WO2021173192A1 - Partial srs resource bundling and transmission property adjustment - Google Patents

Abstract

A configuration for improving the manner in which a receiver may infer the channel of a PUCCH from the channel of the SRS. The apparatus receives, from a base station, a configuration having at least one SRS resource and an associated PUCCH resource. The apparatus determines if the at least one SRS resource is in a symbol adjacent to the associated PUCCH resource. The apparatus adjusts SRS transmission properties of the at least one SRS resource upon the determination that the at least one SRS resource and the associated PUCCH resource are in adjacent symbols.

Description

PARTIAL SRS RESOURCE BUNDLING AND TRANSMISSION PROPERTY ADJUSTMENT

CROSS REFERENCE TO RELATED APPLICATION(S)

[0001] This application claims the benefit of Greek Application No. 20200100109, entitled “Partial SRS Resource Bundling and Transmission Property Adjustment” and filed on February 27, 2020, which is expressly incorporated by reference herein in its entirety.

BACKGROUND

Technical Field

[0002] The present disclosure relates generally to communication systems, and more particularly, to a configuration for partial SRS resource bundling and transmission property adjustment.

Introduction

[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. 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.

[0004] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with 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). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies.

SUMMARY

[0005] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate 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 the more detailed description that is presented later.

[0006] In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a UE. The device may be a processor and/or a modem at a UE or the UE itself. The apparatus receives, from a base station, a configuration having at least one sounding reference signals (SRS) resource and an associated physical uplink control channel (PUCCH) resource. The apparatus determines if the at least one SRS resource is in a symbol adjacent to the associated PUCCH resource. The apparatus adjusts SRS transmission properties of the at least one SRS resource upon the determination that the at least one SRS resource and the associated PUCCH resource are in adjacent symbols.

[0007] In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a base station. The device may be a processor and/or a modem at a base station or the base station itself. The apparatus configures a configuration having at least one SRS resource and an associated PUCCH resource. The apparatus transmits the configuration to a user equipment (UE). The apparatus receives, from the UE, at least one SRS and an associated PUCCH based at least on the configuration.

[0008] To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.

[0010] FIG. 2A is a diagram illustrating an example of a first frame, in accordance with various aspects of the present disclosure.

[0011] FIG. 2B is a diagram illustrating an example of DL channels within a subframe, in accordance with various aspects of the present disclosure.

[0012] FIG. 2C is a diagram illustrating an example of a second frame, in accordance with various aspects of the present disclosure.

[0013] FIG. 2D is a diagram illustrating an example of UL channels within a subframe, in accordance with various aspects of the present disclosure.

[0014] FIG. 3 is a diagram illustrating an example of abase station and user equipment (UE) in an access network.

[0015] FIG. 4 is a diagram illustrating an example of an SRS resource.

[0016] FIG. 5 is a diagram illustrating an example of a set of SRS resources.

[0017] FIG. 6 is a diagram illustrating an example of adjusted SRS transmission properties in accordance with certain aspects of the disclosure.

[0018] FIG. 7 is a diagram illustrating an example of adjusted SRS transmission properties in accordance with certain aspects of the disclosure.

[0019] FIG. 8 is a diagram illustrating an example of adjusted SRS transmission properties in accordance with certain aspects of the disclosure.

[0020] FIG. 9 is a diagram illustrating an example of adjusted SRS transmission properties in accordance with certain aspects of the disclosure.

[0021] FIG. 10 is a diagram illustrating an example of adjusted SRS transmission properties in accordance with certain aspects of the disclosure.

[0022] FIG. 11 is a diagram illustrating an example of adjusted SRS transmission properties in accordance with certain aspects of the disclosure. [0023] FIG. 12 is a call flow diagram of signaling between a UE and a base station.

[0024] FIG. 13 is a flowchart of a method of wireless communication.

[0025] FIG. 14 is a diagram illustrating an example of a hardware implementation for an example apparatus.

[0026] FIG. 15 is a flowchart of a method of wireless communication.

[0027] FIG. 16 is a diagram illustrating an example of a hardware implementation for an example apparatus.

DETAILED DESCRIPTION

[0028] The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts.

[0029] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be 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 upon the particular application and design constraints imposed on the overall system.

[0030] By way of example, an element, or any portion of an element, or any combination of elements may be implemented as a “processing system” that 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 a chip (SoC), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0031] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned 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.

[0032] FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network 100. The wireless communications system (also referred to as a wireless wide area network (WWAN)) includes base stations 102, UEs 104, an Evolved Packet Core (EPC) 160, and another core network 190 (e.g., a 5G Core (5GC)). The base stations 102 may include macrocells (high power cellular base station) and/or small cells (low power cellular base station). The macrocells include base stations. The small cells include femtocells, picocells, and microcells.

[0033] The base stations 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 through first backhaul links 132 (e.g., SI interface). The base stations 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with core network 190 through second backhaul links 184. In addition to other functions, the base stations 102 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment trace, RAN information management (RIM), paging, positioning, and delivery of warning messages. The base stations 102 may communicate directly or indirectly (e.g., through the EPC 160 or core network 190) with each other over third backhaul links 134 (e.g., X2 interface). The first backhaul links 132, the second backhaul links 184, and the third backhaul links 134 may be wired or wireless.

[0034] The base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102' may have a coverage area 110' that overlaps the coverage area 110 of one or more macro base stations 102. A network that includes both small cell and macrocells may be known as a heterogeneous network. A heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs), which may provide service to a restricted group known as a closed subscriber group (CSG). The communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from abase station 102 to aUE 104. The communication links 120 may use multiple- in put and multiple -output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity. The communication links may be through one or more carriers. The base stations 102 / UEs 104 may use spectrum up to 7MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respectto DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL). The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell). [0035] Certain UEs 104 may communicate with each other using device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL/UL 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 through a variety of wireless D2D communications systems, such as for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0036] The wireless communications system may further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154, e.g., in a 5 GHz unlicensed frequency spectrum or the like. When communicating in an unlicensed frequency spectrum, the STAs 152 / AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.

[0037] The small cell 102' may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102' may employ NR and use the same unlicensed frequency spectrum (e.g., 5 GHz, or the like) as used by the Wi-Fi AP 150. The small cell 102', employing NRin an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.

[0038] The electromagnetic spectrum is often subdivided, based on frequency/wavelength, into various classes, bands, channels, etc. 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). The frequencies between FR1 and FR2 are often referredto as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.

[0039] With the above aspects in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, or may be within the EHF band.

[0040] Abase station 102, whether a small cell 102' or a large cell (e.g., macro base station), may include and/or be referred to as an eNB, gNodeB (gNB), or another type of base station. Some base stations, such as gNB 180 may operate in a traditional sub 6 GHz spectrum, in millimeter wave frequencies, and/or near millimeter wave frequencies in communication with the UE 104. When the gNB 180 operates in millimeter wave or near millimeter wave frequencies, the gNB 180 may be referred to as a millimeter wave base station. The millimeter wave base station 180 may utilize beamforming 182 with the UE 104 to compensate for the path loss and short range. The base station 180 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming.

[0041] The base station 180 may transmit abeamformed signal to the UE 104 in one or more transmit directions 182'. The UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182". The UE 104 may also transmit a beamformed signal to the base station 180 in one or more transmit directions. The base station 180 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 180 / UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 180 / UE 104. The transmit and receive directions for the base station 180 may or may not be the same. The transmit and receive directions for the UE 104 may or may not be the same.

[0042] The EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may be in communication with a Home Subscriber Server (HSS) 174. The MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160. Generally, the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway 166, which itself is connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation as well as other functions. The PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176. The IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and/or other IP services. The BM-SC 170 may provide functions for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information.

[0043] The core network 190 may include a Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and aUser Plane Function (UPF) 195. The AMF 192 may be in communication with a Unified Data Management (UDM) 196. The AMF 192 is the control node that processes the signaling between the UEs 104 and the core network 190. Generally, the AMF 192 provides QoS flow and session management. All user Internet protocol (IP) packets are transferred through the UPF 195. The UPF 195 provides UEIP address allocation as well as other functions. The UPF 195 is connected to the IP Services 197. The IP Services 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a Packet Switch (PS) Streaming (PSS) Service, and/or other IP services.

[0044] The base station may include and/or be referred to as a gNB, Node B, eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit reception point (TRP), or some other suitable terminology. The base station 102 provides an access point to the EPC 160 or core network 190 for a UE 104. Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, amultimedia device, a video device, adigital audio player (e.g., MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc.). The UE 104 may also be referredto as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0045] Referring again to FIG. 1, in certain aspects, the UE 104 may be configured to adjust transmission properties of SRS resources under certain situations. For example, UE 104 may comprise an adjust component 198 configured to adjust transmission properties of SRS resources. The UE 104 receives, from a base station 102/180, a configuration having at least one SRS resource and an associated PUCCH resource. The UE 104 determines if the at least one SRS resource is in a symbol adjacent to the associated PUCCH resource. The UE 104 adjusts SRS transmission properties of the at least one SRS resource upon the determination that the at least one SRS resource and the associated PUCCH resource are in adjacent symbols.

[0046] Referring again to FIG. 1, in certain aspects, the base station 180 may be configured to provide a configuration to a UE 104. For example, the base station 180 may comprise a configuration component 199 configured to generate a configuration. The base station 180 configures a configuration having at least one SRS resource and an associated PUCCH resource. The base station 180 transmits the configuration to a UE 104. The base station 180 receives, from the UE 104, at least one SRS and an associated PUCCH based at least on the configuration. The at least one SRS may be adjusted by the UE, such that one or more transmission properties of the at least one SRS is the same as the associated PUCCH in order to assist in the base station 180 inferring the channel of the PUCCH from the channel of the SRS.

[0047] Although the following description may be focused on 5GNR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0048] FIG. 2A is a diagram 200 illustrating an example of a first subframe within a 5G NR frame structure. FIG. 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe. FIG. 2C is a diagram 250 illustrating an example of a second subframe within a 5G NR frame structure. FIG. 2D is a diagram 280 illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplexed (FDD) in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplexed (TDD) in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for both DL and UL. In the examples provided by FIGs. 2A, 2C, the 5G NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL), where D is DL, U is UL, and F is flexible for use between DL/UL, and subframe 3 being configured with slot format 1 (with all UL). While subframes 3, 4 are shown with slot formats 1, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. UEs are configured with the slot format (dynamically through DL control information (DCI), or semi- statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI). Note that the description infra applies also to a 5G NR frame structure that is TDD.

[0049] Other wireless communication technologies may have a different frame structure and/or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. Each slot may include 7 or 14 symbols, depending on the slot configuration. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols. The symbols on DL may be cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) (CP -OFDM) symbols. The symbols on UL may be CP -OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission). The number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration 0, different numerologies m 0 to 4 allow for 1, 2, 4, 8, and 16 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology m, there are 14 symbols/slot and 2r slots/subframe. The subcarrier spacing and symbol length/duration are a function of the numerology. The subcarrier spacing may be equal to 2^m * 15 kHz, where m is the numerology 0 to 4. As such, the numerology m=0 has a subcarrier spacing of 15 kHz and the numerology m=4 has a subcarrier spacing of 240 kHz. The symbol length/duration is inversely related to the subcarrier spacing. FIGs. 2A-2D provide an example of slot configuration 0 with 14 symbols per slot and numerology m=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 ps. Within a set of frames, there may be one or more different bandwidth parts (BWPs) (see FIG. 2B) that are frequency division multiplexed. Each BWP may have a particular numerology.

[0050] A resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs)) that extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0051] As illustrated in FIG. 2A, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include demodulation RS (DM-RS) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS may also include beam measurement RS (BRS), beam refinement RS (BRRS), and phase tracking RS (PT-RS).

[0052] FIG. 2B illustrates an example of various DL channels within a subframe of a frame.

The 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 one BWP may be referred to as a control resource set (CORESET). A UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during PDCCH monitoring occasions on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at greater and/or lower frequencies across the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe/symbol timing and a physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI). Based on the PCI, the UE can determine the locations of the aforementioned DM-RS. The physical broadcast channel (PBCH), which carries a master information block (MIB), may be logically grouped with the PSS and SSS to form a synchronization signal (SS)/PBCH block (also referred to as SS block (SSB)). The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN). The physical downlink shared channel (PD SCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs), and paging messages.

[0053] As illustrated in FIG. 2C, some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. The UE may transmit sounding reference signals (SRS). The SRS may be transmitted in the last symbol of a subframe. The SRS may have a comb structure, and a UE may transmit SRS on one of the combs. The SRS may be used by a base station for channel quality estimation to enable frequency- dependent scheduling on the UL.

[0054] FIG. 2D illustrates an example of various UL channels within a subframe of a frame.

The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and hybrid automatic repeat request (HARQ) acknowledgment (ACK) (HARQ-ACK) information (ACK / negative ACK (NACK)) feedback. The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and/or UCI.

[0055] FIG. 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In the DL, IP packets from the EPC 160 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, SIBs), 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 (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with the transfer 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.

[0056] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/ demodulation of physical channels, and MIMO antenna processing. The TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BP SK), quadrature phase-shift keying (QPSK),M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 350 Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318 TX. Each transmitter 318 TXmay modulate an RF carrier with a respective spatial stream for transmission.

[0057] At the UE 350, each receiver 354 RX receives a signal through its respective antenna 352. Each receiver 354 RX recovers information modulated onto an RF carrier and provides the information to the 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 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream. 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 comprises 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 points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel. The data and control signals are then provided to the controller/processor 359, which implements layer 3 and layer 2 functionality.

[0058] The controller/processor 359 can be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller/processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller/processor 359 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.

[0059] Similar to the functionality described in connection with the DL transmission by the base station 310, the controller/processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (ciphering, deciphering, integrity protection, integrity verification); RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC 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 TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0060] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.

[0061] The UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver function 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 a RX processor 370.

[0062] The controller/processor 375 can be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller/processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 350. IP packets from the controller/processor 375 may be provided to the EPC 160. The controller/processor 375 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.

[0063] At least one of the TX processor 368, the RX processor 356, and the controller/processor 359 may be configured to perform aspects in connection with 198 of FIG. 1.

[0064] At least one of the TX processor 316, the RX processor 370, and the controller/processor 375 may be configured to perform aspects in connection with 199 of FIG. 1.

[0065] Wireless communication systems that support NR may support NR SRS resources.

NR SRS resources may span 1, 2, or 4 adjacent symbols of a slot with up to four ports per SRS resource. All ports of an SRS resource may be sounded in each symbol. With reference to the slot 400 of FIG. 4, an SRS 402 may be transmitted in the last 6 symbols of a slot 400. An SRS may be transmitted after the PUSCH in such slot.

[0066] An SRS resource set 502, 504, as shown in the example 500 of FIG. 5, may contain a set of SRS resources 506, 508, 510, 512 transmitted by a UE. An SRS resource set 502, 504 may be transmitted aperiodic (e.g., DCI signaled), semi-persistent, or periodic. A UE may be configured with multiple resources, which may be grouped in an SRS resource set depending on the use case (e.g., antenna switching, codebook- based, non-codebook based, beam management). SRS transmission by the UE may be via wideband or subband. In some instances, the SRS bandwidth may be configured in multiples of 4 physical resource blocks (PRBs).

[0067] NR communication systems may support a simple form of PUCCH and SRS association. In a PUCCH configuration, a spatial relation information field may be configured to allow for the PUCCH and the SRS resource to utilize the same spatial filters (e.g., the same transmit or receive beam). This association between the PUCCH and SRS may also be known as quasi co-located (QCL) type D. For example, two antennas ports are said to be QCL if the large-scale properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. This association may assist the power control and the PUCCH detection at the base station. Some service types (e.g., ultra-reliable low-latency services), the reliability requirement for PUCCH may be higher than the requirement for other service types (e.g., eMBB).

[0068] Another type of QCL association is QCL-TypeA association. In QCL-TypeA association, the receiver may assume that the corresponding SRS and the PUCCH are QCL with respect to Doppler shift, Doppler spread, average delay, and delay speed Such association may improve the PUCCH detection performance at the receiver. Such association may allow for the receiver to infer the power delay profile of the PUCCH channel from the SRS channel, which may improve the channel estimation performance for PUCCH. For example, in instances where a UE transmits the SRS and the PUCCH from the same antenna port, the receiver may infer the actual channel of the PUCCH from the channel of the SRS. In order for the receiver to infer the channel of the PUCCH from the channel of the SRS, it is helpful for the UE to maintain phase coherence between the SRS and PUCCH. For example, the UE may utilize the same transmission power when transmitting the SRS and PUCCH, the same bandwidth for the SRS and PUCCH, or not having a time-gap between the SRS and PUCCH.

[0069] Aspects presented herein are directed to improving the manner in which a receiver may infer the channel of the PUCCH from the channel of the SRS which allows a transmitter to partially adjust SRS resources associated with an uplink channel (e.g., PUCCH or PUSCH). Aspects presented herein allow for further enhancements for PUCCH detection and thereby improve the reliability of PUCCH detection.

[0070] FIG. 6 is an example diagram 600 of a slot illustrating an SRS resource 602 and an associated PUCCH 606. In some aspects, a transmitter (e.g., a UE) may be configured, triggered, or activated with one or more SRS resources. Each of the one or more SRS resources may include its own bandwidth, power control loops, symbol locations within a slot, time-domain behavior. Each of the one or more SRS resources may span a collection of consecutive symbols. As shown in FIG. 6, the SRS resource 602 may be comprised of multiple SRS symbols (e.g., SRS1, SRS2, SRS3, SRS4). The transmitter or UE may be configured to associate the SRS resource 602 with one or more PUCCH resources (e.g., 606). In some instances, when the SRS resource is configured, triggered, activated in an adjacent symbol of an associated PUCCH resource, the UE may adjust SRS transmission properties on the OFDM symbol that is adjacent to the PUCCH resource. The adjustment of the SRS transmission properties of the symbol may allow the SRS resource and the associated PUCCH resource to have similar characteristics. In some aspects, the SRS transmission properties that may be adjusted include transmit power, total bandwidth, start and/or center of the bandwidth of the SRS, spatial relation information, and/or the number of SRS ports.

[0071] The SRS transmission properties that may be adjusted may be for a subset of the symbols of the occasion of the SRS resource 602. For example, with reference to FIG. 6, the subset 604 of SRS symbols (e.g., SRS4) may be adjusted if the associated PUCCH 606 is in an adjacent symbol. As discussed above, the adjustment of SRS4 may assist in the demodulation and detection of the PUCCH by adjusting, for example, the transmit power of the SRS4 to be the same as the PUCCH. Additionally, adjusting the transmit power and/or other SRS transmission properties to be the same as the PUCCH assists in maintaining the phase coherence between the SRS and the PUCCH. The loss of phase coherence may result in the SRS and PUCCH no longer using the same antenna port. [0072] In some aspects, the bandwidth of the SRS resource (e.g., SRS4 604) may be adjusted to match the bandwidth of the PUCCH 606 to assist in maintaining the phase coherence. The channel of the PUCCH correlates to frequency and time, and the bandwidth of the PUCCH 606 deviating from that of the SRS4 604 may result in the loss of phase coherence such that the PUCCH 606 is transmitted on a different antenna port.

[0073] The UE may be configured to adjust the SRS and assist in the demodulation of the PUCCH, in certain situations, such that the adjusted SRS may assist the PUCCH opportunistically, as opposed to having a dedicated SRS resource adjacent the PUCCH resource and always adjusting the dedicated SRS resource. The UE may adjust SRS transmission properties in instances when the PUCCH is adjacent the SRS. However, if the SRS is not adjacent the associated PUCCH, then the SRS transmission properties will not be adjusted and the SRS will be transmitted based on the original or legacy configuration.

[0074] FIG. 7 is an example diagram 700 of a periodic SRS resource. The periodic SRS resource may comprise a 4-symbol periodic SRS resource (e.g., 702, 704, 706, 08). In the aspect of FIG. 7, the periodic SRS resource may comprise a periodicity that is four times larger than that of the associated PUCCH resource 712.

[0075] When the SRS resource (e.g., 708) and the PUCCH 712 are in adjacent symbols, then the last symbol (e.g., SRS4 710) of the SRS resource may be adjusted. In some aspects, the SRS transmission properties of the last symbol SRS4 710 may be adjusted to match that of the PUCCH 712. For example, the last symbol SRS4 710 may be transmitted with the same bandwidth and/or power as the associated PUCCH 712. This SRS adjustment assists to maintain the phase coherence between the SRS and PUCCH such that the receiver may infer the channel of the PUCCH.

[0076] In the aspect of FIG. 7, the PUCCH 712 is shown as being adjacent the last symbol SRS4 710 of the SRS resource 708. However, the disclosure is not intended to be limited to the aspects disclosed herein. In some aspects, the associated PUCCH may be adjacent other symbols of an SRS resource and is not intended to be limited to being adjacent a last symbol of an SRS resource. For example, as shown in the diagram 800 of FIG. 8, the PUCCH 810 may be adjacent the first symbol SRS1 812 of the SRS resource 808. The first symbol SRS1 812 may be adjusted to have transmission properties similar to the PUCCH 810, as discussed above. Meanwhile, the SRS resources 802, 804, and 806 are not adjusted. [0077] In some aspects, the transmitter or UE may be configured with a number of SRS symbols to be adjusted when the SRS resource is adjacent to the associated PUCCH. For example, as shown in the diagram 900 of FIG. 9, the UE may be configured to adjust the two SRS symbols (e.g., 910, 912, 914, 916) that are adjacent the PUCCH (e.g., 912, 918) of SRS resources 904 and 908, respectively, while the SRS resources 902 and 906 are not adjusted. The two SRS symbols may be adjusted in a manner similarly as discussed above. The aspect of FIG. 9 shows that two SRS symbols may be adjusted. However, the disclosure is not intended to be limited to the aspects provided herein. In some aspects, the UE may be configured to adjust more than two adjacent SRS symbols and is not intended to be limited to two symbols. In some aspects, the UE may be configured to adjust a different amount of SRS symbols that are adjacent the PUCCH.

[0078] In some aspects, if the SRS resource and the associated PUCH collide, as shown in the diagram 1000 of FIG. 10, then the PUCCH may be given priority, such that the SRS symbol(s) that collide with the PUCCH may be dropped. In such an instance, the remaining adjacent SRS symbols may have their transmission properties adjusted, as discussed above. In the aspectof FIG. 10, the SRS resources 1002, 1004, and 1006 are unaffected, while the PUCCH 1012 collides with the second SRS symbol of the SRS resource 1008, such that the second SRS symbol is dropped, while the first SRS symbol SRS1 1010 and the third SRS symbol SRS3 1014 being adjacent to the PUCCH 1012 are adjusted.

[0079] In some aspects, the association may be allowed only if the SRS resource is part of an

SRS resource set with a specific usage. For example, the association may be on the SRS resource set level. In such an instance, if any of the SRS resources of the set are adjacent to the associated PUCCH, then such SRS resources may be adjusted as described above. For example, with reference to the example diagram 1100 of FIG. 11, SRS resources 1102 and 1104 may be part of an SRS resource set with a specific usage. For example, some specific usages for SRS resource sets may include antenna switching, codebook-based, non-codebook based, beam management, or positioning. The PUCCH 1106 may be adjacent to each of the SRS resources 1102 and 1104, such that the symbols of the SRS resources adjacent the PUCCH may be adjusted. In the aspect of FIG. 11, the two adjacent symbols (e.g., SRS3 1108, SRS4 1110, SRS1 1112, SRS2 1114) of the SRS resources 1102, 1104 may be adjusted as discussed herein. In some aspects, a different number of adjacent SRS symbols may be adjusted, and the disclosure is not intended to be limited to the aspects disclosed herein. The SRS ports transmitted in the adjusted symbols may not be the same port (e.g., not phase continuous, not the same power) as the SRS port transmitted in the non-adjusted symbols of the SRS resource.

[0080] In the case of dynamic scheduling, the UE may receive scheduling assignments/grants in every subframe. This may give the network full flexibility in assigning the resources to the UE at the cost of transmission of resource allocation information on PDCCH in every subframe. This may also give the flexibility of varying the resource allocation based on the reported channel conditions. For services such as VoIP, the packet size is small and the inter-arrival time of VoIP packets is constant (i.e., AMR codec provides one packet every 20ms during active period and one silence indicator (SID) at 160ms). The control signaling overhead (PDCCH) may be too much for the E-UTRAN in order to support a large number of VoIP users. So, a solution may include to allocate the resources at once and let the UEuse these resources instead of allocating the resources periodically. For semi-persistent scheduling, a similar aspect may be made where the SRS resource may be associated with a semi-persistent PUSCH configuration. As such, in instances where they are adjacent, then the adjacent SRS symbols may adjust their transmission properties, as discussed herein.

[0081] FIG. 12 is a call flow diagram 1200 of signaling between a UE 1202 and a base station 1204. The base station 1204 may be configured to provide at least one cell. The UE 1202 may be configured to communicate with the base station 1204. For example, in the context of FIG. 1, the base station 1204 may correspond to base station 102/180 and, accordingly, the cell may include a geographic coverage area 110 in which communication coverage is provided and/or small cell 102’ having a coverage area 110’ . Further, a UE 1202 may correspond to at least UE 104. In another example, in the context of FIG. 3, the base station 1204 may correspond to base station 310 and the UE 1202 may correspond to UE 350. Optional aspects are illustrated with a dashed line.

[0082] As illustrated at 1206, the base station 1204 may configure a configuration for the UE 1202. The configuration may comprise at least one SRS resource and an associated PUCCH resource.

[0083] As illustrated at 1208, the base station 1204 may transmit the configuration to the UE 1202. The UE 1202 may receive the configuration from the base station. The configuration having the at least one SRS resource and the associated PUCCH resource.

[0084] As illustrated at 1210, the UE 1202 may determine if the at least one SRS resource is in a symbol adjacent to the associated PUCCH resource.

[0085] As illustrated at 1212, the UE 1202 adjust SRS transmission properties of the at least one SRS resource. The UE 1202 may adjust the SRS transmission properties of the at least one SRS resource upon the determination that the at least one SRS resource and the associated PUCCH resource are in adjacent symbols. In some aspects, the adjusted SRS transmission properties may include at least one of a transmit power, a total bandwidth, a start of the bandwidth of the SRS, a center of the bandwidth of the SRS, a spatial relation information, or a number of SRS ports. In some aspects, the adjusted SRS transmission properties may be adjusted for a subset of symbols of an occasion of the at least one SRS resource. In some aspects, the SRS transmission properties may not be adjusted upon the determination that the at least one SRS resource and the associated PUCCH resource are not in adjacent symbols. In some aspects, the adjusted SRS transmission properties may span one or more adjacent SRS symbols. In some aspects, one or more SRS symbols adjacent the associated PUCCH may be adjusted if the one or more SRS symbols of the at least one SRS resource and the associated PUCCH collide. In some aspects, the at least one SRS resource may be comprised within an SRS resource set. In some aspects, a subset of SRS transmission properties may be adjusted if any of the at least one SRS resource of the SRS resource set is adjacent the associated PUCCH.

[0086] In some aspects, for example as illustrated at 1214, the UE 1202 may transmit the SRS resource. The UE 1202 may transmit the SRS resource to the base station 1204. In some aspects, the UE 1202 may transmit adjusted SRS transmission properties. The UE 1202 may transmit the adjusted SRS transmission properties of the at least one SRS resource on the symbol that is adjacent the PUCCH resource. In some aspects, the symbol of the at least one SRS resource and the associated PUCCH may be transmitted at the same bandwidth and power. In some aspects, the UE 1202 may transmit the at least one SRS resource in accordance with the configuration. For example, the UE 1202 may transmit the at least one SRS resource in accordance with the original configuration received from the base station 1204, such that the at least one SRS resource has not been adjusted. In some aspects, the UE 1202 may transmit the at least one SRS resource in accordance with the original configuration receive from the base station 1204 due to the UE 1202 determining that the at least one SRS resource and the associated PUCCH resource are not in adjacent symbols. The base station 1204 receives the at least one SRS resource. The base station 1204 may receive the at least one SRS resource having adjusted SRS transmission properties or may receive the at least one SRS resource based on the original configuration provided by the base station 1204.

[0087] FIG. 13 is a flowchart 1300 of a method of wireless communication. The method may be performed by a UE or a component of a UE (e.g., the UE 104, 1202; the apparatus 1402; the cellular baseband processor 1404, which may include the memory 360 and which may be the entire UE 350 or a component of the UE 350, such as the TX processor 368, the RX processor 356, and/or the controller/processor 359). One or more of the illustrated operations may be omitted, transposed, or contemporaneous. Optional aspects are illustrated with a dashed line. The method may enable a UE to adjust SRS transmission properties when at least one SRS resource is in an adjacent symbol of an associated PUCCH resource.

[0088] At 1302, the UE may receive a configuration. For example, 1302 may be performed by configuration component 1440 of apparatus 1402. The configuration may have at least one SRS resource and an associated PUCCH resource. The UE may receive the configuration from a base station.

[0089] At 1304, the UE may determine if the at least one SRS resource is in a symbol adjacent to the associated PUCCH resource. For example, 1304 may be performed by determination component 1442 of apparatus 1402.

[0090] At 1306, the UE may adjust SRS transmission properties of the at least one SRS resource. For example, 1306 may be performed by adjust component 1444 of apparatus 1402. The UE may adjust the SRS transmission properties of the at least one SRS resource upon the determination that the at least one SRS resource and the associated PUCCH resource are in adjacent symbols. In some aspects, the adjusted SRS transmission properties may include at least one of a transmit power, a total bandwidth, a start of the bandwidth of the SRS, a center of the bandwidth of the SRS, a spatial relation information, or a number of SRS ports. In some aspects, the adjusted SRS transmission properties may be adjusted for a subset of symbols of an occasion of the at least one SRS resource. In some aspects, the SRS transmission properties may not be adjusted upon the determination that the at least one SRS resource and the associated PUCCH resource are not in adjacent symbols. In some aspects, the adjusted SRS transmission properties may span one or more adjacent SRS symbols. In some aspects, one or more SRS symbols adjacent the associated PUCCH may be adjusted if the one or more SRS symbols of the at least one SRS resource and the associated PUCCH collide. In some aspects, the at least one SRS resource may be comprised within an SRS resource set. In some aspects, a subset of SRS transmission properties may be adjusted if any of the at least one SRS resource of the SRS resource set is adjacent the associated PUCCH.

[0091] In some aspects, for example at 1308, the UE may transmit the adjusted SRS transmission properties. For example, 1308 may be performed by SRS component 1446 of apparatus 1402. The UE may transmit the adjusted SRS transmission properties of the at least one SRS resource on the symbol that is adjacent the PUCCH resource. In some aspects, the symbol of the at least one SRS resource and the associated PUCCH may be transmitted at the same bandwidth and power.

[0092] In some aspects, for example at 1310, the UE may transmit the at least one SRS resource in accordance with the configuration. For example, 1310 may be performed by SRS component 1446 of apparatus 1402. For example, the UE may transmit the at least one SRS resource in accordance with the original configuration received from the base station, such that the at least one SRS resource has not been adjusted. In some aspects, the UE may transmit the at least one SRS resource in accordance with the original configuration receive from the base station due to the UE determining that the at least one SRS resource and the associated PUCCH resource are not in adjacent symbols.

[0093] FIG. 14 is a diagram 1400 illustrating an example of a hardware implementation for an apparatus 1402. The apparatus 1402 is a UE and includes a cellular baseband processor 1404 (also referred to as a modem) coupled to a cellular RF transceiver 1422 and one or more subscriber identity modules (SIM) cards 1420, an application processor 1406 coupled to a secure digital (SD) card 1408 and a screen 1410, a Bluetooth module 1412, a wireless local area network (WLAN) module 1414, a Global Positioning System (GPS) module 1416, and a power supply 1418. The cellular baseband processor 1404 communicates through the cellular RF transceiver 1422 with the UE 104 and/or BS 102/180. The cellular baseband processor 1404 may include a computer-readable medium / memory. The computer-readable medium / memory may be non-transitory. The cellular baseband processor 1404 is responsible for general processing, including the execution of software stored on the computer- readable medium / memory. The software, when executed by the cellular baseband processor 1404, causes the cellular baseband processor 1404 to perform the various functions described supra. The computer-readable medium / memory may also be used for storing data that is manipulated by the cellular baseband processor 1404 when executing software. The cellular baseband processor 1404 further includes a reception component 1430, a communication manager 1432, and a transmission component 1434. The communication manager 1432 includes the one or more illustrated components. The components within the communication manager 1432 may be stored in the computer-readable medium / memory and/or configured as hardware within the cellular baseband processor 1404. The cellular baseband processor 1404 may be a component of the UE 350 and may include the memory 360 and/or at least one of the TX processor 368, the RX processor 356, and the controller/processor 359. In one configuration, the apparatus 1402 may be a modem chip and include just the cellular baseband processor 1404, and in another configuration, the apparatus 1402 may be the entire UE (e.g., see 350 of FIG. 3) and include the aforediscussed additional modules of the apparatus 1402.

[0094] The communication manager 1432 includes a configuration component 1440 that is configured to receive a configuration, e.g., as described in connection with 1302 of FIG. 13. The communication manager 1432 further includes a determination component 1442 that is configured to determine if the at least one SRS resource is in a symbol adjacent to the associated PUCCH resource, e.g., as described in connection with 1304 of FIG. 13. The communication manager 1432 further includes an adjust component 1444 is configured to adjust SRS transmission properties of the at least one SRS resource, e.g., as described in connection with 1306 of FIG. 13. The communication manager 1432 further includes an SRS component 1446 that is configured to transmit the adjusted SRS transmission properties, e.g., as described in connection with 1308 of FIG. 13. The SRS component 1446 may be configured to may transmit the at least one SRS resource in accordance with the configuration, e.g., as described in connection with 1310 of FIG. 13.

[0095] The apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowchart of FIG. 13. As such, each block in the aforementioned flowchart of FIG. 13 may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.

[0096] In one configuration, the apparatus 1402, and in particular the cellular baseband processor 1404, includes means for receiving, from a base station, a configuration having at least one SRS resource and an associated PUCCH resource. The apparatus includes means for determining if the at least one SRS resource is in a symbol adjacent to the associated PUCCH resource. The apparatus includes means for adjusting SRS transmission properties of the at least one SRS resource upon the determination that the at least one SRS resource and the associated PUCCH resource are in adjacent symbols. The apparatus further includes means for transmitting the adjusted SRS transmission properties of the at least one SRS resource on the symbol that is adjacent the PUCCH resource. The apparatus further includes means for transmitting the at least one SRS resource in accordance with the configuration. The aforementioned means may be one or more of the aforementioned components of the apparatus 1402 configured to perform the functions recited by the aforementioned means. As described supra , the apparatus 1402 may include the TX Processor 368, the RX Processor 356, and the controller/processor 359. As such, in one configuration, the aforementioned means may be the TX Processor 368, the RX Processor 356, and the controller/processor 359 configured to perform the functions recited by the aforementioned means.

[0097] FIG. 15 is a flowchart 1500 of a method of wireless communication. The method may be performed by a base station or a component of abase station (e.g., the base station 102/180, 1204; the apparatus 1602; the baseband unit 1604, which may include the memory 376 and which may be the entire base station 310 or a component of the base station 310, such as the TX processor 316, the RX processor 370, and/or the controller/processor 375). One or more of the illustrated operations may be omitted, transposed, or contemporaneous. Optional aspects are illustrated with a dashed line. The method may allow a base station to transmit a configuration to a UE, such that the UE may determine to adjust SRS transmission properties of at least one SRS resource within the configuration.

[0098] At 1502, the base station may configure a configuration for aUE. For example, 1502 may be performed by configuration component 1640 of apparatus 1602. The configuration may comprise at least one SRS resource and an associated PUCCH resource.

[0099] At 1504, the base station may transmit the configuration. For example, 1504 may be performed by transmission component 1634 of apparatus 1602. The base station may transmit the configuration to the UE.

[00100] At 1506, the base station may receive at least one SRS and an associated PUCCH based at least on the configuration. For example, 1506 may be performed by reception component 1630 of apparatus 1602. The base station may receive the at least one SRS and the associated PUCCH from the UE. In some aspects, receiving the at least one SRS and the associated PUCCH may comprise receiving the at least one SRS based on adjusted SRS transmission properties. The SRS transmission properties may be adjusted, by the UE, if the at least one SRS resource and the associated PUCCH resource are in adjacent symbols. In some aspects, the adjusted SRS transmission properties may be adjusted for a subset of symbols of an occasion of the at least one SRS resource. In some aspects, the adjusted SRS transmission properties may include at least one of a transmit power, a total bandwidth, a start of the bandwidth of the SRS, a center of the bandwidth of the SRS, a spatial relation information, or a number of SRS ports. In some aspects, the symbol of the at least one SRS resource and the associated PUCCH maybe transmitted, by the UE, at the same bandwidth and power. In some aspects, the adjusted SRS transmission properties may be adjusted for a subset of symbols of an occasion of the at least one SRS resource. In some aspects, the adjusted SRS transmission properties may span one or more adjusted SRS symbols. In some aspects, the one or more SRS symbols adjacent the associated

PUCCH may be adjusted if the one or more SRS symbols of the at least one SRS resource and the associated PUCCH collide. In some aspects, the at least one SRS resource may be comprised within an SRS resource set. A subset of SRS transmission properties may be adjusted if any of the at least one SRS resource of the SRS resource set is adjacent the associated PUCCH. In some aspects, the SRS transmission properties of the at least one SRS may not be adjusted if the at least one SRS resource and the associated PUCCH resource are not in adjacent symbols.

[00101] FIG. 16 is a diagram 1600 illustrating an example of a hardware implementation for an apparatus 1602. The apparatus 1602 is a BS and includes a baseband unit 1604. The baseband unit 1604 may communicate through a cellular RF transceiver 1622 with the UE 104. The baseband unit 1604 may include a computer-readable medium / memory. The baseband unit 1604 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the baseband unit 1604, causes the baseband unit 1604 to perform the various functions described supra. The computer-readable medium / memory may also be used for storing data that is manipulated by the baseband unit 1604 when executing software. The baseband unit 1604 further includes a reception component 1630, a communication manager 1632, and a transmission component 1634. The communication manager 1632 includes the one or more illustrated components. The components within the communication manager 1632 may be stored in the computer-readable medium / memory and/or configured as hardware within the baseband unit 1604. The baseband unit 1604 may be a component of the BS 310 and may include the memory 376 and/or at least one of the TX processor 316, the RX processor 370, and the controller/processor 375.

[00102] The communication manager 1632 includes a configuration component 1640 that may configure a configuration for aUE, e.g., as described in connection with 1502 of FIG. 15. The transmission component 1634 may be configured to transmit the configuration, e.g., as described in connection with 1504 of FIG. 15. The reception component 1630 may be configured to receive at least one SRS and an associated PUCCHbased at least on the configuration, e.g., as described in connection with 1506 of FIG. 15.

[00103] The apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowchart of FIG. 15. As such, each block in the aforementioned flowchart of FIG. 15 may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.

[00104] In one configuration, the apparatus 1602, and in particular the baseband unit 1604, includes means for configuring a configuration having at least one SRS resource and an associated PUCCH resource. The apparatus includes means for transmitting the configuration to a UE. The apparatus includes means for receiving, from the UE, at least one SRS and an associated PUCCH based at least on the configuration. The aforementioned means may be one or more of the aforementioned components of the apparatus 1602 configured to perform the functions recited by the aforementioned means. As described supra, the apparatus 1602 may include the TX Processor 316, the RX Processor 370, and the controller/processor 375. As such, in one configuration, the aforementioned means may be the TX Processor 316, the RX Processor 370, and the controller/processor 375 configured to perform the functions recited by the aforementioned means.

[00105] It is understood that the specific order or hierarchy of blocks in the processes / flowcharts disclosed is an illustration of example approaches. Based upon design preferences, it is understood that the specific order or hierarchy of blocks in the processes / flowcharts may be rearranged. Further, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not meant to be limited to the specific order or hierarchy presented.

[00106] The following examples are illustrative only and may be combined with aspects of other embodiments or teachings described herein, without limitation.

[00107] Aspect 1 is a method of wireless communication at a UE comprising receiving, from a base station, a configuration having at least one SRS resource and an associated PUCCH resource; determining if the at least one SRS resource is in a symbol adjacent to the associated PUCCH resource; and adjusting SRS transmission properties of the at least one SRS resource upon the determination that the at least one SRS resource and the associated PUCCH resource are in adjacent symbols.

[00108] In Aspect 2, the method of Aspect 1 further includes that the adjusted SRS transmission properties include at least one of a transmit power, a total bandwidth, a start of the bandwidth of the SRS, a center of the bandwidth of the SRS, a spatial relation information, or a number of SRS ports.

[00109] In Aspect 3, the method of Aspect 1 or 2 further includes that the adjusted SRS transmission properties are adjusted for a subset of symbols of an occasion of the at least one SRS resource.

[00110] In Aspect 4, the method of any of Aspects 1-3 further includes transmitting the adjusted SRS transmission properties of the at least one SRS resource on the symbol that is adjacent the PUCCH resource.

[00111] In Aspect 5, the method of any of Aspects 1-4 further includes that the symbol of the at least one SRS resource and the associated PUCCH are transmitted at a same bandwidth and power. [00112] In Aspect 6, the method of any of Aspects 1-5 further includes that the SRS transmission properties are not adjusted upon the determination that the at least one SRS resource and the associated PUCCH resource are not in adjacent symbols.

[00113] In Aspect 7, the method of any of Aspects 1-6 further includes transmitting the at least one SRS resource in accordance with the configuration.

[00114] In Aspect 8, the method of any of Aspects 1-7 further includes that the adjusted SRS transmission properties spans one or more adjacent SRS symbols.

[00115] In Aspect 9, the method of any of Aspects 1-8 further includes that one or more SRS symbols adjacent the associated PUCCH are adjusted if the one or more SRS symbols of the at least one SRS resource and the associated PUCCH collide.

[00116] In Aspect 10, the method of any of Aspects 1-9 further includes that the at least one SRS resource is comprised within an SRS resource set, wherein a subset of SRS transmission properties may be adjusted if any of the at least one SRS resource of the SRS resource set is adjacent the associated PUCCH.

[00117] Aspect 11 is a device including one or more processors and one or more memories in electronic communication with the one or more processors storing instructions executable by the one or more processors to cause the system or apparatus to implement a method as in any of Aspects 1-10.

[00118] Aspect 12 is a system or apparatus including means for implementing a method or realizing an apparatus as in any of Aspects 1-10.

[00119] Aspect 13 is a non-transitory computer readable medium storing instructions executable by one or more processors to cause the one or more processors to implement a method as in any of Aspects 1-10.

[00120] Aspect 14 is a method of wireless communication at a base station comprising configuring a configuration having at least one SRS resource and an associated PUCCH resource; transmitting the configuration to a UE; and receiving, from the UE, at least one SRS and an associated PUCCH based at least on the configuration.

[00121] In Aspect 15, the method of Aspect 14 further includes that receiving the at least one SRS and the associated PUCCH comprises receiving the at least one SRS based on adjusted SRS transmission properties if the at least one SRS resource and the associated PUCCH resource are in adjacent symbols.

[00122] In Aspect 16, the method of Aspect 14 or 15 further includes that the adjusted SRS transmission properties are adjusted for a subset of symbols of an occasion of the at least one SRS resource. [00123] In Aspect 17, the method of any of Aspects 14-16 further includes that the adjusted SRS transmission properties include at least one of a transmit power, a total bandwidth, a start of the bandwidth of the SRS, a center of the bandwidth of the SRS, a spatial relation information, or a number of SRS ports.

[00124] In Aspect 18, the method of any of Aspects 14-17 further includes that the symbol of the at least one SRS resource and the associated PUCCH are transmitted, by the UE, at a same bandwidth and power.

[00125] In Aspect 19, the method of any of Aspects 14-18 further includes that the adjusted SRS transmission properties are adjusted for a subset of symbols of an occasion of the at least one SRS resource, wherein the adjusted SRS transmission properties spans one or more adjacent SRS symbols.

[00126] In Aspect 20, the method of any of Aspects 14-19 further includes that one or more SRS symbols adjacent the associated PUCCH are adjusted if the one or more SRS symbols of the at least one SRS resource and the associated PUCCH collide.

[00127] In Aspect 21, the method of any of Aspects 14-20 further includes that the at least one SRS resource is comprised within an SRS resource set, wherein a subset of SRS transmission properties may be adjusted if any of the at least one SRS resource of the SRS resource set is adjacent the associated PUCCH.

[00128] In Aspect 22, the method of any of Aspects 14-21 further includes that SRS transmission properties of the at least one SRS are not adjusted if the at least one SRS resource and the associated PUCCH resource are not in adjacent symbols.

[00129] Aspect 23 is a device including one or more processors and one or more memories in electronic communication with the one or more processors storing instructions executable by the one or more processors to cause the system or apparatus to implement a method as in any of Aspects 14-22.

[00130] Aspect 24 is a system or apparatus including means for implementing a method or realizing an apparatus as in any of Aspects 14-22.

[00131] Aspect 25 is a non-transitory computer readable medium storing instructions executable by one or more processors to cause the one or more processors to implement a method as in any of Aspects 14-22.

[00132] The previous 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 readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more.” Terms such as “if,” “when,” and “while” should be interpreted to mean “under the condition that” rather than imply an immediate temporal relationship or reaction. That is, these phrases, e.g., “when,” do not imply an immediate action in response to or during the occurrence of an action, but simply imply that if a condition is met then an action will occur, but without requiring a specific or immediate time constraint for the action to occur. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term “some” refers to one or more. Combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof’ include any combination of A, B, and/or C, and may include multiples of A, multiples of B, or multiples of 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 A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module,” “mechanism,” “element,” “device,” and the like may not be a substitute for the word “means.” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for.”

Claims

CLAIMS WHAT IS CLAIMED IS:

1. A method of wireless communication at a user equipment (UE), comprising: receiving, from a base station, a configuration having at least one SRS resource and an associated physical uplink control channel (PUCCH) resource; determining if the at least one SRS resource is in a symbol adjacent to the associated PUCCH resource; and adjusting SRS transmission properties of the at least one SRS resource upon the determination that the at least one SRS resource and the associated PUCCH resource are in adjacent symbols.

2. The method of claim 1, wherein the adjusted SRS transmission properties include at least one of a transmit power, a total bandwidth, a start of the bandwidth of the SRS, a center of the bandwidth of the SRS, a spatial relation information, or a number of SRS ports.

3. The method of claim 2, wherein the adjusted SRS transmission properties are adjusted for a subset of symbols of an occasion of the at least one SRS resource.

4. The method of claim 1, further comprising: transmitting the adjusted SRS transmission properties of the at least one SRS resource on the symbol that is adjacent the PUCCH resource.

5. The method of claim 4, wherein the symbol of the at least one SRS resource and the associated PUCCH are transmitted at a same bandwidth and power.

6. The method of claim 1, wherein the SRS transmission properties are not adjusted upon the determination that the at least one SRS resource and the associated PUCCH resource are not in adjacent symbols.

7. The method of claim 6, further comprising: transmitting the at least one SRS resource in accordance with the configuration.

8. The method of claim 1, wherein the adjusted SRS transmission properties spans one or more adjacent SRS symbols.

9. The method of claim 1, wherein one or more SRS symbols adjacent the associated PUCCH are adjusted if the one or more SRS symbols of the at least one SRS resource and the associated PUCCH collide.

10. The method of claim 1, wherein the at least one SRS resource is comprised within an SRS resource set, wherein a subset of SRS transmission properties may be adjusted if any of the at least one SRS resource of the SRS resource set is adjacent the associated PUCCH.

11. An apparatus for wireless communication at a user equipment (UE), comprising: a memory; and at least one processor coupled to the memory and configured to: receive, from a base station, a configuration having at least one SRS resource and an associated PUCCH resource; determine if the at least one SRS resource is in a symbol adjacent to the associated PUCCH resource; and adjust SRS transmission properties of the at least one SRS resource upon the determination that the at least one SRS resource and the associated PUCCH resource are in adjacent symbols.

12. The apparatus of claim 11, wherein the adjusted SRS transmission properties include at least one of a transmit power, a total bandwidth, a start of the bandwidth of the SRS, a center of the bandwidth of the SRS, a spatial relation information, or a number of SRS ports.

13. The apparatus of claim 12, wherein the adjusted SRS transmission properties are adjusted for a subset of symbols of an occasion of the at least one SRS resource.

14. The apparatus of claim 11, wherein the at least one processor is configured to: transmit the adjusted SRS transmission properties of the at least one SRS resource on the symbol that is adjacent the PUCCH resource.

15. The apparatus of claim 14, wherein the symbol of the at least one SRS resource and the associated PUCCH are transmitted at a same bandwidth and power.

16. The apparatus of claim 11, wherein the SRS transmission properties are not adjusted upon the determination that the at least one SRS resource and the associated PUCCH resource are not in adjacent symbols.

17. The apparatus of claim 16, wherein the at least one processor is configured to: transmit the at least one SRS resource in accordance with the configuration.

18. The apparatus of claim 11, wherein the adjusted SRS transmission properties spans one or more adjacent SRS symbols.

19. The apparatus of claim 11, wherein one or more SRS symbols adjacent the associated PUCCH are adjusted if the one or more SRS symbols of the at least one SRS resource and the associated PUCCH collide.

20. The apparatus of claim 11, wherein the at least one SRS resource is comprised within an SRS resource set, wherein a subset of SRS transmission properties may be adjusted if any of the at least one SRS resource of the SRS resource set is adjacent the associated PUCCH.

21. A method of wireless communication at a base station, comprising: configuring a configuration having at least one SRS resource and an associated PUCCH resource; transmitting the configuration to a user equipment (UE); and receiving, from the UE, at least one SRS and an associated PUCCH based at least on the configuration.

22. The method of claim 21, wherein receiving the at least one SRS and the associated PUCCH comprises receiving the at least one SRS based on adjusted SRS transmission properties if the at least one SRS resource and the associated PUCCH resource are in adjacent symbols.

23. The method of claim 22, wherein the adjusted SRS transmission properties are adjusted for a subset of symbols of an occasion of the at least one SRS resource.

24. The method of claim 22, wherein the adjusted SRS transmission properties include at least one of a transmit power, a total bandwidth, a start of the bandwidth of the SRS, a center of the bandwidth of the SRS, a spatial relation information, or a number of SRS ports.

25. The method of claim 22, wherein the symbol of the at least one SRS resource and the associated PUCCH are transmitted, by the UE, at a same bandwidth and power.

26. The method of claim 22, wherein the adjusted SRS transmission properties are adjusted for a subset of symbols of an occasion of the at least one SRS resource, wherein the adjusted SRS transmission properties spans one or more adjacent SRS symbols.

27. The method of claim 22, wherein one or more SRS symbols adjacent the associated PUCCH are adjusted if the one or more SRS symbols of the at least one SRS resource and the associated PUCCH collide.

28. The method of claim 22, wherein the at least one SRS resource is comprised within an SRS resource set, wherein a subset of SRS transmission properties may be adjusted if any of the at least one SRS resource of the SRS resource set is adjacent the associated PUCCH.

29. The method of claim 21, wherein SRS transmission properties of the at least one SRS are not adjusted if the at least one SRS resource and the associated PUCCH resource are not in adjacent symbols.

30. An apparatus for wireless communication at a base station, comprising: a memory; and at least one processor coupled to the memory and configured to: configure a configuration having at least one SRS resource and an associated PUCCH resource; transmit the configuration to a user equipment (UE); and receive, from the UE, at least one SRS and an associated PUCCH based at least on the configuration.