Method and wireless communication device for wireless communication

Abstract

Wireless communications systems and methods related to signaling a direct current (DC) location of a user equipment device (UE) in a new radio (NR) network are provided. A wireless communications device receives at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration from a base station. The wireless communications device determines a direct current (DC) location based on the at least one of the CA configuration or the BWP configuration. The wireless communications device transmits a report based on the determined DC location to the base station. The wireless communications device communicates a phase tracking reference signal (PTRS) configured based on the report to the base station.

Description

[0001] This Patent Application is a Continuation of International Application No. PCT / US2019 / 026568, International Filing Date April 9, 2019, entitled “Uplink Signaling of Direct Current (DC) Tone Location in New Radio (NR),” assigned to the assignee hereof, and claims priority to U.S. Non-Provisional Patent Application No. 16 / 378,401, filed April 8, 2019, and U.S. Provisional Patent Application No. 62 / 680,225, filed June 4, 2018, U.S. Provisional Patent Application No. 62 / 660,164, filed April 19, 2018, and U.S. Provisional Patent Application No. 62 / 655,797, filed April 10, 2018, each of which is herein incorporated by reference in its entirety and for all purposes.

[0002] Cross Reference to Related Applications

[0003] This application claims priority to and the benefit of U.S. Non-Provisional Patent Application No. 16 / 378,401, filed April 8, 2019, and U.S. Provisional Patent Application No. 62 / 680,225, filed June 4, 2018, U.S. Provisional Patent Application No. 62 / 660,164, filed April 19, 2018, and U.S. Provisional Patent Application No. 62 / 655,797, filed April 10, 2018, each of which is herein incorporated by reference in its entirety and for all purposes. TECHNICAL FIELD

[0004] The present application relates to wireless communication systems, and more particularly to signaling a direct current (DC) location of a user equipment device (UE) in a new radio (NR) network. Certain embodiments can implement and provide solutions and techniques for a UE to efficiently report a DC location to improve reference signal (e.g., phase tracking reference signal (PTRS)) communication. The present application relates to uplink signaling of direct current (DC) tone location in new radio (NR). BACKGROUND

[0005] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems can be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). A wireless multiple-access communication system can include a number of base stations (BSs), each simultaneously supporting communications for multiple communication devices, which can be otherwise known as user equipment (UE).

[0006] Wireless communications technology is advancing from LTE technology to a next generation, new radio (NR), to meet increasing demands for expanded mobile broadband connectivity. NR, for example, is designed to provide lower latency, higher bandwidth or throughput, and more reliable communications than LTE. NR is designed to operate over a wide range of spectrum bands, such as sub-gigahertz (GHz) low frequency bands, mid-gigahertz (GHz) bands, and high frequency bands such as millimeter wave (mmWave) frequency bands. Additionally, NR is designed to operate across different spectrum types from licensed spectrum to unlicensed and shared spectrum.

[0007] Although using higher frequencies (e.g., above 6 GHz) can provide greater transmission capacity, phase noise levels can increase with higher frequencies. Phase noise can impact the performance of certain wireless communications systems. Accordingly, a transmitter can transmit reference signals, such as phase tracking reference signals (PTRSs), to facilitate phase noise estimation and correction at a receiver.

[0008] However, depending on the location of reference signals within a radio frequency (RF) resource, a receiver can not be able to efficiently receive the reference signals due to interference with tones within the resource. For example, a direct current (DC) frequency tone can have a large negative impact on the performance of a baseband receiver. The DC frequency tone can result in high interference and / or high noise to signal processing and / or poor error vector magnitude (EVM) at the receiver. Some receivers can apply DC rejection filtering or puncturing to discard tones affected by DC. As such, to enable a receiver to efficiently receive reference signals, a transmitter can avoid transmitting reference signals using frequency resources that overlap with a DC tone location of the receiver.

[0009] In certain wireless communications devices or user equipment devices (UEs), a DC frequency location can depend on an implementation of a receiver. For example, in an NR network, a BS can configure a UE for communications in various bandwidth parts (BWPs) within various component carriers (CCs). Different UEs can have different radio frequency (RF) receiver implementations. For example, some UEs can use a single RF and / or baseband chain for all CCs and / or all BWPs, while other UEs can use different RF and / or baseband chains for different CCs and / or different BWPs. As such, depending on the RF front-end configuration in use, the DC tone location can vary between different UEs and within the same UE. Accordingly, a network can determine a reference signal configuration according to a DC tone location of a UE. SUMMARY

[0010] The following presents a simplified summary of some aspects of the present disclosure to provide a basic understanding of the discussed technology. This summary is not an extensive overview of all contemplated aspects of the present disclosure, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects of the present disclosure. Its sole purpose is to present some concepts of one or more aspects of the present disclosure in a simplified form as a prelude to the more detailed description that is presented later.

[0011] Embodiments of the present disclosure provide mechanisms for efficient reporting of direct current (DC) locations. For example, a user equipment (UE) can report DC location information related to a receiver of the UE and / or a transmitter of the UE based on certain events, such as a carrier aggregation (CA) reconfiguration command, a bandwidth part (BWP) switch command, and / or a BWP reconfiguration command received from a base station (BS). The UE can report a DC location per BWP and per component carrier (CC). The BS can configure the UE with a set of reference BWPs for DC location reporting to reduce the amount of DC location information. The BS can configure the UE with resource mapping for UL and / or DL reference signal (e.g., PTRS) communication based on the DC location reporting. Alternatively, the UE can request the BS to use a particular resource mapping for reference signal (e.g., PTRS) communication based on the transmitter and / or receiver DC location of the UE.

[0012] For example, in an aspect of the disclosure, a method of wireless communication is provided that includes receiving, by a wireless communication device, at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration from a base station. The method also includes determining, by the wireless communication device, a direct current (DC) location based on the at least one of the CA configuration or the BWP configuration. The method further includes transmitting, by the wireless communication device, a report based on the determined DC location to the base station.

[0013] In an additional aspect of the disclosure, a method of wireless communication is provided that includes transmitting, by a base station, at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration to a wireless communication device. The method also includes receiving, by the base station from the wireless communication device, a report indicating direct current (DC) location information associated with the wireless communication device in response to the at least one of the CA configuration or the BWP configuration.

[0014] In an additional aspect of the disclosure, an apparatus is provided that includes a processor configured to determine a direct current (DC) location based on at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration. The apparatus also includes a transceiver configured to receive the at least one of the CA configuration or the BWP configuration from a base station. The transceiver is further configured to transmit a report based on the determined DC location to the base station.

[0015] In an additional aspect of the disclosure, an apparatus includes a transceiver configured to transmit, to a wireless communication device, at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration. The transceiver is also configured to receive, from the wireless communication device, a report indicating direct current (DC) location information associated with the wireless communication device in response to the at least one of the CA configuration or the BWP configuration.

[0016] In an additional aspect of the disclosure, a computer-readable medium having program code recorded thereon is provided. The program code includes code for causing a wireless communication device to receive, from a base station, at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration. The program code also includes code for causing the wireless communication device to determine a direct current (DC) location based on the at least one of the CA configuration or the BWP configuration. The program code also includes code for causing the wireless communication device to transmit, to the base station, a report based on the determined DC location.

[0017] In an additional aspect of the disclosure, a computer-readable medium having program code recorded thereon is provided. The program code includes code for causing a base station to transmit, to a wireless communication device, at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration. The program code also includes code for causing the base station to receive, from the wireless communication device, a report indicating direct current (DC) location information associated with the wireless communication device in response to the at least one of the CA configuration or the BWP configuration.

[0018] In an additional aspect of the disclosure, an apparatus includes means for receiving, from a base station, at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration. The apparatus also includes means for determining a direct current (DC) location based on the at least one of the CA configuration or the BWP configuration. The apparatus also includes means for transmitting, to the base station, a report based on the determined DC location.

[0019] In an additional aspect of the disclosure, an apparatus includes means for transmitting, to a wireless communication device, at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration. The apparatus also includes means for receiving, from the wireless communication device, a report indicating direct current (DC) location information associated with the wireless communication device in response to the at least one of the CA configuration or the BWP configuration.

[0020] Other aspects, features, and embodiments of the application will become apparent to those of ordinary skill in the art, upon reviewing the following description of specific, exemplary embodiments of the application in conjunction with the accompanying figures. While features of the present application can be discussed relative to certain embodiments and figures below, all embodiments of the application can include one or more of the advantageous features discussed herein. In other words, while one or more embodiments can be discussed as having certain advantageous features, one or more of such features can also be used in accordance with the various embodiments of the application discussed herein. In similar fashion, while exemplary embodiments can be discussed herein as devices, systems, or methods, it should be understood that such exemplary embodiments can be implemented in various devices, systems, and methods. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A wireless communication network is illustrated in accordance with some embodiments of the present disclosure.

[0022] Figure 2 An example scenario with user equipment devices (UEs) having different direct current (DC) locations is illustrated in accordance with some embodiments of the present disclosure.

[0023] Figure 3 An example bandwidth part (BWP) configuration is illustrated in accordance with some embodiments of the present disclosure.

[0024] Figure 4 An example BWP configuration is illustrated in accordance with some embodiments of the present disclosure.

[0025] Figure 5 is a block diagram of an exemplary user equipment (UE) in accordance with some embodiments of the present disclosure.

[0026] Figure 6 is a block diagram of an exemplary base station (BS) in accordance with some embodiments of the present disclosure.

[0027] Figure 7 is a signaling diagram illustrating a DC location reporting method in accordance with some embodiments of the present disclosure.

[0028] Figure 8 is a signaling diagram illustrating a DC location reporting method in accordance with some embodiments of the present disclosure.

[0029] Figure 9 is a signaling diagram illustrating a DC location reporting method in accordance with some embodiments of the present disclosure.

[0030] Figure 10 A DC location reporting method is illustrated in accordance with some embodiments of the present disclosure.

[0031] Figure 11DC position reporting message elements are illustrated in accordance with some embodiments of the present disclosure.

[0032] Figure 12 Phase tracking reference signal (PTRS) resource element level (RE level) offset configurations are illustrated in accordance with some embodiments of the present disclosure.

[0033] Figure 13 DC position reporting message elements are illustrated in accordance with some embodiments of the present disclosure.

[0034] Figure 14 is a flowchart of a DC position reporting and PTRS communication method in accordance with embodiments of the present disclosure.

[0035] Figure 15 is a flowchart of a PTRS communication method in accordance with some embodiments of the present disclosure. DETAILED DESCRIPTION

[0036] The detailed description set forth below, in connection with the appended drawings and embodiments described herinin, is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein can be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts can be practiced without

[0037] The present disclosure relates generally to wireless communication systems, also referred to as wireless communications networks. In various embodiments, the techniques and apparatuses (devices) can be used for wireless communication networks such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single-carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, 5thGeneration (5G) or new radio (NR) networks, as well as other communications networks. As described herein, the terms “networks” and “systems” can be used interchangeably.

[0038] An OFDMA network can implement a radio technology such as evolved UTRA (E- UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM, etc. UTRA, E-UTRA, and Global System for Mobile Communications (GSM) are part of universal mobile telecommunication system (UMTS). In particular, long term evolution (LTE) is a release of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents from the organization named “3rd Generation Partnership Project” (3GPP) and cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2). These various radio technologies and standards are known or are being developed. For example, the 3rd Generation Partnership Project (3GPP) is a collaboration between groups of telecommunications associations that aims to define a globally applicable third generation (3G) mobile phone specification. 3GPP long term evolution (LTE) is a 3GPP project that aims to improve the universal mobile telecommunications system (UMTS) mobile phone standard. The 3 GPP can define specifications for the next generation of mobile networks, mobile systems, and mobile devices. The present disclosure concerns the evolution of wireless technologies from LTE, 4G, 5G, NR, and beyond, with shared access to wireless spectrum between using new and different radio access technologies or radio air interfaces.

[0039] In particular, 5G networks contemplate diverse deployments, diverse spectrum, and diverse services and devices that can be implemented using an OFDM-based unified air interface. In order to facilitate these goals, further enhancements to LTE and LTE-A are considered in addition to development of a new radio technology for 5G NR networks. 5G NR will be capable of scaling to meet the requirements of at least 2 2

[0040] ​​5G NR can achieve: optimized OFDM-based waveforms with scalable parameter sets and transmission time periods (TTIs); a shared, flexible framework for efficiently multiplexing services and features using dynamic, low-latency Time Division Duplex (TDD) / Frequency Division Duplex (FDD) designs; and advanced wireless technologies such as massive MIMO, robust millimeter-wave (mmWave) transmission, advanced channel coding, and device-centric mobility. The scalability of the parameter set in 5G NR (and the scaling of subcarrier spacing) can efficiently address the operation of diverse services across diverse spectrum and deployments. For example, in various outdoor and macro coverage deployments implemented with FDD / TDD below 3 GHz, subcarrier spacing can occur at 15 kHz, such as on BWs of 1, 5, 10, and 20 MHz. For other various outdoor and small-cell coverage deployments with TDD above 3 GHz, subcarrier spacing can occur at 30 kHz on an 80 / 100 MHz BW. For various other indoor broadband implementations, by using TDD in the unlicensed portion of the 5 GHz band, the subcarrier spacing can occur at 60 kHz over a 160 MHz BW. Finally, for various deployments using mmWave components for TDD at 28 GHz, the subcarrier spacing can occur at 120 kHz over a 500 MHz BW.

[0041] 5G NR's scalable parameter set facilitates scalable Time Intervals (TTIs) to meet diverse latency and Quality of Service (QoS) requirements. For example, shorter TTIs can be used for low latency and high reliability, while longer TTIs can be used for higher spectral efficiency. Efficient multiplexing of long and short TTIs allows transmissions to begin at symbol boundaries. 5G NR also envisions self-contained integrated subframe designs that incorporate uplink / downlink scheduling information, data, and acknowledgments within the same subframe. These self-contained integrated subframes support communication in unlicensed or contention-based shared spectrum and enable adaptive uplink / downlink configuration that can be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet current traffic needs.

[0042] Various other aspects and features of this disclosure are further described below. It should be apparent that the teachings herein can be embodied in a variety of forms, and any specific structure, function, or both disclosed herein are merely representative and not limiting. Based on the teachings herein, those skilled in the art will appreciate that the aspects disclosed herein can be implemented independently of any other aspects, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement an apparatus or practice a method. Furthermore, such an apparatus or practice can be implemented using other structures, functionalities, or structures and functionalities that complement or differ from one or more aspects set forth herein. For example, a method can be implemented as part of a system, device, apparatus, and / or as instructions stored on a computer-readable medium for execution on a processor or computer. Moreover, an aspect may include at least one element of the claims.

[0043] The NR can provide a Phase Tracking Reference Signal (PTRS) to facilitate phase tracking at the UE and BS. For example, the BS can include a PTRS in the DL signal to enable the UE to track and correct phase errors in the received DL signal. Similarly, the UE can include a PTRS in the UL signal to enable the BS to track and correct phase errors in the received UL signal. In some instances, the PTRS can be frequently present in both the DL and / or UL signals. For example, the network can use a subcarrier to configure PTRS transmission in either the DL or UL signal at each symbol.

[0044] As described above, DC frequency modulation can cause high noise at DC locations. To avoid PTRS being filtered out by DC suppression filtering or interfered with by DC frequency modulation, the network can schedule PTRS transmissions on frequencies different from one or more frequencies corresponding to the UE's DC frequency modulation. In other words, the network can configure resources for PTRS transmissions based on the DC frequency modulation locations of the UE's transmitter and receiver. However, as described above, different UEs may have different DC frequency modulation locations depending on their RF configurations, which may be based on the UE's CC configuration and / or BWP configuration. Although the UE can report the DC locations used by its transmitter and receiver to the BS, the signaling can be complex. For example, the number of potential DC locations can be large when considering BWPs and CCs, where the radio access network (RAN) can configure up to about 8 CCs in a specific frequency band and up to about 4 configured BWPs in each CC. Therefore, the UE may need to signal to the network to notify up to about 48 combinations of DC locations. Assuming each DC location requires a 12-bit information element field (since the value range is 0 to 3299), reporting 48 DC locations could require at least approximately 800 kilobits of UL signaling space. Furthermore, the UE may need to process received Radio Resource Control (RRC) messages (e.g., including CA / CC / BWP configuration commands) and, in the worst case, send back a response message within approximately 15 milliseconds (ms). For all possible combinations, the computational power required to identify DC locations could be substantial, potentially making it difficult to meet RRC processing time requirements.

[0045] This application describes a mechanism for a UE to efficiently send signaling notifications to a BS to inform the DC location information. The reporting of DC location information can be triggered by events such as carrier aggregation (CA) reconfiguration commands received from the BS, bandwidth portion (BWP) handover commands, and / or BWP reconfiguration commands. The UE can determine the DC location by considering the CA configuration and / or BWP configuration. To reduce the amount of information bits required for signaling, the BS can provide the UE with a reference set of BWPs for DC location reporting. The UE can determine the DC location for the reference BWP set and report the corresponding DC location for the reference BWP. The DC location may include one or more DC locations of the UE's transmitter (e.g., for UL transmission) and one or more DC locations of the UE's receiver (e.g., for downlink reception).

[0046] In one embodiment, the UE may include a frequency band report that includes a DC location that varies with the configured frequency band or BWP. In one embodiment, the UE may report subcarrier offsets within a resource block (RB) that overlap with the DC location and / or the location of the RB. In one embodiment, the UE may select a PTRS-Resource Element (RE)-Offset parameter for the determined DC location and report the PTRS-RE-Offset parameter to the BS. The BS may configure PTRS based on the reported subcarrier offset, the reported RB, and / or the reported PTRS-RE-Offset parameter.

[0047] Figure 1 A wireless communication network 100 according to some embodiments of this disclosure is described. Network 100 may be a 5G network. Network 100 includes several base stations (BS) 105 and other network entities. BS 105 may be a station communicating with UE 115, and may also be referred to as an evolved B-node (eNB), a next-generation eNB (gNB), an access point, etc. Each BS 105 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the specific geographic coverage area of ​​BS 105 and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0048] The BS105 can provide communication coverage for macrocells or small cells (such as picocells or femtocells), and / or other types of cells. Macrocells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UEs with service subscriptions to a network provider. Small cells (such as picocells) typically cover a relatively small geographic area and allow unrestricted access by UEs with service subscriptions to a network provider. Small cells (such as femtocells) also typically cover a relatively small geographic area (e.g., a residential area) and, in addition to unrestricted access, allow restricted access by UEs associated with that femtocell (e.g., UEs in a closed subscriber group (CSG), UEs of users in that residence, etc.). A BS used for macrocells may be referred to as a macro BS. A BS used for small cells may be referred to as a small cell BS, pico BS, femtocell BS, or home BS. Figure 1In the examples shown, BS105d and 105e can be conventional macro BSs, while BS105a-105c can be macro BSs with one of three-dimensional (3D), full-dimensional (FD), or massive MIMO enabled. BS105a-105c can leverage its higher-dimensional MIMO capabilities to increase coverage and capacity using 3D beamforming in both elevation and azimuth beamforming. BS105f can be a small cell BS, which can be a home node or a portable access point. BS105 can support one or more (e.g., two, three, four, etc.) cells.

[0049] Network 100 can support synchronous or asynchronous operation. For synchronous operation, each BS can have similar frame timing, and transmissions from different BSs can be roughly aligned in time. For asynchronous operation, each BS can have different frame timing, and transmissions from different BSs may not be aligned in time.

[0050] Each UE 115 is distributed throughout the wireless network 100, and each UE 115 can be stationary or mobile. UE 115 can also be referred to as a terminal, mobile station, subscriber unit, station, etc. UE 115 can be a cellular phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, tablet computer, laptop computer, cordless phone, wireless local loop (WLL) station, etc. In one aspect, UE 115 can be a device including a Universal Integrated Circuit Card (UICC). In another aspect, UE can be a device without a UICC. In some aspects, UE 115 without a UICC can also be referred to as an IoT device or Internet of Things (IoE) device. UE 115a-115d are examples of mobile smartphone-type devices accessing network 100. UE 115 can also be a machine specifically configured for connected communications, including machine-type communication (MTC), enhanced MTC (eMTC), narrowband IoT (NB-IoT), etc. UE 115e-115k is an example of various machines configured for communication on network 100. UE 115 can communicate with any type of BS (whether macro BS, small cell BS, etc.). Figure 1 In this context, the lightning bolt (e.g., a communication link) indicates radio transmissions between UE 115 and serving BS 105 or desired transmissions between BSs, as well as backhaul transmissions between BSs, where serving BS 105 is the BS designated to serve UE 115 on the downlink and / or uplink.

[0051] In operation, BS105a-105c can use 3D beamforming and coordinated spatial technologies (such as Coordinated Multipoint (CoMP) or multi-connectivity) to serve UEs 115a and 115b. Macro BS105d can perform backhaul communication with BS105a-105c and the small cell BS105f. Macro BS105d can also deliver multicast services subscribed to and received by UEs 115c and 115d. Such multicast services may include mobile TV or streaming video, or may include other services for providing community information (such as weather emergencies or alerts, such as Amber Alerts or Grey Alerts).

[0052] Network 100 can also support mission-critical communication with highly reliable and redundant links for mission-critical devices such as UE 115e, which could be a drone. Redundant communication links with UE 115e may include links from macro BS105d and 105e, and links from small cell BS105f. Other machine-type devices (such as UE 115f (e.g., a thermometer), UE 115g (e.g., a smart meter), and UE 115h (e.g., a wearable device)) can communicate directly with BSs (such as small cell BS105f and macro BS105e) via network 100, or be in a multi-hop configuration by communicating with another user equipment that relays its information to the network (e.g., UE 115f relays temperature measurement information to smart meter UE 115g, which is then reported to the network via small cell BS105f). Network 100 can also provide additional network efficiency through dynamic, low-latency TDD / FDD communication, such as in vehicle-to-vehicle (V2V) communication.

[0053] In some implementations, network 100 utilizes OFDM-based waveforms for communication. OFDM-based systems can divide the system BW into multiple (K) orthogonal subcarriers, which are often referred to as subcarriers, frequency modulation, frequency slots, etc. Each subcarrier can be modulated with data. In some instances, the subcarrier spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system BW. The system BW can also be divided into subbands. In other instances, the subcarrier spacing and / or the duration of the time interval (TTI) can be scalable.

[0054] In one embodiment, BS105 may assign or schedule (e.g., in the form of time-frequency resource blocks (RBs)) transmission resources for downlink (DL) and uplink (UL) transmissions in network 100. DL refers to the transmission direction from BS105 to UE 115, while UL refers to the transmission direction from UE 115 to BS105. This communication may take the form of radio frames. A radio frame may be divided into multiple subframes, for example, about 10. Each subframe may be divided into time slots, for example, about 2. Each time slot may be further divided into sub-time slots. In FDD mode, simultaneous UL and DL transmissions may occur in different frequency bands. For example, each subframe includes UL subframes in the UL band and DL subframes in the DL band. In Time Division Duplex (TDD) mode, UL and DL transmissions occur using the same frequency band at different time periods. For example, a subset of subframes in a radio frame (e.g., DL subframes) may be used for DL ​​transmissions, and another subset of subframes in a radio frame (e.g., UL subframes) may be used for UL transmissions.

[0055] DL subframes and UL subframes can be further divided into several regions. For example, each DL or UL subframe may have a predefined region for the transmission of reference signals, control information, and data. Reference signals are predetermined signals that facilitate communication between BS105 and UE 115. For example, reference signals may have a specific pilot pattern or structure, wherein the pilot frequencies may span an operating BW or frequency band, and each pilot frequency is positioned at a predefined time and a predefined frequency. For example, BS105 may transmit a cell-specific reference signal (CRS) and / or a channel state information reference signal (CSI-RS) to enable UE 115 to estimate the DL channel. Similarly, UE 115 may transmit a probe reference signal (SRS) to enable BS105 to estimate the UL channel. Control information may include resource allocation and protocol control. Data may include protocol data and / or operational data. In some embodiments, BS105 and UE 115 may communicate using self-contained subframes. Self-contained subframes may include portions for DL ​​communication and portions for UL communication. Self-contained subframes can be DL-centered or UL-centered. DL-centered subframes can include a duration longer than that used for UL communication. UL-centered subframes can include a duration longer than that used for UL communication.

[0056] In one embodiment, network 100 may be an NR network deployed on licensed spectrum. BS 105 may transmit synchronization signals (e.g., including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS)) in network 100 to facilitate synchronization. BS 105 may broadcast system information associated with network 100 (e.g., including a primary information block (MIB), residual minimum system information (RMSI), and other system information (OSI)) to facilitate initial network access. In some instances, BS 105 may broadcast PSS, SSS, or MIB in the form of a synchronization signal block (SSB) on the physical broadcast channel (PBCH) and may broadcast RMSI and / or OSI on the physical downlink shared channel (PDSCH).

[0057] In one embodiment, UE 115 attempting to access network 100 can perform an initial cell search by detecting a PSS from BS 105. The PSS enables time-slot synchronization and indicates a physical layer identity value. UE 115 can subsequently receive an SSS. The SSS enables radio frame synchronization and provides a cell identity value, which can be combined with a physical layer identity value to identify the cell. The SSS also enables detection of duplex mode and cyclic prefix length. Some systems (such as TDD systems) may transmit the SSS but not the PSS. Both the PSS and SSS may be located in the center portion of the carrier.

[0058] After receiving the PSS and SSS, UE 115 can receive the MIB. The MIB may include system information for initial network access and scheduling information for RMSI and / or OSI. After decoding the MIB, UE 115 can receive the RMSI and / or OSI. The RMSI and / or OSI may include information related to the Random Access Channel (RACH) procedure, paging, control resource set (CORESET) for monitoring the Physical Downlink Control Channel (PDCCH), Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), power control, SRS, and Radio Resource Configuration (RRC) information related to cell prohibition. After obtaining the MIB, RMSI, and / or OSI, UE 115 can execute the random access procedure to establish a connection with BS105. After the connection is established, UE 115 and BS105 can enter the normal operation phase, during which operational data can be exchanged.

[0059] In some embodiments, network 100 may be an NR network. The DC frequency modulation (DC) location may differ at different UEs 115. In some embodiments, UE 115 may be configured with different DC frequency modulations for different component carrier (CC) configurations. In some embodiments, UE 115 may be configured with different DC frequency modulations for different bandwidth portion (BWP) configurations. At the radio front-end (RF) receiver of UE 115, a peak signal may be present at the DC location. The peak signal is a noise source for signal processing at the receiver. Therefore, the UE's baseband processing may filter out some frequencies near the DC frequency modulation. In one embodiment, BS 105 may transmit a phase tracking reference signal (PTRS) to facilitate phase tracking at UE 115. To avoid conflicts between the PTRS and the DC frequency modulation location of UE 115, UE 115 may report the corresponding DC frequency modulation location to BS 105, and BS may configure the PTRS based on the DC frequency modulation location report. U.S. Patent Application No. 15 / 707,821 and U.S. Publication No. 2018 / 0091350 describe enhancements to the PTRS design and scrambling, the entire contents of each of which are incorporated herein by reference for all applicable purposes. The mechanisms for DC frequency modulation position reporting and PTRS configuration are described in more detail herein.

[0060] Figure 2 An example scenario 200 with UEs having different DC locations is described according to some embodiments of this disclosure. The UE may correspond to UE 115 in network 100. Figure 2 In this diagram, the y-axis represents frequency in certain constant units. For example, the network can be configured with two CCs, 210 and 220. UE A and UE B of the network can have different DC positions. For example, UE A can use one RF and / or baseband chain for communication on CC 210 and another RF and / or baseband chain for communication on CC 220. Conversely, UE B can use the same RF and / or baseband chain for communication on both CC 210 and CC 220. As shown, UE A is configured with DC position 202 for CC 210 and a different DC position 206 for CC 220, while UE B is configured with DC position 204 for both CC 210 and CC 220. DC positions 202 and 206 can be the DC positions of the transmitter and / or receiver of UE A. Similarly, DC position 204 can be the DC position of the transmitter and / or receiver of UE B.

[0061] In one embodiment, the UE may determine the DC location based on the current RF configuration. The current RF configuration may depend on the carrier aggregation (CA) configuration and / or the active BWP configuration. In some embodiments, the UE's transmitter and receiver may have different DC locations. In some other embodiments, the UE's transmitter and receiver may have the same DC location.

[0062] In one embodiment, the DC location of the UE depends on the UE implementation. Thus, each UE in the network can have a different DC location. For example, one UE (chipset) can select the center frequency of the CC as the DC location, another UE (chipset) can select the center frequency of the adjacent CC, or yet another UE (chipset) can select the center frequencies of all configured CCs, regardless of whether the CCs are adjacent or non-adjacent.

[0063] In one embodiment, the UE can further determine the DC location based on the configured BWP. Each BWP can have a different center frequency, and the UE can change the DC location upon receiving a BWP handover command to another configured BWP. Thus, the UE can have different DC locations for different BWPs.

[0064] Figure 3 Example BWP configuration 300 according to some embodiments of this disclosure is described. Configuration 300 can be used by network 100 for BWP configuration. For example, a BS (such as BS 105) can configure up to about four BWPs for each CC (e.g., CC 210 and 220), and a UE (such as UE 115) can be configured where one of the BWPs acts as the active BWP for data communication. Figure 3 In this configuration, the y-axis represents frequency in certain constant units. Configuration 300 includes BWP 310 and BWP 320. BWP 310 and 320 have the same center frequency 302. In one embodiment, when the UE is configured with BWP 310 and 320, the UE can configure the same DC position for both BWP 310 and 320. In other words, when switching between BWP 310 and 320, the UE may not change its DC position.

[0065] Figure 4 Example BWP configuration 400 according to some embodiments of the specification is explained. Configuration 400 can be adopted by network 100. Figure 4In this configuration, the y-axis represents frequency in certain constant units. Similar to configuration 300, a BS (such as BS105) can configure up to approximately four BWPs for each CC (e.g., CCs 210 and 220), and a UE (such as UE 115) can be configured where one of the BWPs serves as the active BWP for data communication. However, the BS can configure the BWPs to have different center frequencies. As shown, configuration 400 includes BWP 410 and BWP 420. BWP 410 includes a center frequency 402. BWP 420 includes a center frequency 404 different from center frequency 402. In one embodiment, the UE can apply different DC positions for BWPs 410 and 420. In other words, the UE can change its DC position when switching between BWPs 410 and 420.

[0066] Figure 5 This is a block diagram of an exemplary UE 500 according to various embodiments of the present disclosure. UE 500 may be UE 115 or UE 215 as discussed above. As shown, UE 500 may include a processor 502, a memory 504, a DC location reporting module 508, a transceiver 510 (including a modem subsystem 512 and a radio frequency (RF) unit 514), and one or more antennas 516. These components may communicate directly or indirectly with each other, for example, via one or more buses.

[0067] Processor 502 may include a central processing unit (CPU), digital signal processor (DSP), application-specific integrated circuit (ASIC), controller, field-programmable gate array (FPGA) device, other hardware device, firmware device, or any combination thereof configured to perform the operations described herein. Processor 502 may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration.

[0068] Memory 504 may include cache memory (e.g., the cache memory of processor 502), random access memory (RAM), magnetoresistive RAM (MRAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, solid-state memory device, hard disk drive, other forms of volatile and non-volatile memory, or a combination of different types of memory. In one embodiment, memory 504 includes a non-transient computer-readable medium. Memory 504 may store instructions 506. Instructions 506 may include, when executed by processor 502, causing processor 502 to perform the various embodiments incorporated herein by reference (e.g., ...). Figures 7-14(All aspects of the operation) Instructions that refer to the operation described in UE 115. Instruction 506 may also be referred to as code. The terms “instruction” and “code” should be interpreted broadly to include any type of computer-readable statement(s). For example, the terms “instruction” and “code” can refer to one or more programs, routines, subroutines, functions, procedures, etc. “Instruction” and “code” can include a single computer-readable statement or many computer-readable statements.

[0069] The DC position reporting module 508 may be implemented via hardware, software, or a combination thereof. For example, the DC position reporting module 508 may be implemented as a processor, circuitry, and / or instructions 506 stored in memory 504 and executed by processor 502. In some examples, the DC position reporting module 508 may be integrated within the modem subsystem 512. For example, the DC position reporting module 508 may be implemented by a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 512.

[0070] The DC location reporting module 508 can be used in various aspects of this disclosure, for example, Figures 7-14 Various aspects. For example, the DC location reporting module 508 is configured to receive CA configuration / reconfiguration commands, CC configuration / reconfiguration commands, and / or BWP configuration / handover commands from a BS (such as BS105), determine the DC location based on the received commands and / or the RF implementation of the UE 500, select a UL PTRS configuration and / or a DL PTRS configuration based on the determined DC location, report the DC location information and / or the PTRS configuration selection to the BS, receive the UL and / or DL ​​PTRS configuration from the BS, and / or include PTRS in the UL transmission based on the received UL and / or DL ​​PTRS configuration, as described in more detail herein.

[0071] As shown, transceiver 510 may include modem subsystem 512 and RF unit 514. Transceiver 510 may be configured to communicate bidirectionally with other devices (such as BS105). Modem subsystem 512 may be configured to modulate and / or encode data from memory 504 and / or DC position reporting module 508 according to modulation and coding schemes (MCS) (e.g., low-density parity-check (LDPC) coding scheme, turbo coding scheme, convolutional coding scheme, digital beamforming scheme, etc.). RF unit 514 may be configured to process (e.g., perform analog-to-digital conversion or digital-to-analog conversion, etc.) modulated / coded data transmitted from modem subsystem 512 (in out-of-band transmission) or originating from another source (such as UE 115 or BS105). RF unit 514 may be further configured to perform analog beamforming in conjunction with digital beamforming. Although shown as being integrated together in transceiver 510, modem subsystem 512 and RF unit 514 may be separate devices coupled together at UE 115 to enable UE 115 to communicate with other devices.

[0072] RF unit 514 can provide modulated and / or processed data (e.g., data packets (or, more generally, data messages containing one or more data packets and other information)) to antenna 516 for transmission to one or more other devices. Antenna 516 can further receive data messages transmitted from other devices. Antenna 516 can provide received data messages for processing and / or demodulation at transceiver 510. Antenna 516 may include multiple antennas of similar or different designs to maintain multiple transmission links. RF unit 514 can configure antenna 516.

[0073] In some embodiments, the UE 500 may include multiple modem subsystems 512 and / or multiple RF units 514. Modem subsystems 512 may perform processing at the baseband level. Therefore, modem subsystems 512 may be referred to as baseband transmitters and / or baseband receivers. In the transmit path, RF units 514 may include an RF upconverter that upconverts the UL baseband signal generated by the modem subsystems 512 to a corresponding RF carrier frequency for transmission on antenna 516. In the receive path, RF units 514 may include an RF downconverter that downconverts the DL RF signal received from antenna 516 back to baseband for processing by modem subsystems 512. In some embodiments, modem subsystems 512 and / or RF units 514 may be configured based on BWP configurations and / or CA configurations received from the BS. In some embodiments, the same modem subsystem 512 and the same RF unit 514 may be used for all BWP configurations and all CA configurations.

[0074] Figure 6 This is a block diagram of an exemplary BS 600 according to various embodiments of the present disclosure. BS 600 may be BS 105 as discussed above. As shown, BS 600 may include a processor 602, a memory 604, a PTRS configuration module 608, a transceiver 610 (including a modem subsystem 612 and an RF unit 614), and one or more antennas 616. These components may communicate directly or indirectly with each other, for example, via one or more buses.

[0075] Processor 602 may have various features as a special-purpose processor. For example, these features may include a CPU, DSP, ASIC, controller, FPGA device, another hardware device, firmware device, or any combination thereof configured to perform the operations described herein. Processor 602 may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration.

[0076] Memory 604 may include cache memory (e.g., the cache memory of processor 602), RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, solid-state memory device, one or more hard disk drives, memristor-based arrays, other forms of volatile and non-volatile memory, or combinations of different types of memory. In some embodiments, memory 604 may include a non-transient computer-readable medium. Memory 604 may store instructions 606. Instructions 606 may include causing processor 602 to perform the operations described herein when executed by processor 602 (e.g., ...). Figures 7-13 Instructions (and aspects of 15). Instruction 606 can also be referred to as code, which can be broadly interpreted as including, as referenced above. Figure 5 Any type of computer-readable statement discussed.

[0077] The PTRS configuration module 608 may be implemented via hardware, software, or a combination thereof. For example, the PTRS configuration module 608 may be implemented as a processor, circuitry, and / or instructions 606 stored in memory 604 and executed by processor 602. In some examples, the PTRS configuration module 608 may be integrated within the modem subsystem 612. For example, the PTRS configuration module 608 may be implemented by a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 612.

[0078] The PTRS configuration module 608 can be used in various aspects of this disclosure, for example,Figures 7-13 And aspects of 15. For example, PTRS configuration module 608 is configured to determine CA configuration / reconfiguration, CC configuration / reconfiguration, and / or BWP configuration / handover for UEs (such as UEs 115 and 500), receive DC location reports and / or PTRS configuration selections from the UE, configure PTRS for the UE to avoid the DC location indicated in the report or configure PTRS for the UE based on the PTRS configuration selection to facilitate phase tracking at the UE, and / or include PTRS in DL signal transmissions, as described in more detail herein.

[0079] As shown, transceiver 610 may include a modem subsystem 612 and an RF unit 614. Transceiver 610 may be configured to communicate bidirectionally with other devices, such as UE 115 and / or another core network element. Modem subsystem 612 may be configured to modulate and / or encode data according to an MCS (e.g., LDPC coding scheme, turbo coding scheme, convolutional coding scheme, digital beamforming scheme, etc.). RF unit 614 may be configured to process (e.g., perform analog-to-digital conversion or digital-to-analog conversion, etc.) modulated / encoded data transmitted from modem subsystem 612 (in out-of-band transmission) or originating from another source (such as UE 115 or 500). RF unit 614 may be further configured to perform analog beamforming in conjunction with digital beamforming. Although shown as being integrated together in transceiver 610, modem subsystem 612 and RF unit 614 may be separate devices coupled together at BS 105 to enable BS 105 to communicate with other devices.

[0080] RF unit 614 may provide modulated and / or processed data (e.g., data packets (or, more generally, data messages containing one or more data packets and other information)) to antenna 616 for transmission to one or more other devices. This may include, for example, information transmission for establishing attachment to a network and communication with the resident UE 115 or 500, as described in various embodiments of this disclosure. Antenna 616 may further receive data messages transmitted from other devices and provide the received data messages for processing and / or demodulation at transceiver 610. Antenna 616 may include multiple antennas of similar or different designs to maintain multiple transmission links.

[0081] Figures 7-9 The various mechanisms for reporting DC location based on events triggered by CA reconfiguration, BWP switching, and / or BWP reconfiguration are explained.

[0082] Figure 7This is a signaling diagram illustrating a DC location reporting method 700 according to some embodiments of the specification. Method 700 is employed by network 100. The steps of method 700 may be performed by a computing device (e.g., processor, processing circuitry, and / or other suitable components) of a wireless communication device (such as BS 105 and 600 and UE 115 and 500). As explained, method 700 includes several enumeration steps, but embodiments of method 700 may include additional steps before, after, and between the enumeration steps. In some embodiments, one or more of the enumeration steps may be omitted or performed in a different order. Method 700 illustrates one BS and one UE for the purpose of simplifying the discussion, but it will be appreciated that the embodiments of this disclosure can be scaled to many more UEs and / or BSs. Method 700 illustrates DC reporting based on CA reconfiguration.

[0083] In step 710, the BS transmits a CA reconfiguration command to the UE. CA reconfiguration may include removing CCs (e.g., CCs 210 and 210) and / or adding CCs to the previous CA configuration.

[0084] In step 720, upon receiving a CA reconfiguration command, the UE can determine the DC location based on the reconfigured CA configuration. In some embodiments, the UE can determine the DC location of its transmitter and the DC location of its receiver.

[0085] In step 730, the UE may transmit a DC location report to the BS. The DC location report may indicate the DC location determined by the reconfigured CA configuration.

[0086] In step 740, the BS determines the PTRS configuration based on the DC location report. For example, the BS may configure UL and / or DL ​​resources for PTRS transmission to avoid DC frequency modulation indicated in the received DC location report.

[0087] In step 750, the BS transmits the PTRS configuration to the UE.

[0088] In step 760, the BS uses configured DL resources to transmit PTRS to facilitate phase tracking at the UE. For example, the PTRS is included in the DL signal carrying DL data.

[0089] In step 770, the UE uses configured UL resources to transmit PTRS to facilitate phase tracking at the BS. For example, the PTRS is included in the UL signal carrying UL data.

[0090] Triggering of DC location reports based on CA reconfiguration may be appropriate when all configured BWPs have the same center frequency (e.g., as shown in configuration 300) or when only one BWP exists within a carrier.

[0091] Figure 8 This is a signaling diagram illustrating a DC location reporting method 800 according to some embodiments of the specification. Method 800 is employed by network 100. The steps of method 800 may be performed by a computing device (e.g., processor, processing circuitry, and / or other suitable components) of a wireless communication device (such as BS 105 and 600 and UE 115 and 500). As explained, method 800 includes several enumeration steps, but embodiments of method 800 may include additional steps before, after, and between the enumeration steps. In some embodiments, one or more of the enumeration steps may be omitted or performed in a different order. Method 800 illustrates one BS and one UE for the purpose of simplifying the discussion, but it will be appreciated that the embodiments of this disclosure can be scaled to many more UEs and / or BSs. Method 800 illustrates DC reporting based on BWP handover.

[0092] In step 810, the BS transmits a BWP handover command to the UE. For example, the BWP handover command can switch one or more active BWPs of the UE (e.g., BWPs 310, 320, 410, and 420) to other BWPs. In one embodiment, the BS can use an RRC reconfiguration procedure to switch the UE's active BWPs.

[0093] In step 820, upon receiving a BWP handover command, the UE can determine the DC location based on the active BWP indicated by the BWP handover command. In some embodiments, the UE can determine the DC location of its transmitter and the DC location of its receiver.

[0094] In step 830, the UE may transmit a DC location report to the BS. The DC location report may indicate the DC location determined for the switched BWP.

[0095] In step 840, the BS determines the PTRS configuration based on the DC location report. For example, the BS may configure UL and / or DL ​​resources for PTRS transmission to avoid DC frequency modulation indicated in the received DC location report.

[0096] In step 850, the BS transmits the PTRS configuration to the UE.

[0097] In step 860, the BS uses configured DL resources to transmit PTRS to facilitate phase tracking at the UE. For example, the PTRS is included in the DL signal carrying DL data.

[0098] In step 870, the UE uses configured UL resources to transmit PTRS to facilitate phase tracking at the BS. For example, the PTRS is included in the UL signal carrying UL data.

[0099] Figure 9 This is a signaling diagram illustrating a DC location reporting method 900 according to some embodiments of the present disclosure. Method 900 is employed by network 100. The steps of method 900 may be performed by a computing device (e.g., processor, processing circuitry, and / or other suitable components) of a wireless communication device (such as BS 105 and 600 and UE 115 and 500). As explained, method 900 includes several enumeration steps, but embodiments of method 900 may include additional steps before, after, and between the enumeration steps. In some embodiments, one or more of the enumeration steps may be omitted or performed in a different order. Method 900 illustrates one BS and one UE for the purpose of simplifying the discussion, but it will be appreciated that embodiments of the present disclosure can be scaled to many more UEs and / or BSs. Method 900 illustrates DC reporting based on BWP reconfiguration, taking into account CA configuration.

[0100] In step 910, the BS transmits a BWP reconfiguration command to the UE. BWP reconfiguration may include removing BWPs (e.g., BWP310, 320, 410, and 420) and / or adding BWPs to a previous BWP configuration.

[0101] In step 920, upon receiving a BWP reconfiguration command, the UE can determine the DC location based on one or more reconfigured BWPs and the CA configuration currently being used by the UE. In some embodiments, the UE can determine the DC location of its transmitter and the DC location of its receiver.

[0102] In step 930, the UE may transmit a DC location report to the BS. The DC location report may indicate a DC location determined by one or more reconfigured BWPs.

[0103] In step 940, the BS determines the PTRS configuration based on the DC location report. For example, the BS may configure UL and / or DL ​​resources for PTRS transmission to avoid DC frequency modulation indicated in the received DC location report.

[0104] In step 950, the BS transmits the PTRS configuration to the UE.

[0105] In step 960, the BS uses configured DL resources to transmit PTRS to facilitate phase tracking at the UE. For example, the PTRS is included in the DL signal carrying DL data.

[0106] In step 970, the UE uses configured UL resources to transmit PTRS to facilitate phase tracking at the BS. For example, the PTRS is included in the UL signal carrying UL data.

[0107] In one embodiment, to avoid a large amount of UL DC location reporting signaling, the network can signal across all configured CCs to notify a limited number of potential combinations of active BWPs. In this way, the UE can signal the DC location for potential active BWP combinations.

[0108] In one embodiment, a BS (e.g., BS105 and BS 600) may configure a reference BWP set. Configuration of the reference BWP set may be performed at the RRC layer of a particular UE. The reference BWP set may be in a single CC or span multiple CCs. In some embodiments, the reference BWP set may be a subset of the UE's configured BWPs. The UE may determine DC locations for the reference BWP set. In some embodiments, the UE may transmit a DC location report including a frequency band report indicating a set of DC locations dependent on frequency band combinations.

[0109] Figure 10 A DC location reporting method 1000 according to some embodiments of this disclosure has been described. This method can be employed by a network 100. Specifically, method 1000 can be implemented by a UE (such as UE 115 and 500) for DC location reporting. Figure 10 In this context, the y-axis represents frequency using certain constant units. Method 1000 can be compared with the above methods regarding... Figure 7 , 8 This is used in conjunction with methods 700, 800, and 900 described in section 9. As an example, the UE's RF chain can receive three in-band CCs 1010, 1020, and 1030 (e.g., CCs 210 and 220). The UE can use a single local oscillator to downconvert the received RF signal to a baseband signal with a DC frequency 1002. As shown, the DC frequency 1002 is mapped to a subcarrier 1042 with index 6 within a resource block (RB) 1040 where the DC frequency 1002 resides. The UE can report subcarrier index 6 within RB 1040 to the BS (e.g., BS 105 and 600). For example, the UE can report a subcarrier index offset value to the BS. See below for reference. Figure 11 The DC location report message is described in more detail. Upon receiving the report, the BS can configure the UE to have a PTRS that does not overlap with the subcarrier indexed 6, in order to avoid conflicts between the PTRS and DC frequency modulation.

[0110] Although method 1000 is described in the context of reporting the DC location of the UE's receiver, method 1000 can be applied to reporting the DC location of the UE's transmitter. For example, the DC location of the UE's transmitter can be implemented based on the UE's baseband and upconversion hardware.

[0111] Figure 11The DC location reporting message element 1100 according to some embodiments of the present disclosure has been explained. Message element 1100 can be used by a UE (such as UE 115 and 500) to report DC location information. As described above in method 1000, the UE can report a subcarrier offset within an RB to indicate the DC location (e.g., DC frequency 1002). In one embodiment, message element 1100 can have a length of 4 bits (e.g., shown as b0, b1, b2, and b3). Message element 1100 can have values ​​varying between 0 and 15.

[0112] For example, when message element 1100 includes a value between 0 and 11, the value indicates the DC subcarrier index within the RB (e.g., RB 1040) where the DC frequency resides. Value 12 in message element 1100 can indicate a don't-care condition where the DC frequency modulation may be outside the band of interest, or where the UE can apply an algorithm with strong DC suppression. Value 13 in message element 1100 can indicate a nondeterministic condition where the DC frequency modulation may reside within the RB (e.g., RB 1040), but the mapping from the DC frequency modulation to the subcarrier index may not be specified. This corresponds to scenarios where the UE uses fast frequency hopping and therefore the DC location changes rapidly. Remaining values ​​14 and 15 can be reserved for future use.

[0113] The UE can transmit message element 1100 via Physical Uplink Control Channel (PUCCH) signaling or RRC signaling. The UE can use any suitable signaling configuration to provide DC location information to the BS, depending on the UE's implementation and / or application. For example, the UE can transmit message element 1100 for each CC and / or each BWP. Alternatively, the UE can transmit message element 1100 for a set of in-band CCs (e.g., CCs 1010, 1020, and 1030) in a CA scenario. Still alternatively, the UE can transmit message element 1100 for the entire frequency band. For the scenario described in method 1000, the UE can report the subcarrier index of 6 for DC location reporting.

[0114] In some embodiments, the UE may transmit two message elements 1100 (e.g., a total of 8 bits), one indicating the DC location of the UE's transmitter and the other indicating the DC location of the UE's receiver. Although message element 1100 is interpreted as having a 4-bit length, it can alternatively be configured to include different bit lengths (e.g., 5, 8, or greater) to achieve similar functionality. A 4-bit length can be configured to support reporting with approximately twelve subcarriers (e.g., Figure 10The subcarrier offset in the RB (e.g., RB 1040) with subcarriers indexed 0-11 in the index, and provides additional irrelevant conditions.

[0115] In some embodiments, the UE may include a BWP index or a CC index with each message element 1100. For example, the UE may report four DC locations for four BWPs by including the BWP index for each BWP and message element 1100 in the report. Alternatively, the UE may report eight DC locations for eight CCs by including the CC index for each CC and message element 1100 in the report.

[0116] In some other embodiments, the UE may use the absolute radio frequency channel number (ARFCN) instead of message element 1100 to report the UE's DC location. For example, the UE may include the ARFCN for each corresponding BWP or each CC in the report.

[0117] In some other embodiments, the UE may have a DC frequency modulation located between two adjacent subcarriers, wherein the DC frequency modulation may affect or interfere with the two subcarriers equally or comparablely. In such embodiments, message element 1100 may be extended to include a length of approximately 5 bits, with values ​​varying between 0 and 31. For example, values ​​between 0 and 13 may represent the same DC information described above. Other values ​​(e.g., between 14 and 25) may indicate a DC location between two adjacent subcarriers. For example, value 14 may indicate a DC location between subcarriers indexed 0 and 1. Similarly, value 15 may indicate a DC location between subcarriers indexed 1 and 2, and so on. Similarly or alternatively, value 25 may indicate a DC location between a subcarrier at index 11 in the RB and a subcarrier at index 0 in the next RB (e.g., the DC frequency modulation resides on the boundary between two adjacent RBs). Remaining values ​​26 to 31 may be reserved for future use. In some other embodiments, the values ​​in message element 1100 may alternatively be configured to achieve similar functionality.

[0118] Figure 12 A PTRS RE-level offset configuration 1200 according to some embodiments of this disclosure is described. Configuration 1200 can be adopted by a network (such as network 100). Specifically, a BS (such as BS 105 and 600) can use configuration 1200 to configure PTRS based on DC location reports received from UEs (such as UE 115 and 500). As shown, the PTRS configuration can be associated with a demodulation reference signal (DMRS) port configuration. Each DMRS port configuration refers to a mapping of the DMRS to a physical RE or subcarrier for a specific antenna port. Furthermore, different types of DMRS may have different DMRS port configurations.

[0119] exist Figure 12 In the diagram, column 1210 shows the PTRS-RE-offset configuration represented by binary values ​​00, 01, 10, and 11. Columns 1220, 1230, 1240, and 1250 show the subcarrier indices or offsets (e.g., in decimal format) configured or mapped for PTRS transmissions associated with DMRS port numbers represented by DMRS port numbers 1000, 1001, 1002, and 1003, respectively, when up to four DMRS ports are configured. As an example, when the PTRS-RE-offset is configured as 01 and the associated DMRS port number is 1001, a resource element (RE) or subcarrier offset at 4 can be used to transmit PTRS (e.g., at each symbol of the data signal), as shown by dashed circle 1202. The PTRS-RE-offset configuration 1200 can be similar to the PTRS-RE-offset configuration defined in 3GPP document TS 38.211 version 15.1.0 dated April 3, 2018.

[0120] In some embodiments, the BS can determine the PTRS-RE-offset configuration for UL PTRS and the PTRS-RE-offset configuration for DL ​​PTRS. Alternatively, the BS can determine the PTRS-RE-offset configuration based on the DMRS configuration type. For example, the NR can support DMRS configuration type 1 and DMRS configuration type 2. Therefore, the BS can determine the UL PTRS-RE-offset configuration and DL PTRS-RE-offset configuration for DLPTRS for DMRS configuration type 1, and the UL PTRS-RE-offset configuration and DL PTRS-RE-offset configuration for DL ​​PTRS for DMRS configuration type 2.

[0121] In some embodiments, the use of DMRS configuration type 1 or DMRS configuration type 2 may depend on the configuration varying from UE to DMRS. For example, DMRS configuration type 1 may support up to approximately 4 ports, while DMRS configuration type 2 may support up to approximately 6 ports (in the case of a single DMRS symbol configuration). Additionally, DMRS configuration type 1 may have a higher DMRS frequency modulation density than DMRS configuration type 2. Therefore, DMRS configuration type 1 may take into account improved channel estimation performance. Thus, DMRS configuration type 1 can be used for transmissions where low-rank, high reliability is important, such as broadcast information. Conversely, DMRS configuration type 2 can be used for transmissions where high-rank, high data rate is important.

[0122] For the scenario described in method 1000, where the UE's receiver DC frequency modulation overlaps with a subcarrier indexed 6, the BS may not configure the UE to have a DL-PTRS-RE-offset of 10 (e.g., having a subcarrier indexed 6 as shown in dashed circle 1204) to avoid conflict between the DL PTRS and the UE's receiver DC frequency modulation. Similarly, when the DC location report in method 1000 includes the UE's transmitter DC frequency modulation, the BS may not configure the UE to have a UL-PTRS-RE-offset of 10 to avoid conflict between the UL PTRS and the UE's transmitter DC frequency modulation. In one embodiment, the BS may not need the absolute frequency of the DC location to determine the DL-PTRS-RE-offset and / or the UL-PTRS-RE-offset.

[0123] In another example, the UE's receiver may include a DC frequency between subcarriers indexed 5 and 6. For example, the DC frequency might generate a peak signal at the UE's receiver, interfering with the subcarriers indexed 5 and 6. Therefore, the BS may not configure the UE with a DL-PTRS-RE-offset of 01 or 10 to avoid conflicts between the DL PTRS and the DC peak signal at the subcarriers indexed 5 and 6.

[0124] Figure 13 A DC location reporting message element 1300 according to some embodiments of this disclosure has been described. Message element 1300 can be used by a UE (such as UE 115 and 500) to report DC location information. As described above in method 1000, the UE can report a subcarrier offset within an RB to indicate the DC location (e.g., DC frequency 1002). In one embodiment, message element 1300 can have a length of 4 bits (e.g., shown as b0, b1, b2, and b3). Message element 1300 can include fields 1310 and 1320. Field 1310 can be approximately 2 bits in length and can indicate a PTRS-RE-offset configuration for DMRS configuration type 1. Field 1320 can be approximately 2 bits in length and can indicate a PTRS-RE-offset configuration for DMRS configuration type 2. The PTRS-RE-offset configuration in field 1310 or field 1320 can correspond to a value in column 1210 of configuration 1200. In other words, instead of having the UE report the subcarrier position of the DC frequency of its transmitter or receiver, the UE can select a PTRS-RE-offset configuration available to the BS and report that PTRS-RE-offset configuration directly to the BS. The BS can then configure PTRS based on the PTRS-RE-offset configuration selected by the UE.

[0125] In some embodiments, the UE may transmit two message elements 1300, one indicating a PTRS-RE-offset configuration for UL and the other indicating a PTRS-RE-offset configuration for DL. Although message element 1300 is interpreted as having a 4-bit length, message element 1300 may alternatively be configured to include different bit lengths (e.g., 6, 8, or greater) to achieve similar functionality as the number of DMRS port configurations or the number of DMRS types increases.

[0126] Figure 14 This is a flowchart of a DC location reporting and PTRS communication method 1400 according to various embodiments of the present disclosure. The steps of method 1400 can be performed by a computing device of a wireless communication device (e.g., a processor, processing circuitry, and / or other suitable components) or other suitable means for performing the steps. For example, a wireless communication device (such as UE 115 or UE 500) can utilize one or more components (such as processor 502, memory 504, DC location reporting module 508, transceiver 510, modem 512, and one or more antennas 516) to perform the steps of method 1400. Additionally or alternatively, and particularly, processor 502 can be configured to perform step 1420, and transceiver 510 can be configured to perform steps 1410, 1430, and / or optionally step 1440. Method 1400 can employ the methods described above with respect to... Figure 7 , 8 The mechanisms are similar to those in methods 700, 800, 900, and 1000 as described in 9 and 10. As explained, method 1400 includes several enumeration steps, but embodiments of method 1400 may include additional steps before, after, and between the enumeration steps. In some embodiments, one or more of the enumeration steps may be omitted or performed in a different order.

[0127] In step 1410, method 1400 includes receiving at least one of a CA configuration or a BWP configuration from a base station (e.g., BS105 and 600) by a wireless communication device. In some instances, the CA configuration may be a CA reconfiguration, and the BWP configuration may be associated with a BWP reconfiguration or active BWP handover.

[0128] In step 1420, method 1400 includes determining the DC location (e.g., DC locations 202, 204, 206, and 1002) by a wireless communication device based on at least one of a CA configuration or a BWP configuration.

[0129] In step 1430, method 1400 includes transmitting a report based on the determined DC location to a base station via a wireless communication device.

[0130] In step 1440, method 1400 may optionally include: a wireless communication device communicating a phase tracking reference signal (PTRS) based on a report configuration to a base station.

[0131] In one embodiment, the report may include subcarrier offset information for one or more subcarriers overlapping with the DC location of the wireless communication device. For example, the subcarrier offset information may indicate subcarrier index 6 of method 1000 described above. Alternatively, the subcarrier offset information may indicate that the DC location is between two adjacent subcarriers. The report may include a message element similar to message element 1100. Alternatively, the report may indicate the location of the RB including the DC location. In such an embodiment, the wireless communication device can receive RE mappings (e.g., PTRS) from the BS for conveying PTRS from the BS. Figure 12 (PTRS-RE-offset configuration in column 1210).

[0132] In one embodiment, the wireless communication device may determine the RE mapping for conveying PTRS based on the determined DC location, and may include the RE mapping in a report. For example, the report may include a message element similar to message element 1300.

[0133] In one embodiment, the DC location may correspond to the DC location of the transmitter of the wireless communication device. In such an embodiment, communicating PTRS with the base station by the wireless communication device may include transmitting PTRS to the base station.

[0134] In one embodiment, the DC location may correspond to the DC location of the receiver of the wireless communication device. In such an embodiment, communicating PTRS with the base station by the wireless communication device may include receiving PTRS from the base station.

[0135] Figure 15 This is a flowchart of a PTRS communication method 1500 according to various embodiments of the present disclosure. The steps of method 1500 can be performed by a computing device of a wireless communication device (e.g., a processor, processing circuitry, and / or other suitable components) or other suitable means for performing the steps. For example, a wireless communication device (such as BS 105 or BS 600) can utilize one or more components (such as processor 602, memory 604, PTRS configuration module 608, transceiver 610, and one or more antennas 616) to perform the steps of method 1500. Additionally or alternatively, and particularly, processor 602 can be configured to perform step 1530, and transceiver 610 can be configured to perform steps 1510, 1520, and / or optionally step 1540. Method 1500 can employ the methods described above with respect to... Figure 7 , 8Mechanisms similar to those described in methods 700, 800, 900, and 1000, and configuration 1200, as well as those described in 9, 10, and 12. As explained, method 1500 includes several enumeration steps, but embodiments of method 1500 may include additional steps before, after, and between the enumeration steps. In some embodiments, one or more of the enumeration steps may be omitted or performed in a different order.

[0136] In step 1510, method 1500 includes transmitting at least one of a CA configuration or a BWP configuration from the BS to a wireless communication device (e.g., UEs 115 and 500). In some instances, the CA configuration may be a CA reconfiguration, and the BWP configuration may be associated with a BWP reconfiguration or active BWP handover.

[0137] In step 1520, method 1500 includes: the BS receiving from the wireless communication device a report indicating DC location information associated with the wireless communication device in response to at least one of CA configuration or BWP configuration.

[0138] In step 1530, method 1500 includes: the BS determining the PTRS configuration based on the DC location information in the report (e.g., similar to...). Figure 12 (RE mapping of PTRS-RE-offset configuration in column 1210).

[0139] In step 1540, method 1500 may optionally include: the BS communicating PTRS with the wireless communication device based on the determined PTRS configuration.

[0140] In one embodiment, the report may include subcarrier offset information for one or more subcarriers overlapping with the DC location of the wireless communication device. For example, the subcarrier offset information may indicate subcarrier index 6 of method 1000 described above. Alternatively, the subcarrier offset information may indicate that the DC location is between two adjacent subcarriers. The report may include a message element similar to message element 1100. Alternatively, the report may include an RB including the DC location of the wireless communication device. In one embodiment, the report may include a RE mapping for conveying PTRS. For example, the report may include a message element similar to message element 1300. In one embodiment, the BS may determine the PTRS configuration by configuring UL and / or DL ​​resources for UL and / or PTRS transmission to avoid using subcarriers overlapping with the DC location of the wireless communication device.

[0141] In one embodiment, the DC location may correspond to the DC location of the transmitter of the wireless communication device. In such an embodiment, the communication of PTRS between the BS and the wireless communication device may include receiving PTRS from the BS based on the DC location information reported.

[0142] In one embodiment, the DC location may correspond to the DC location of the receiver of the wireless communication device. In such an embodiment, the BS communicating the PTRS with the wireless communication device may include transmitting the PTRS to the BS based on the DC location information in the report.

[0143] In one embodiment, for UL, DC location signaling is included in the RRCReconfigurationComplete message. The UE reports the DC location of each configured BWP and each serving cell during BWP configuration and serving cell configuration. The UE may send an RRCReconfigurationComplete message to the BS to confirm the successful completion of the RRC connection reconfiguration. The RRCReconfigurationComplete message includes an uplinkTxDirectCurrentList information element (IE). The uplinkTxDirectCurrentList IE indicates the Tx DC location of each serving cell for each configured UL BWP based on the BWP parameter set and associated carrier bandwidth. The UplinkTxDirectCurrentList IE includes a sequence of UplinkTxDirectCurrentCell fields, as follows:

[0144] UplinkTxDirectCurrentList::=SEQUENCE of UplinkTxDirectCurrentCell

[0145] (SIZE(1..maxNrofServingCells))

[0146] Each UplinkTxDirectCurrentCell field consists of a sequence of tuples, each tuple containing a servCellIndex field and an uplinkDirectCurrentBWP field, as shown below:

[0147] UplinkTxDirectCurrentCell::=SEQUENCE{servCellIndex ServCellIndex,(config serving cell,0=pcell,1=scell uplinkDirectCurrentBWPUPlinkTxDirectCurrentBWP SEQUENCE(SIZE(1..maxNrofBWPs)), ...

[0149] }

[0150] The `servCellIndex` field indicates the serving cell ID of the serving cell corresponding to `uplinkDCLocationsPerBWP`. For example, the `servCellIndex` field can be set to a value of 0 to indicate the primary cell (PCell), a value of 1 to indicate the first secondary cell (SCell), or a value of 2 to indicate the second SCell. The `uplinkDirectCurrentBWP` field indicates the Tx DC location of all uplink BWPs configured at the corresponding serving cell.

[0151] The uplinkDirectCurrentBWP field consists of a sequence of tuples, each containing a bwp-Id field, a shift7dot5kHz field, and a txDirectCurrentLocation field, as shown below:

[0152]

[0153] The `bwp-Id` field indicates the BWP-Id of the corresponding uplink BWP. The `shift7dot5kHz` field indicates whether a 7.5kHz shift is present. If this field is set to TRUE, a 7.5kHz shift is applied. For example, a 7.5kHz shift can be applied to `txDirectCurrentLocation` to represent the subcarrier distance from the reference point. Therefore, a 7.5kHz shift can be applied, for example, by adding 7.5kHz to the subcarrier frequency value indicated by the subcarrier index indicated by `txDirectCurrentLocation`. The new DC position can be indicated by the value obtained after applying the shift (in the case of `shift7dot5kHz`). Otherwise, the 7.5kHz shift is not applied. The `txDirectCurrentLocation` field indicates the uplink Tx DC position of the carrier. The `txDirectCurrentLocation` field is set to a value between 0 and 3299 to indicate the subcarrier index within the carrier corresponding to the parameter set of the corresponding uplink BWP. A value of 3300 indicates "outside the carrier," while a value of 3301 indicates "undetermined location within the carrier." For example, each UE can be configured with up to approximately four BWPs for each CC. Thus, the UE can report up to approximately four `UplinkTxDirectCurrentBWP` fields for each CC, where each `UplinkTxDirectCurrentBWP` field can correspond to one BWP for a given CC.

[0154] Accordingly, in some instances, the UE may include a frequency band report that uses the UplinkTxDirectCurrentList IE to include DC locations that vary depending on the configured frequency band or BWP (e.g., four BWPs). For example, the above relates to... Figure 7 , 8 The DC location report in methods 700, 800, 900, 1400, and / or 1500 described in 9, 14, and / or 15 can indicate the DC location using the UplinkTxDirectCurrentList IE. Additionally, in some instances, the UE can transmit the DC location report based on BWP configuration, BWP handover, BWP reconfiguration, and / or serving cell configuration by transmitting an RRCReconfigurationComplete message.

[0155] Information and signals can be represented using any of a wide variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or light particles, or any combination thereof.

[0156] The various illustrative blocks and modules described herein can be implemented or executed using a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but in alternatives, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors working in conjunction with a DSP core, or any other such configuration).

[0157] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations fall within the scope of this disclosure and the appended claims. For example, due to the nature of software, the above-described functions can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Features implementing the functions can also be physically located in various locations, including being distributed such that different parts of the function are implemented at different physical locations. Additionally, as used herein (including in the claims), the use of "or" in an enumeration of items (e.g., an enumeration of items accompanied by phrases such as "at least one of" or "one or more of") indicates an inclusive enumeration, such that an enumeration such as [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0158] As will be appreciated by those skilled in the art by this time, and depending on the specific application at hand, many modifications, substitutions, and variations can be made to the materials, apparatus, configuration, and methods of use of the devices disclosed herein without departing from the spirit and scope of this disclosure. Therefore, the scope of this disclosure should not be limited to the specific embodiments explained and described herein (as they are merely examples), but should be fully equivalent to the appended claims and their functional equivalents.

Claims

1. A method for wireless communication, comprising: The wireless communication device receives a carrier aggregation (CA) configuration, which configures the wireless communication device for CA with multiple component carriers (CCs). The wireless communication device determines a single DC location for the bandwidth portion BWP set associated with the plurality of CCs based on the CA configuration; as well as The wireless communication device transmits a report including an indication of the location of the individual DC for the BWP set.

2. The method of claim 1, wherein the report further includes one or more BWP indexes that identify the BWP set.

3. The method of claim 1, further comprising: The wireless communication device receives a BWP configuration, which configures the wireless communication device to have the BWP set.

4. The method of claim 1, wherein the determination includes determining a resource block (RB) comprising a single DC location for a BWP in the BWP set, and wherein the transmission includes transmitting the report comprising information associated with the determined RB.

5. The method of claim 1, wherein the determination includes determining one or more subcarriers overlapping with a single DC location for a BWP in the BWP set, and wherein the transmission includes transmitting the report including subcarrier offset information of the determined one or more subcarriers.

6. The method of claim 1, further comprising: The wireless communication device and network entity communicate a phase tracking reference signal (PTRS) based on the report configuration.

7. The method of claim 6, further comprising: The wireless communication device receives a resource element (RE) mapping from the network entity in response to the report for conveying the PTRS.

8. The method of claim 6, further comprising: The wireless communication device determines the resource element (RE) mapping for communicating the PTRS based on the single DC location. The transmission mentioned therein includes the transmission of the report comprising the determined RE mapping.

9. The method of claim 6, wherein the single DC location is associated with the transmitter of the wireless communication device, and wherein the communication comprises: The PTRS is transmitted from the wireless communication device to the network entity.

10. The method of claim 6, wherein the single DC location is associated with a receiver of the wireless communication device, and wherein the communication comprises: The PTRS is received by the wireless communication device from the network entity.

11. The method of claim 1, wherein the plurality of CCs are in-band CCs.

12. A first wireless communication device, comprising: Memory; transceiver; as well as A processor that communicates with the memory and the transceiver, wherein the first wireless communication device is configured to: Receive carrier aggregation (CA) configuration, the CA configuration configuring the first wireless communication device for CA with multiple component carriers (CC); The location of a single DC-DC converter for the bandwidth portion BWP set associated with the plurality of CCs is determined based on the CA configuration. as well as The transmission includes a report indicating the location of the individual DC for the BWP set.

13. The first wireless communication device of claim 12, wherein the first wireless communication device is configured to determine the location of the individual DC for a set of bandwidth portion BWPs associated with the plurality of CCs.

14. The first wireless communication device of claim 13, wherein the report further includes a BWP index identifying the BWP set.

15. The first wireless communication device of claim 13, wherein the first wireless communication device is further configured to: Receive BWP configuration, the BWP configuration configuring the first wireless communication device to have the BWP set.

16. The first wireless communication device of claim 13, wherein the first wireless communication device is configured to determine the single DC location including determining a resource block RB comprising a single DC location for a BWP in the BWP set, and wherein the first wireless communication device is configured to transmit the report including transmitting the report comprising information associated with the determined RB.

17. The first wireless communication device of claim 13, wherein the first wireless communication device is configured to determine the single DC location including the first wireless communication device being configured to determine one or more subcarriers overlapping with the single DC location of a BWP in the BWP set, and the first wireless communication device is configured to transmit the report including the first wireless communication device being configured to transmit the report including subcarrier offset information of the determined one or more subcarriers.

18. The first wireless communication device of claim 12, wherein the first wireless communication device is further configured to: The network entity communicates the Phase Tracking Reference Signal (PTRS) based on the configuration of the report.

19. The first wireless communication device of claim 18, wherein the first wireless communication device is further configured to: In response to the report, the network entity receives a resource element (RE) mapping for conveying the PTRS.

20. The first wireless communication device of claim 18, wherein the first wireless communication device is further configured to: Based on the single DC location, determine the resource element RE mapping used to communicate the PTRS. The first wireless communication device is configured to transmit the report, which includes the first wireless communication device being configured to transmit the report including the determined RE mapping.

21. The first wireless communication device of claim 18, wherein the single DC location is associated with a transmitter of the first wireless communication device, and wherein the first wireless communication device is configured to transmit the PTRS comprising: The first wireless communication device is configured to transmit the PTRS to the network entity.

22. The first wireless communication device of claim 18, wherein the single DC location is associated with a receiver of the first wireless communication device, and wherein the first wireless communication device is further configured to transmit the PTRS including: The first wireless communication device is further configured to receive the PTRS from the network entity.

23. The first wireless communication device of claim 12, wherein the plurality of CCs are in-band CCs.

24. A non-transitory computer-readable medium having program code recorded thereon, wherein the program code includes instructions executable by a processor of a first wireless communication device to cause the first wireless communication device to perform the following operations: Receive carrier aggregation (CA) configuration, the CA configuration configuring the first wireless communication device for CA with multiple component carriers (CC); The location of a single DC-DC converter for the bandwidth portion BWP set associated with the plurality of CCs is determined based on the CA configuration; and The transmission includes a report indicating the location of the individual DC for the BWP set.

25. The non-transient computer-readable medium of claim 24, wherein the code for enabling the first wireless communication device to determine the single DC location includes code for enabling the first wireless communication device to determine the single DC location for a set of bandwidth portions (BWPs) associated with the plurality of CCs.

26. The non-transient computer-readable medium of claim 25, wherein the report further includes a BWP index identifying the BWP set.

27. A first wireless communication device, comprising: A means for receiving a carrier aggregation (CA) configuration, the CA configuration configuring the first wireless communication device for a CA having multiple component carriers (CCs); A means for determining a single DC location for a set of bandwidth portions (BWPs) associated with the plurality of CCs based on the CA configuration; as well as A means for transmitting a report including an indication of the location of a single DC for the BWP set.

28. The first wireless communication device of claim 27, wherein the means for determining the single DC location includes means for determining the single DC location for a set of bandwidth portions (BWPs) associated with the plurality of CCs.

29. The first wireless communication device of claim 27, wherein the report further includes a BWP index identifying the BWP set.

Images