of symbols of an SRS transmission with TD-OCC, the SRS transmission including a cyclic shift and a comb offset. For example, the UE 902 may drop (e.g., at 910) one or more symbols from a set of symbols of an SRS transmission (e.g., 914A) with TD-OCC, the SRS transmission including a cyclic shift and a comb offset. In some aspects, 1602 may be performed by the TD-OCC component 198.

[0157] At 1604, the UE may determine to drop or send the remaining symbols of the SRS transmission. For example, the UE 902 may determine (e.g., at 912) to drop or send the remaining symbols of the SRS transmission. In some aspects, 1604 may be performed by the TD-OCC component 198.

[0158] Fig.17 1700 is a flow chart of a method of wireless communication. The method may be performed by a UE (eg, UE 104, UE 902, UE 906; device 1904). The method may allow a network to flexibly control different SRS resources or behaviors of different UEs in various scenarios.

[0159] At 1701, the UE may receive an indication for an SRS discard operation. For example, the UE 902 may receive an indication (e.g., 908A) for an SRS discard operation. In some aspects, 1701 may be performed by the TD-OCC component 198. In some aspects, the indication is included in the configuration of SRS resources for SRS transmission. In some aspects, the indication is included in at least one of a DCI or a MAC-CE.

[0160] At 1702, the UE may drop one or more symbols from a set of symbols of an SRS transmission with TD-OCC, the SRS transmission including a cyclic shift and a comb offset. For example, the UE 902 may drop (e.g., at 910) one or more symbols from a set of symbols of an SRS transmission (e.g., 914A) with TD-OCC, the SRS transmission including a cyclic shift and a comb offset. In some aspects, 1702 may be performed by the TD-OCC component 198.

[0161] At 1704, the UE may determine to discard or send the remaining symbols of the SRS transmission. For example, the UE 902 may determine (e.g., at 912) to discard or send the remaining symbols of the SRS transmission. In some aspects, 1704 may be performed by the TD-OCC component 198. In some aspects, the UE may determine to discard or send the remaining symbols of the SRS transmission based on the indication. In some aspects, the UE may determine to discard or send the remaining symbols of the SRS transmission based at least in part on the priority of the SRS resources used for the SRS transmission. In some aspects, the UE may determine to discard or send the remaining symbols of the SRS transmission based at least in part on the reason for discarding one or more symbols of the SRS transmission. In some aspects, the reason is one of the following: overlap in time with at least one of an SSB, a dynamically scheduled downlink signal or channel, an uplink channel with a higher priority than the SRS transmission, or a higher priority SRS transmission, an uplink cancellation indication (ULCI), or a conflict with a slot format indicator (SFI). In some aspects, the UE may determine to discard or send remaining symbols of the SRS transmission based at least in part on the usage of the SRS transmission. In some aspects, the UE may determine to discard or send remaining symbols of the SRS transmission based on one or more of: an indication from a network node, a priority of SRS resources used for the SRS transmission, a reason for discarding one or more symbols of the SRS transmission, or the usage of the SRS transmission.

[0162] At 1706A, the UE may transmit the remaining symbols of the SRS transmission. For example, the UE 902 may transmit the remaining symbols of the SRS transmission (e.g., 914A). In some aspects, 1706A may be performed by the TD-OCC component 198. In some aspects, the UE may transmit the remaining symbols of the SRS transmission using cyclic shifts and comb offsets. In some aspects, the UE may transmit the remaining symbols of the SRS transmission using one or more changed parameters. In some aspects, the one or more changed parameters include at least one of: skipping the transmission of the remaining symbols on a subset of the SRS ports, different cyclic shifts for the remaining symbols, different comb offsets for the remaining symbols, or skipping TD-OCC for the remaining symbols.

[0163] At 1706B, the UE may discard the remaining symbols of the SRS based on the indication. For example, the UE 902 may discard the remaining symbols of the SRS (eg, 914A) based on the indication. In some aspects, 1706B may be performed by the TD-OCC component 198.

[0164] Fig.181800 is a flow chart of a method of wireless communication. The method may be performed by a network node (eg, base station 102, network entity 904, network entity 1902, network entity 2002). The method may allow the network to flexibly control different SRS resources or behaviors of different UEs in various scenarios.

[0165] At 1802, the network node may configure SRS resources for SRS transmission with TD-OCC to the UE. For example, the network entity 904 may configure SRS resources (e.g., 907A or 907B) for SRS transmission with TD-OCC (e.g., 914A or 914B) to the UE (e.g., UE 902 or UE 906). In some aspects, 1802 may be performed by the TD-OCC component 199.

[0166] At 1804, the network node may provide an indication for the UE to discard or send the remaining symbols of the SRS transmission in response to discarding one or more symbols of the SRS transmission. For example, the network entity 904 may provide an indication (e.g., 908A or 908B) for the UE to discard or send the remaining symbols of the SRS transmission in response to discarding one or more symbols of the SRS transmission (e.g., at 910). In some aspects, 1804 may be performed by the TD-OCC component 199. In some aspects, the indication indicates that the UE performs one of the following: sending the remaining symbols of the SRS transmission using the same cyclic shift and the same comb offset, sending the remaining symbols of the SRS transmission using one or more changed parameters, or discarding the remaining symbols of the SRS based on the indication. In some aspects, the one or more changed parameters include at least one of the following: skipping the transmission of the remaining symbols on a subset of the SRS ports, different cyclic shifts for the remaining symbols, different comb offsets for the remaining symbols, or skipping TD-OCC for the remaining symbols. In some aspects, the indication is included in the configuration of the SRS resources for the SRS transmission. In some aspects, the indication is included in at least one of a DCI or an AMAC-CE. In some aspects, the indication instructs the UE to discard or transmit remaining symbols of the SRS transmission based on one or more of the following: a priority of SRS resources used for SRS transmission, a reason for discarding one or more symbols of the SRS transmission, or a use of the SRS transmission.

[0167] 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 management 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) / receiver (RX). In some aspects, the Bluetooth module, the WLAN module, and the SPS module may include their own dedicated antennas and / or may communicate using an antenna 1980. The cellular baseband processor 1924 communicates with the UE 104 and / or with 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 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, when executed by the cellular baseband processor 1924 / application processor 1906, enables the cellular baseband processor 1924 / application processor 1906 to perform the various functions described herein. The cellular baseband processor 1924 and the application processor 1906 are configured to perform the various functions described above based at least in part on the information stored in the memory.That is, the cellular baseband processor 1924 and the application processor 1906 may be configured to perform a first subset of the various functions described above without the information stored in the memory, and may be configured to perform a second subset of the various functions described above based on the information stored in the memory. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 1924 / application processor 1906 when executing software. The cellular baseband processor 1924 / application processor 1906 may be a component of the UE 350 and may include at least one 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 only include 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.

[0168] As discussed herein, the TD-OCC component 198 may be configured to receive a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports. In some aspects, the TD-OCC component 198 may also be configured to receive a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports. In some aspects, the TD-OCC component 198 may be configured to discard one or more symbols in a set of symbols for SRS transmission with TD-OCC, the SRS transmission including cyclic shift and comb offset. In some aspects, the TD-OCC component 198 may also be configured to determine whether to discard or transmit the remaining symbols of the SRS transmission. The OCC component 198 may be within the cellular baseband processor 1924, the application processor 1906, or both the cellular baseband processor 1924 and the application processor 1906. The TD-OCC component 198 may be one or more hardware components, which are 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 of the above. When multiple processors are implemented, the multiple processors may perform the process / algorithm individually or in combination. As shown, the device 1904 may include multiple components configured for various functions. In one configuration, the device 1904 (and in particular the cellular baseband processor 1924 and / or the application processor 1906) includes a component for receiving an instruction to allow the UE to apply one or more TD-OCC sequences across multiple SRS ports. In some aspects, the device 1904 may also include a component for transmitting SRS on each SRS port in multiple SRS ports using one or more TD-OCC sequences according to the configuration. In some aspects, the device 1904 may also include a component for indicating support for the application of at least one of a single TD-OCC sequence across multiple SRS ports, multiple TD-OCC sequences across multiple SRS ports, or a maximum number of different TD-OCC sequences across multiple SRS ports. In some aspects, the device 1904 may also include a component for transmitting at least one of different cyclic shifts or different comb offsets for SRS using the same TD-OCC sequence across different SRS ports. In some aspects, the apparatus 1904 may also include means for using the same cyclic shift and the same comb offset for SRS transmissions using different TD-OCC sequences across multiple SRS ports. In some aspects, the apparatus 1904 may also include means for applying the same TD-OCC sequence among the first number of TD-OCC sequences for each SRS port in the group. In some aspects, the apparatus 1904 may also include means for using different cyclic shifts and the same comb offset for SRS transmissions using the same TD-OCC sequence for a group including 2 SRS ports.In some aspects, the device 1904 may also include a component for using at least one of different cyclic shifts or different comb offsets for SRS transmissions using the same TD-OCC sequence for a group including 4 SRS ports. In some aspects, the device 1904 may also include a component for using the same cyclic shift and the same comb offset for the corresponding SRS port in each group. In some aspects, the device 1904 may also include a component for applying different TD-OCC sequences among the first number of TD-OCC sequences for each SRS port in the group. In some aspects, the device 1904 may also include a component for using the same cyclic shift and the same comb offset for SRS transmissions from each SRS port in the group. In some aspects, the device 1904 may also include a component for using different cyclic shifts and the same comb offset for SRS transmissions using the same TD-OCC sequence among 2 groups. In some aspects, the device 1904 may also include a component for using at least one of different cyclic shifts or different comb offsets for SRS transmissions using the same TD-OCC sequence among 4 groups. In one configuration, the device 1904 (and in particular the cellular baseband processor 1924 and / or the application processor 1906) includes a component for discarding one or more symbols of a set of symbols for SRS transmission with TD-OCC, the SRS transmission including a cyclic shift and a comb offset. In some aspects, the device 1904 may also include a component for determining between discarding or sending the remaining symbols of the SRS transmission. In some aspects, the device 1904 may also include a component for sending the remaining symbols of the SRS transmission using a cyclic shift and a comb offset. In some aspects, the device 1904 may also include a component for sending the remaining symbols of the SRS transmission using one or more changed parameters. In some aspects, the device 1904 may also include a component for receiving an indication of an SRS discard operation, wherein the UE determines between discarding or sending the remaining symbols of the SRS transmission based on the indication. In some aspects, the device 1904 may also include a component for discarding the remaining symbols of the SRS based on the indication. In some aspects, the component for determining between discarding and sending the remaining symbols of the SRS transmission is based at least in part on the priority of the SRS resources used for the SRS transmission. In some aspects, the component for determining between discarding and sending the remaining symbols of the SRS transmission is based at least in part on the reason for discarding one or more symbols of the SRS transmission. In some aspects, the component for determining between discarding and sending the remaining symbols of the SRS transmission is based at least in part on the use of the SRS transmission. In some aspects, the component for determining between discarding and sending the remaining symbols of the SRS transmission is based on one or more of the following: an indication from a network node, a priority of the SRS resources used for the SRS transmission, a reason for discarding one or more symbols of the SRS transmission, or the use of the SRS transmission.The means may be the TD-OCC component 198 of the apparatus 1904 configured to perform the functions recited by the means. As described herein, the apparatus 1904 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Thus, in one configuration, the means may be the TX processor 368, the RX processor 356, and / or the controller / processor 359 configured to perform the functions recited by the means.

[0169] Fig. 20 2000 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 the DU 2030 and the RU 2040; or the 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 herein. The computer readable medium / memory may also be used to store data manipulated by the processor when executing the software.

[0170] As discussed herein, the TD-OCC component 199 may be configured to output an indication that the UE applies one or more TD-OCC sequences across multiple SRS ports. In some aspects, the TD-OCC component 199 may also be configured to receive SRS on each of the multiple SRS ports using one or more TD-OCC sequences according to the configuration. The TD-OCC component 199 may be within one or more processors of one or more of the CU2010, DU2030, and RU 2040. In some aspects, the TD-OCC component 199 may be configured to configure the UE with SRS resources for SRS transmission with TD-OCC. In some aspects, the TD-OCC component 199 may also be configured to provide an indication of the UE discarding or sending the remaining symbols of the SRS transmission in response to discarding one or more symbols of the SRS transmission. The TD-OCC component 199 may be one or more hardware components that are 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 so as to be implemented by one or more processors, or some combination of the above. When multiple processors are implemented, the multiple processors may perform the process / algorithm individually or in combination. The network entity 2002 may include a variety of components configured for various functions. In one configuration, the network entity 2002 includes a component for outputting an indication that the UE applies one or more TD-OCC sequences across multiple SRS ports. In some aspects, the network entity 2002 may also include a component for receiving SRS on each SRS port in multiple SRS ports using one or more TD-OCC sequences according to the configuration. In some aspects, the network entity 2002 may also include a component for obtaining an indication that the UE supports the application of at least one of a single TD-OCC sequence across multiple SRS ports, multiple TD-OCC sequences across multiple SRS ports, or a maximum number of different TD-OCC sequences across multiple SRS ports. In one configuration, the network entity 2002 includes a component for configuring the UE with SRS resources for SRS transmission with TD-OCC. In some aspects, the network entity 2002 may also include a component for providing an indication to the UE to discard or transmit the remaining symbols of the SRS transmission in response to discarding one or more symbols of the SRS transmission. The component may be a TD-OCC component 199 of the network entity 2002 configured to perform the functions recorded by the component. As described herein, the network entity 2002 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Therefore, in one configuration, the component may be a TX processor 316, an RX processor 370, and / or a controller / processor 375 configured to perform the functions recorded by the component.

[0171] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is merely an illustration of an exemplary method. It should be understood that the specific order or hierarchy of the blocks in the process / flowchart may be rearranged based on design preferences. In addition, some blocks may be combined or omitted. The attached method claims provide the elements of the various blocks in a sample order, but are not limited to the specific order or hierarchy provided.

[0172] 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 may 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, references to singular elements do not mean "one and only one", but "one or more". Terms such as "if", "when" and "while" do not mean a direct temporal relationship or reaction. That is, these phrases, such as "when ......", do not mean immediate action in response to the occurrence of an action or during the occurrence of an action, but simply imply that if the conditions are met, the action will occur, but no specific or immediate time limit is required for the occurrence of the action. 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 advantages 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, which 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. When at least one processor is configured to perform a set of functions, the at least one processor is configured to perform the set of functions, either individually or in any combination. Thus, each of the at least one processor may be configured to perform a specific subset of a set of functions, where the subset is a complete set, a proper subset of a set, or an empty subset of a set. If a first device receives data from a second device or sends data to a second device, the data may be received / sent directly between the first device and the second device, or indirectly between the first device and the second device through a set of devices. A device configured to "output" data (such as a transmission, signal, or message) may, for example, send the data using a transceiver, or may transmit the data to a device that sends the data.A device configured to "obtain" data (such as, transmit, signal or message) may, for example, receive data with a transceiver, or may obtain the data from a device that receives the data. Information stored in a memory includes instructions and / or data. 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" 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..."

[0173] 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, conditions, factors, etc.) should be interpreted as "based at least on A" unless specifically stated differently.

[0174] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0175] Aspect 1 is a method for performing wireless communication at a UE, the method comprising: receiving a configuration indicating that the UE applies one or more TD-OCC sequences across multiple SRS ports; and sending an SRS on each of the multiple SRS ports using the one or more TD-OCC sequences according to the configuration.

[0176] Aspect 2 is a method according to aspect 1, wherein the configuration instructs the UE to apply a single TD-OCC sequence across the multiple SRS ports, wherein the UE sends the SRS on each of the multiple SRS ports using the single TD-OCC sequence.

[0177] Aspect 3 is a method according to aspect 1, wherein the configuration instructs the UE to apply multiple TD-OCC sequences across the multiple SRS ports, wherein the UE sends the SRS on different SRS ports using different TD-OCC sequences.

[0178] Aspect 4 is a method according to any one of Aspects 1 to 3, wherein the multiple TD-OCC sequences include a first number of unique TD-OCC sequences to be applied to a third number of SRS ports on a second number of symbols based on at least one of the following: the first number of the unique TD-OCC sequences is less than or equal to the third number of the SRS ports, the first number of the unique TD-OCC sequences is less than or equal to the second number of symbols, or the ratio of the third number of SRS ports to the first number of the unique TD-OCC sequences is an integer.

[0179] Aspect 5 is a method according to any one of Aspects 1 to 4, the method further comprising: indicating support for application of at least one of: a single TD-OCC sequence across the multiple SRS ports, multiple TD-OCC sequences across the multiple SRS ports, or a maximum number of different TD-OCC sequences across the multiple SRS ports.

[0180] Aspect 6 is a method according to any one of Aspects 1 to 5, wherein the configuration includes at least one of the following: a sequence configuration for each TD-OCC sequence in a plurality of TD-OCC sequences, an index from a defined set of sequences for each TD-OCC sequence in the plurality of TD-OCC sequences, or a single index from the defined set of sequences and the number of sequences.

[0181] Aspect 7 is a method according to any one of aspects 1 to 6, the method further comprising: using at least one of different cyclic shifts or different comb offsets for SRS transmission using the same TD-OCC sequence across different SRS ports.

[0182] Aspect 8 is a method according to any one of aspects 1 to 7, the method further comprising: using the same cyclic shift and the same comb offset for SRS transmission using different TD-OCC sequences across the multiple SRS ports.

[0183] Aspect 9 is a method according to any one of Aspects 1 to 8, wherein the configuration indicates that the UE applies a first number of TD-OCC sequences across a second number of SRS ports, and the method further includes: applying the same TD-OCC sequence among the first number of TD-OCC sequences for each SRS port in a group, and the group is based on: a set of consecutive port numbers, or a set of port numbers that share the same modulus based on the first number of TD-OCC sequences.

[0184] Aspect 10 is a method according to any one of Aspects 1 to 9, and the method also includes at least one of the following: using different cyclic shifts and the same comb offset for the SRS transmission using the same TD-OCC sequence for the group including 2 SRS ports, using at least one of the different cyclic shifts or different comb offsets for the SRS transmission using the same TD-OCC sequence for the group including 4 SRS ports, or using the same cyclic shift and the same comb offset for the corresponding SRS ports in each group.

[0185] Aspect 11 is a method according to any one of Aspects 1 to 10, wherein the configuration indicates that the UE applies a first number of TD-OCC sequences across a second number of SRS ports, and the method further includes: applying a different TD-OCC sequence among the first number of TD-OCC sequences for each SRS port in a group, and the group is based on: a set of consecutive port numbers, or a set of port numbers that share the same modulus based on the first number of TD-OCC sequences.

[0186] Aspect 12 is a method according to any one of Aspects 1 to 11, and the method also includes at least one of the following: using the same cyclic shift and the same comb offset for the SRS transmission from each SRS port in the group, using different cyclic shifts and the same comb offset for the SRS transmission using the same TD-OCC sequence among 2 groups, or using at least one of the different cyclic shifts or different comb offsets for the SRS transmission using the same TD-OCC sequence among 4 groups.

[0187] Aspect 13 is a method for performing wireless communications at a network node, the method comprising: outputting an indication for a UE to apply a configuration of one or more TD-OCC sequences across multiple SRS ports; and receiving an SRS on each of the multiple SRS ports using the one or more TD-OCC sequences according to the configuration.

[0188] Aspect 14 is a method according to aspect 13, wherein the configuration instructs the UE to apply a single TD-OCC sequence across the multiple SRS ports, and the SRS on each SRS port of the multiple SRS ports uses the single TD-OCC sequence.

[0189] Aspect 15 is a method according to aspect 13, wherein the configuration instructs the UE to apply multiple TD-OCC sequences across the multiple SRS ports, and the SRSs on different SRS ports use different TD-OCC sequences.

[0190] Aspect 16 is a method according to Aspect 15, wherein the multiple TD-OCC sequences include a first number of unique TD-OCC sequences to be applied to a third number of SRS ports on a second number of symbols based on at least one of the following: the first number of the unique TD-OCC sequences is less than or equal to the third number of the SRS ports, the first number of the unique TD-OCC sequences is less than or equal to the second number of symbols, or the ratio of the number of SRS ports to the first number of the unique TD-OCC sequences is an integer.

[0191] Aspect 17 is a method according to any one of Aspects 13 to 16, the method further comprising: obtaining an indication that the UE supports an application of at least one of: a single TD-OCC sequence across the multiple SRS ports, multiple TD-OCC sequences across the multiple SRS ports, or a maximum number of different TD-OCC sequences across the multiple SRS ports.

[0192] Aspect 18 is a method according to any one of Aspects 13 to 17, wherein the configuration includes at least one of: a sequence configuration for each TD-OCC sequence in a plurality of TD-OCC sequences, an index from a defined set of sequences for each TD-OCC sequence in the plurality of TD-OCC sequences, or a single index from the defined set of sequences and the number of sequences.

[0193] Aspect 19 is a method according to any one of aspects 13 to 18, wherein the SRS on the multiple SRS ports includes: at least one of different cyclic shifts or different comb offsets for SRS transmission using the same TD-OCC sequence across different SRS ports.

[0194] Aspect 20 is a method according to any one of aspects 13 to 19, wherein the SRS on the multiple SRS ports includes: the same cyclic shift and the same comb offset for SRS transmission using different TD-OCC sequences across the multiple SRS ports.

[0195] Aspect 21 is a method according to any one of Aspects 13 to 20, wherein the configuration indicates that the UE applies a first number of TD-OCC sequences across a second number of SRS ports, wherein the same TD-OCC sequence is applied among the first number of TD-OCC sequences for each SRS port in a group, and the group is based on: a set of consecutive port numbers, or a set of port numbers that share the same modulus based on the first number of TD-OCC sequences.

[0196] Aspect 22 is a method according to any one of Aspects 13 to 21, wherein the SRS includes at least one of the following: different cyclic shifts and the same comb offset for SRS transmission using the same TD-OCC sequence for the group including 2 SRS ports, at least one of the different cyclic shifts or different comb offsets for SRS transmission using the same TD-OCC sequence for the group including 4 SRS ports, or the same cyclic shift and the same comb offset for the corresponding SRS port in each group.

[0197] Aspect 23 is a method according to any one of Aspects 13 to 22, wherein the configuration indicates that the UE applies a first number of TD-OCC sequences across a second number of SRS ports, wherein a different TD-OCC sequence is applied among the first number of TD-OCC sequences for each SRS port in a group, and the group is based on: a set of consecutive port numbers, or a set of port numbers that share the same modulus based on the first number of TD-OCC sequences.

[0198] Aspect 24 is a method according to any one of Aspects 13 to 23, wherein the SRS includes at least one of: the same cyclic shift and the same comb offset for SRS transmission from each SRS port in the group, different cyclic shifts and the same comb offset for SRS transmission using the same TD-OCC sequence among 2 groups, or at least one of the different cyclic shifts or different comb offsets for SRS transmission using the same TD-OCC sequence among 4 groups.

[0199] Aspect 25 is an apparatus for performing wireless communications at a UE, the apparatus comprising: at least one memory; and at least one processor, the at least one processor being coupled to the at least one memory, and being configured, alone or in any combination, to perform a method according to any one of Aspects 1 to 12 based at least in part on information stored in the at least one memory.

[0200] Aspect 26 is an apparatus for wireless communication at a UE, the apparatus comprising: a component for performing each step in the method according to any one of aspects 1 to 12.

[0201] Aspect 27 is an apparatus according to any one of aspects 25 to 26, the apparatus further comprising a transceiver configured to receive or transmit in association with the method according to any one of aspects 1 to 12.

[0202] Aspect 28 is a computer-readable medium storing computer executable code at a UE, which, when executed by at least one processor, causes the at least one processor to perform the method according to any one of aspects 1 to 12.

[0203] Aspect 29 is a method for performing wireless communications at a UE, the method comprising: discarding one or more symbols from a set of symbols for SRS transmission with TD-OCC, the SRS transmission comprising a cyclic shift and a comb offset; and determining between discarding or sending the remaining symbols of the SRS transmission.

[0204] Aspect 30 is a method according to aspect 29, further comprising: transmitting the remaining symbols of the SRS transmission using the cyclic shift and the comb offset.

[0205] Aspect 31 is a method according to any one of aspects 29 to 30, the method further comprising: transmitting the remaining symbols of the SRS transmission using one or more changed parameters.

[0206] Aspect 32 is a method according to any one of Aspects 29 to 31, wherein the one or more changed parameters include at least one of: skipping the transmission of the remaining symbols on a subset of SRS ports, different cyclic shifts for the remaining symbols, different comb offsets for the remaining symbols, or skipping the TD-OCC for the remaining symbols.

[0207] Aspect 33 is a method according to any one of aspects 29 to 34, the method also including: receiving an indication for an SRS dropping operation, wherein the UE determines between dropping or sending the remaining symbols of the SRS transmission based on the configuration.

[0208] Aspect 34 is a method according to any one of aspects 29 and aspects 31 to 33, the method further comprising: discarding the remaining symbols of the SRS based on the indication.

[0209] Aspect 35 is a method according to any one of aspects 29 to 34, wherein the indication is included in the configuration of SRS resources for the SRS transmission.

[0210] Aspect 36 is a method according to any one of aspects 29 to 35, wherein the indication is included in at least one of a DCI or a MAC-CE.

[0211] Aspect 37 is a method according to any one of aspects 29 to 36, wherein determining between discarding and transmitting the remaining symbols of the SRS transmission is based at least in part on a priority of SRS resources used for the SRS transmission.

[0212] Aspect 38 is a method according to any one of aspects 29 to 37, wherein determining between discarding and transmitting the remaining symbols of the SRS transmission is based at least in part on a reason for discarding the one or more symbols of the SRS transmission.

[0213] Aspect 39 is a method according to any one of Aspects 29 to 38, wherein the cause is one of the following: temporal overlap with at least one of an SSB, a dynamically scheduled downlink signal or channel, an uplink channel having a higher priority than the SRS transmission, or a higher priority SRS transmission, ULCI, or a conflict with SFI.

[0214] Aspect 40 is a method according to any one of aspects 29 to 39, wherein determining between discarding and transmitting the remaining symbols of the SRS transmission is based at least in part on usage of the SRS transmission.

[0215] Aspect 41 is a method according to any one of Aspects 29 to 40, wherein the determination between discarding and sending the remaining symbols of the SRS transmission is based on one or more of the following: an indication from a network node, a priority of the SRS resources used for the SRS transmission, a reason for discarding the one or more symbols of the SRS transmission, or a use of the SRS transmission.

[0216] Aspect 42 is a method for performing wireless communications at a network node, the method comprising: configuring SRS resources for SRS transmission with TD-OCC to the UE; and in response to discarding one or more symbols of the SRS transmission, providing an indication to the UE to discard or transmit the remaining symbols of the SRS transmission.

[0217] Aspect 43 is a method according to aspect 42, wherein the indication instructs the UE to perform one of the following: sending the remaining symbols of the SRS transmission using the same cyclic shift and the same comb offset, sending the remaining symbols of the SRS transmission using one or more changed parameters, or discarding the remaining symbols of the SRS based on the indication.

[0218] Aspect 44 is a method according to any one of Aspects 42 to 43, wherein the one or more changed parameters include at least one of: skipping the transmission of the remaining symbols on a subset of SRS ports, different cyclic shifts for the remaining symbols, different comb offsets for the remaining symbols, or skipping the TD-OCC for the remaining symbols.

[0219] Aspect 45 is a method according to any one of aspects 42 to 44, wherein the indication is included in the configuration of SRS resources for the SRS transmission.

[0220] Aspect 46 is a method according to any one of aspects 42 to 45, wherein the indication is included in at least one of a DCI or a MAC-CE.

[0221] Aspect 47 is a method according to any one of Aspects 42 to 46, wherein the indication instructs the UE to discard or send the remaining symbols of the SRS transmission based on one or more of the following: the priority of the SRS resources used for the SRS transmission, the reason for discarding the one or more symbols of the SRS transmission, or the use of the SRS transmission.

[0222] Aspect 48 is an apparatus for performing wireless communications at a network node, the apparatus comprising: at least one memory; and at least one processor, the at least one processor being coupled to the at least one memory and being configured, alone or in any combination, to perform a method according to any one of Aspects 13 to 24 and Aspects 42 to 47 based at least in part on information stored in the at least one memory.

[0223] Aspect 49 is an apparatus for wireless communication at a network node, the apparatus comprising means for performing each step of the method according to any one of aspects 13 to 24 and aspects 42 to 47.

[0224] Aspect 50 is an apparatus according to any one of aspects 48 to 49, the apparatus further comprising a transceiver configured to receive or transmit in association with the method according to any one of aspects 13 to 24 and aspects 42 to 47.

[0225] Aspect 51 is a computer readable medium storing computer executable code at a network node, which, when executed by at least one processor, causes the at least one processor to perform a method according to any one of aspects 13 to 24 and aspects 42 to 47.

[0226] Aspect 52 is an apparatus for performing wireless communications at a UE, the apparatus comprising: at least one memory; and at least one processor, the at least one processor being coupled to the at least one memory, and being configured, alone or in any combination, to perform a method according to any one of Aspects 1 to 12 and Aspects 29 to 41 based at least in part on information stored in the at least one memory.

[0227] Aspect 53 is an apparatus for wireless communication at a UE, the apparatus comprising means for performing each step of the method according to any one of aspects 1 to 12 and aspects 29 to 41.

[0228] Aspect 54 is an apparatus according to any one of aspects 52 to 53, the apparatus further comprising a transceiver configured to receive or transmit in association with the method according to any one of aspects 1 to 12 and aspects 29 to 41.

[0229] Aspect 55 is a computer-readable medium storing computer executable code at a UE, which, when executed by at least one processor, causes the at least one processor to perform a method according to any one of aspects 1 to 12 and aspects 29 to 41.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: at least one memory; and at least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor individually or in combination configured to cause the apparatus to: receiving a configuration indicating that the UE applies one or more time domain orthogonal cover code (TD-OCC) sequences across a plurality of sounding reference signal (SRS) ports; as well as An SRS is transmitted on each of the plurality of SRS ports using the one or more TD-OCC sequences according to the configuration.

2. The apparatus according to claim 1, wherein the configuration instructs the UE to apply a single TD-OCC sequence across the multiple SRS ports, wherein the at least one processor is further configured to cause the apparatus to: send the SRS on each of the multiple SRS ports using the single TD-OCC sequence.

3. The apparatus according to claim 1, wherein the configuration instructs the UE to apply multiple TD-OCC sequences across the multiple SRS ports, wherein the at least one processor is further configured to cause the apparatus to: send the SRS on different SRS ports using different TD-OCC sequences.

4. The apparatus of claim 3, wherein the plurality of TD-OCC sequences comprises a first number of unique TD-OCC sequences to be applied to a third number of SRS ports over a second number of symbols based on at least one of: The first number of the unique TD-OCC sequences is less than or equal to the third number of the SRS ports, The first number of the unique TD-OCC sequences is less than or equal to the second number of symbols, or A ratio of the third number of SRS ports to the first number of the unique TD-OCC sequences is an integer.

5. The apparatus of claim 1 , wherein the at least one processor is further configured to cause the apparatus to: Indicates support for the application of at least one of the following: a single TD-OCC sequence across the plurality of SRS ports, a plurality of TD-OCC sequences across the plurality of SRS ports, or a maximum number of different TD-OCC sequences across the plurality of SRS ports.

6. The apparatus of claim 1, wherein the configuration comprises at least one of: For a sequence configuration of each TD-OCC sequence in a plurality of TD-OCC sequences, an index from a defined set of sequences for each TD-OCC sequence in the plurality of TD-OCC sequences, or A single index from the defined set of sequences and the number of sequences.

7. The apparatus of claim 1 , wherein the at least one processor is further configured to cause the apparatus to: At least one of different cyclic shifts or different comb offsets are used for SRS transmission using the same TD-OCC sequence across different SRS ports.

8. The apparatus of claim 1, wherein the at least one processor is further configured to cause the apparatus to: The same cyclic shift and the same comb offset are used for SRS transmission using different TD-OCC sequences across the multiple SRS ports.

9. The apparatus of claim 1, wherein the configuration instructs the UE to apply a first number of TD-OCC sequences across a second number of SRS ports, wherein the at least one processor is further configured to cause the apparatus to: Applying the same TD-OCC sequence among the first number of TD-OCC sequences for each SRS port in a group, the group being based on: a collection of consecutive port numbers, or A set of port numbers sharing a same modulus based on the first number of the TD-OCC sequences.

10. The apparatus of claim 9, wherein the at least one processor is further configured to cause the apparatus to: SRS transmission using the same TD-OCC sequence for a group including 2 SRS ports uses different cyclic shifts and the same comb offset, The SRS transmission using the same TD-OCC sequence for a group of 4 SRS ports uses at least one of the different cyclic shifts or different comb offsets, or uses the same cyclic shift and the same comb offset for corresponding SRS ports in each group.

11. The apparatus of claim 1 , wherein the configuration instructs the UE to apply a first number of TD-OCC sequences across a second number of SRS ports, wherein the at least one processor is further configured to cause the apparatus to: applying a different TD-OCC sequence among the first number of TD-OCC sequences for each SRS port in a group, the group being based on: a collection of consecutive port numbers, or A set of port numbers sharing a same modulus based on the first number of the TD-OCC sequences.

12. The apparatus of claim 11, wherein the at least one processor is further configured to cause the apparatus to: using the same cyclic shift and the same comb offset for SRS transmission from each SRS port in the group, using different cyclic shifts and the same comb offset for the SRS transmission using the same TD-OCC sequence in two groups, or At least one of the different cyclic shifts or different comb offsets is used for the SRS transmission using the same TD-OCC sequence among 4 groups.

13. An apparatus for wireless communication at a network node, the apparatus comprising: at least one memory; and at least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor individually or in combination configured to cause the apparatus to: The output indicates a configuration for a user equipment (UE) to apply one or more time domain orthogonal cover code (TD-OCC) sequences across a plurality of sounding reference signal (SRS) ports; as well as An SRS is received on each of the plurality of SRS ports using the one or more TD-OCC sequences according to the configuration. 14 . The apparatus according to claim 13 , wherein the configuration instructs the UE to apply a single TD-OCC sequence across the multiple SRS ports, and the SRS on each SRS port in the multiple SRS ports uses the single TD-OCC sequence. 15 . The apparatus according to claim 13 , wherein the configuration instructs the UE to apply multiple TD-OCC sequences across the multiple SRS ports, and the SRSs on different SRS ports use different TD-OCC sequences.

16. The apparatus of claim 13, wherein the plurality of TD-OCC sequences comprises a first number of unique TD-OCC sequences to be applied to a third number of SRS ports over a second number of symbols based on at least one of: The first number of the unique TD-OCC sequences is less than or equal to the third number of the SRS ports, The first number of the unique TD-OCC sequences is less than or equal to the second number of symbols, or A ratio of the number of SRS ports to the first number of the unique TD-OCC sequences is an integer.

17. The apparatus of claim 13, wherein the at least one processor is further configured to cause the apparatus to: Obtaining an indication that the UE supports an application of at least one of the following: a single TD-OCC sequence across the plurality of SRS ports, a plurality of TD-OCC sequences across the plurality of SRS ports, or a maximum number of different TD-OCC sequences across the plurality of SRS ports.

18. The apparatus of claim 13, wherein the configuration comprises at least one of: For a sequence configuration of each TD-OCC sequence in a plurality of TD-OCC sequences, an index from a defined set of sequences for each TD-OCC sequence in the plurality of TD-OCC sequences, or A single index from the defined set of sequences and the number of sequences.

19. The apparatus of claim 13, wherein the SRS on the plurality of SRS ports comprises: At least one of different cyclic shifts or different comb offsets for SRS transmission using the same TD-OCC sequence across different SRS ports.

20. The apparatus of claim 13, wherein the SRS on the plurality of SRS ports comprises: The same cyclic shift and the same comb offset are used for SRS transmission using different TD-OCC sequences across the multiple SRS ports.

21. The apparatus of claim 13, wherein the configuration instructs the UE to apply a first number of TD-OCC sequences across a second number of SRS ports, wherein the same TD-OCC sequence is to be applied among the first number of TD-OCC sequences for each SRS port in a group, the group being based on: a collection of consecutive port numbers, or A set of port numbers sharing a same modulus based on the first number of the TD-OCC sequences.

22. The apparatus of claim 21, wherein the SRS comprises at least one of: different cyclic shifts and the same comb offset for SRS transmission using the same TD-OCC sequence for a group including 2 SRS ports, at least one of the different cyclic shifts or different comb offsets for the SRS transmission using the same TD-OCC sequence for a group including 4 SRS ports, or The same cyclic shift and the same comb offset are used for the corresponding SRS ports in each group.

23. The apparatus of claim 13, wherein the configuration instructs the UE to apply a first number of TD-OCC sequences across a second number of SRS ports, wherein a different TD-OCC sequence is to be applied among the first number of TD-OCC sequences for each SRS port in a group, the group being based on: a collection of consecutive port numbers, or A set of port numbers sharing a same modulus based on the first number of the TD-OCC sequences.

24. The apparatus of claim 23, wherein the SRS comprises at least one of: the same cyclic shift and the same comb offset for SRS transmissions from each SRS port in the group, different cyclic shifts and the same comb offset for the SRS transmission using the same TD-OCC sequence among 2 groups, or At least one of the different cyclic shifts or different comb offsets for the SRS transmission using the same TD-OCC sequence among 4 groups.

25. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: at least one memory; and at least one processor coupled to the at least one memory and based at least in part on information stored in the at least one memory, the at least one processor configured to cause the apparatus to: Dropping one or more symbols from a set of symbols for a sounding reference signal (SRS) transmission with a time domain orthogonal cover code (TD-OCC), the SRS transmission including a cyclic shift and a comb offset; as well as Determine whether to discard or transmit the remaining symbols of the SRS transmission.

26. The apparatus of claim 25, wherein the at least one processor is further configured to cause the apparatus to: The remaining symbols of the SRS transmission are transmitted using the cyclic shift and the comb offset.

27. The apparatus of claim 25, wherein the at least one processor is further configured to cause the apparatus to: The remaining symbols of the SRS transmission are transmitted using one or more changed parameters.

28. The apparatus of claim 27, wherein the one or more changed parameters include at least one of: skipping transmission for the remaining symbols on a subset of SRS ports, For different cyclic shifts of the remaining symbols, different comb offsets for the remaining symbols, or The TD-OCC for the remaining symbols is skipped.

29. The apparatus of claim 25, wherein the at least one processor is further configured to cause the apparatus to: An indication for an SRS dropping operation is received, wherein the at least one processor is further configured to cause the apparatus to determine whether to drop or send the remaining symbols of the SRS transmission based on the indication.

30. An apparatus for wireless communication at a network node, the apparatus comprising: at least one memory; and at least one processor coupled to the at least one memory and based at least in part on information stored in the at least one memory, the at least one processor configured to cause the apparatus to: configuring a user equipment (UE) with a sounding reference signal (SRS) resource for SRS transmission with a time domain orthogonal cover code (TD-OCC); and In response to discarding one or more symbols of the SRS transmission, providing an instruction for the UE to discard or transmit remaining symbols of the SRS transmission.

Images