Uplink reference signal technology for non-codebook based wireless communications

Abstract

Methods, systems, and apparatus for wireless communications are described for systems that utilize resource bandwidth within one or more bandwidth parts (BWPs). Such resource bandwidth can be configured within one or more BWPs to support relatively fast switching and allow for enhanced flexibility for communications within the BWPs. Within the one or more BWPs, downlink reference signal resources of a first resource bandwidth can be associated with one or more uplink resources of a second resource bandwidth, and precoding for uplink communications in the one or more uplink resources can be calculated based on the associated downlink reference signal resources. Additionally or alternatively, the beam used for uplink communications can be provided to the UE in transmission control information (TCI). Furthermore, in some cases, multiple disjoint subsets of uplink frequency resources within the resource bandwidth can use different beams based on an indication provided in the TCI.

Description

[0001] Cross-references

[0002] This patent application claims the benefit of Greek Provisional Patent Application No. 20200100320, filed by ABDELGHAFFAR et al. on June 9, 2020, entitled “UPLINK REFERENCE SIGNAL TECHNIQUES FOR NON-CODEBOOK-BASED WIRELESS COMMUNICATIONS,” which is assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0003] The following relates generally to wireless communications, and more particularly to uplink reference signal techniques for non-codebook based wireless communications.

[0004] background

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and the like. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems), and fifth generation (5G) systems, which may be referred to as new radio (NR) systems. These systems may employ various technologies, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each base station or network access node simultaneously supporting communication with multiple communication devices, which may be further referred to as user equipment (UE).

[0006] Some wireless communication systems may include communication devices (such as UEs and base stations) that can support duplex communication (such as half-duplex and full-duplex). The UEs and base stations may also support various bandwidth parts (BWPs) for half-duplex and full-duplex communication. In some cases, the UEs and base stations may also experience latency associated with duplex communication due to switching BWPs. As demands for communication efficiency increase, it may be desirable for UEs and base stations to provide improvements to BWP operation to support duplex communication with enhanced reliability and reduced latency.

[0007] Overview

[0008] Various aspects of the described techniques involve configuring a communication device, such as a user equipment (UE), to support duplex communication on one or more resource bandwidths within one or more bandwidth parts (BWPs) of a total available channel bandwidth. A BWP can be a portion of a radio frequency spectrum band that a UE can use for downlink or uplink communication, or both. In some cases, the UE can be configured with one or more resource bandwidths within a BWP, where downlink reference signal resources of a first resource bandwidth can be associated with one or more uplink reference signal resources of one or more different resource bandwidths. The UE can receive a downlink reference signal (e.g., a channel state information reference signal (CSI-RS)) in the first resource bandwidth and calculate precoding parameters for an uplink reference signal (e.g., a sounding reference signal (SRS)) in a first uplink reference resource of a second resource bandwidth. In some cases, uplink communications in the second resource bandwidth can be transmitted using a spatial domain transmit filter indicated to the UE in transmission control information (TCI). As a result, the described techniques can include features for improving resource bandwidth and BWP operation when determining precoding for uplink communications at the UE, and in some examples can promote high reliability and low latency duplex communication, among other benefits.

[0009] A method for wireless communication at a UE is described. The method may include: measuring a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station; calculating, based on the measurement, precoding parameters for an uplink reference signal to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from uplink frequency domain resources of the first resource bandwidth; and transmitting the uplink reference signal in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion using the calculated precoding parameters.

[0010] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: measure a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station; calculate, based on the measurement, precoding parameters for uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from the uplink frequency domain resources of the first resource bandwidth; and transmit the uplink reference signal in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion using the calculated precoding parameters.

[0011] Another apparatus for wireless communication at a UE is described. The apparatus may include means for measuring a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station; calculating, based on the measurement, precoding parameters for an uplink reference signal to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from uplink frequency domain resources of the first resource bandwidth; and transmitting the uplink reference signal in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion using the calculated precoding parameters.

[0012] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: measure a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station; calculate, based on the measurement, precoding parameters for uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from the uplink frequency domain resources of the first resource bandwidth; and transmit the uplink reference signal in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion using the calculated precoding parameters.

[0013] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the measuring may further include operations, features, means, or instructions for measuring downlink reference signals in contiguous or non-contiguous frequency domain resources within the first resource bandwidth. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the one or more reference signal resource sets completely or partially overlap with the frequency domain resources of the downlink reference signal. Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for transmitting uplink shared channel communications associated with the uplink reference signal in the second resource bandwidth.

[0014] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: receiving an uplink grant from a base station, the uplink grant including an indication of one or more reference signal resource sets in a second resource bandwidth, an indication of an index value associated with the second resource bandwidth, and uplink shared channel information about the second resource bandwidth. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the indication of the one or more reference signal resource sets indicates SRS resources defined within the second resource bandwidth. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, a plurality of uplink reference signal resource sets within the second resource bandwidth are indicated by the uplink grant, and wherein the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

[0015] Some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: receiving an uplink grant from a base station, the uplink grant including an indication of one or more reference signal resource sets in a second resource bandwidth, an indication of a first index value associated with the second resource bandwidth, and uplink shared channel information about a third resource bandwidth different from the second resource bandwidth. In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the uplink grant provides a first index value associated with the second resource bandwidth for the one or more reference signal resource sets and a second index value associated with the third resource bandwidth. In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the first index value is mapped to one or more reference signal resource sets of the second resource bandwidth. In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the uplink shared channel communication and the uplink reference signal have frequency domain resources that are fully or partially overlapping. In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the second resource bandwidth and the third resource bandwidth are in a same bandwidth portion of the channel bandwidth.

[0016] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, a plurality of uplink reference signal resource sets within the second resource bandwidth are indicated by an uplink grant, and wherein the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the uplink grant provides separate resource bandwidth indices for uplink shared channel communication and uplink reference signals.

[0017] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, an uplink grant includes a separate indication for each separate resource bandwidth index, or maps to an index value that is configured to provide separate resource bandwidth indices for uplink shared channel communication and uplink reference signals. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, an uplink grant provides separate reference signal resources for each of one or more reference signal resource sets. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, an uplink grant includes a separate indication for each reference signal resource set, or maps to an index value that is configured to provide different combinations of reference signal resources for each uplink reference signal resource set.

[0018] A method for wireless communication at a UE is described. The method may include: receiving uplink transmission control information from a base station, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication based on a downlink reference signal received from the base station; and transmitting the first uplink reference signal and the first uplink shared channel communication using the calculated precoding parameters and associated spatial domain parameters.

[0019] A device for wireless communication at a UE is described. The device may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the device to perform the following operations: receive uplink transmission control information from a base station, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; calculate precoding parameters for the first uplink reference signal and the first uplink shared channel communication based on a downlink reference signal received from the base station; and transmit the first uplink reference signal and the first uplink shared channel communication using the calculated precoding parameters and associated spatial domain parameters.

[0020] Another apparatus for wireless communication at a UE is described. The apparatus may include instructions for: receiving uplink transmission control information from a base station, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication based on a downlink reference signal received from the base station; and transmitting the first uplink reference signal and the first uplink shared channel communication using the calculated precoding parameters and associated spatial domain parameters.

[0021] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: receive uplink transmission control information from a base station, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; calculate precoding parameters for the first uplink reference signal and the first uplink shared channel communication based on a downlink reference signal received from the base station; and transmit the first uplink reference signal and the first uplink shared channel communication using the calculated precoding parameters and associated spatial domain parameters.

[0022] In some examples of the methods, devices, and non-transitory computer-readable media described herein, uplink transmission control information indicates a first spatial domain parameter set for a first uplink reference signal and a second spatial domain parameter set for a first uplink shared channel communication, and these spatial domain parameter sets are provided as separate indications for each spatial domain parameter set, or are provided in index values ​​mapped to a configured table indicating different spatial domain parameter sets.

[0023] Some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: resources for the first uplink shared channel communication occupy non-contiguous frequency resources within the first resource bandwidth or the second resource bandwidth, and separate spatial domain parameters are used for different portions of the non-contiguous frequency resources. In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the downlink reference signal occupies contiguous or non-contiguous frequency domain resources within the first resource bandwidth. In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the frequency domain resources of the first uplink reference signal and the downlink reference signal completely or partially overlap.

[0024] A method for wireless communication at a base station is described. The method may include: configuring a UE to transmit uplink communications based on precoding parameters calculated from measurements of downlink reference signals in a first resource bandwidth of a first bandwidth portion of a channel bandwidth, wherein the uplink communications include uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from uplink frequency domain resources of the first resource bandwidth; transmitting the downlink reference signal to the UE in the first resource bandwidth; and receiving the uplink reference signal from the UE in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion.

[0025] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: configure a UE to transmit uplink communications based on precoding parameters calculated based on measurements of downlink reference signals in a first resource bandwidth of a first bandwidth portion of a channel bandwidth, wherein the uplink communications include uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources that are different from uplink frequency domain resources of the first resource bandwidth; transmit the downlink reference signal to the UE in the first resource bandwidth; and receive the uplink reference signal from the UE in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion.

[0026] Another apparatus for wireless communication at a base station is described. The apparatus may include means for: configuring a UE to transmit uplink communications based on precoding parameters calculated from measurements of downlink reference signals in a first resource bandwidth of a first bandwidth portion of a channel bandwidth, wherein the uplink communications include uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from uplink frequency domain resources of the first resource bandwidth; transmitting the downlink reference signal to the UE in the first resource bandwidth; and receiving the uplink reference signal from the UE in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion.

[0027] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to: configure a UE to transmit uplink communications based on precoding parameters calculated from measurements of downlink reference signals in a first resource bandwidth of a first bandwidth portion of a channel bandwidth, wherein the uplink communications include uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from uplink frequency domain resources of the first resource bandwidth; transmit the downlink reference signal to the UE in the first resource bandwidth; and receive the uplink reference signal from the UE in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion.

[0028] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, a downlink reference signal is transmitted in contiguous or non-contiguous frequency domain resources within a first resource bandwidth. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the one or more reference signal resource sets completely or partially overlap with the frequency domain resources of the downlink reference signal. Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: receiving an uplink shared channel communication associated with the uplink reference signal from the UE in a second resource bandwidth.

[0029] Some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: transmitting an uplink grant to a UE, the uplink grant including an indication of one or more reference signal resource sets in a second resource bandwidth, an indication of an index value associated with the second resource bandwidth, and uplink shared channel information about the second resource bandwidth. In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the indication of the one or more reference signal resource sets indicates SRS resources defined within the second resource bandwidth. In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, several uplink reference signal resource sets within the second resource bandwidth are indicated by the uplink grant, and wherein the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

[0030] Some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: transmitting an uplink grant to a UE, the uplink grant including an indication of one or more reference signal resource sets in a second resource bandwidth, an indication of a first index value associated with the second resource bandwidth, and uplink shared channel information about a third resource bandwidth different from the second resource bandwidth. In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the uplink grant provides a first index value associated with the second resource bandwidth for the one or more reference signal resource sets and a second index value associated with the third resource bandwidth. In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the first index value is mapped to one or more reference signal resource sets of the second resource bandwidth. In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the uplink shared channel communication and the uplink reference signal have frequency domain resources that are fully or partially overlapping. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the second resource bandwidth and the third resource bandwidth are in a same bandwidth portion of the channel bandwidth.

[0031] In some examples of the methods, devices, and non-transitory computer-readable media described herein, a plurality of uplink reference signal resource sets within the second resource bandwidth are indicated by an uplink grant, and wherein the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

[0032] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, an uplink grant provides separate resource bandwidth indices for uplink shared channel communications and uplink reference signals. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, an uplink grant includes a separate indication for each separate resource bandwidth index, or maps to an index value of a configured table that provides separate resource bandwidth indices for uplink shared channel communications and uplink reference signals. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, an uplink grant provides separate reference signal resources for each of one or more reference signal resource sets. In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, an uplink grant includes a separate indication for each reference signal resource set, or maps to an index value of a configured table that provides different combinations of reference signal resources for each uplink reference signal resource set.

[0033] A method for wireless communication at a base station is described. The method may include: transmitting uplink transmission control information to a UE, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; transmitting a downlink reference signal to the UE for use in calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication; and receiving the first uplink reference signal and the first uplink shared channel communication using the associated spatial domain parameters.

[0034] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: transmit uplink transmission control information to a UE, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; transmit a downlink reference signal to the UE for use in calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication; and receive the first uplink reference signal and the first uplink shared channel communication using the associated spatial domain parameters.

[0035] Another apparatus for wireless communication at a base station is described. The apparatus may include means for: transmitting uplink transmission control information to a UE, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; transmitting a downlink reference signal to the UE for use in calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication; and receiving the first uplink reference signal and the first uplink shared channel communication using the associated spatial domain parameters.

[0036] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to: transmit uplink transmission control information to a UE, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; transmit a downlink reference signal to the UE for use in calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication; and receive the first uplink reference signal and the first uplink shared channel communication using the associated spatial domain parameters.

[0037] In some examples of the methods, devices, and non-transitory computer-readable media described herein, uplink transmission control information indicates a first spatial domain parameter set for a first uplink reference signal and a second spatial domain parameter set for a first uplink shared channel communication, the spatial domain parameter sets being provided as separate indications for each spatial domain parameter set or provided in index values ​​mapped to a configured table indicating different spatial domain parameter sets. In some examples of the methods, devices, and non-transitory computer-readable media described herein, resources used for the first uplink shared channel communication occupy non-contiguous frequency resources within a first resource bandwidth or a second resource bandwidth, and separate spatial domain parameters are used for different portions of the non-contiguous frequency resources. In some examples of the methods, devices, and non-transitory computer-readable media described herein, a downlink reference signal occupies contiguous or non-contiguous frequency domain resources within the first resource bandwidth. In some examples of the methods, devices, and non-transitory computer-readable media described herein, the frequency domain resources of the first uplink reference signal and the downlink reference signal fully or partially overlap. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1

[0014] An example of a wireless communication system supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure is illustrated.

[0040] Figure 2 An example of a portion of a wireless communication system supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure is illustrated.

[0041] Figures 3A to 3C

[0014] An example of a wireless communication system supporting bandwidth fractions and resource-bandwidth switching in wireless communications in accordance with aspects of the present disclosure is illustrated.

[0042] Figure 4A and 4B

[0014] An example of a full-duplex configuration supporting bandwidth fractions and resource-bandwidth switching in wireless communications in accordance with aspects of the present disclosure is illustrated.

[0043] Figure 5

[0014] Illustrated are examples of radio frequency subband configurations that support uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure.

[0044] Figure 6

[0014] Examples of non-codebook precoding determination supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure are illustrated.

[0045] Figure 7Examples of BWP and resource bandwidth configurations supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure are illustrated.

[0046] Figure 8 Further examples of BWP and resource bandwidth configurations supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure are illustrated.

[0047] Figure 9 Additional examples of BWP and resource bandwidth configurations supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure are illustrated.

[0048] Figure 10 and 11 A block diagram of a device supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure is shown.

[0049] Figure 12 A block diagram of a communications manager supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure is shown.

[0050] Figure 13

[0014] Diagrams are shown of systems including devices supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure.

[0051] Figure 14 and 15 A block diagram of a device supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure is shown.

[0052] Figure 16 A block diagram of a communications manager supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure is shown.

[0053] Figure 17

[0014] Diagrams are shown of systems including devices supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure.

[0054] Figures 18 to 23 A flow chart illustrating a method of supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure is shown.

[0055] Detailed description

[0056] For example, some wireless communication systems may provide communication between devices, such as user equipment (UE) and base stations. The UE and base station may support duplex communication, such as half-duplex communication and full-duplex communication. The UE and base station may also support various bandwidth parts (BWPs) for half-duplex communication and full-duplex communication, where each BWP is a portion of the available bandwidth for wireless communication. Each BWP may be a contiguous set of resources in the frequency domain configured via radio resource control (RRC) signaling, and therefore BWP switching is a relatively slow process associated with RRC reconfiguration of the BWP, which may take a relatively long time to complete (e.g., due to signaling associated with RRC configuration / reconfiguration and associated communication between the UE and base station).

[0057] According to the techniques discussed herein, a UE may be configured with a BWP comprising one or more resource bandwidths within one or more BWPs. Each resource bandwidth may span the entire BWP or a portion of a BWP. Furthermore, within a configured BWP, the resource bandwidths may be non-contiguous in the frequency domain. Resource bandwidths may also be referred to as sub-bandwidth portions or sub-BWPs. In some cases, a UE may be configured to receive a BWP configuration that defines a set of resource bandwidths for one or more BWPs. Each resource bandwidth may define time and frequency resources for one or more BWPs allocated for downlink or uplink communications. A BWP configuration may include downlink reference signal resources (e.g., for a channel state information reference signal (CSI-RS)) for a first resource bandwidth, and the UE may measure the CSI-RS and use these measurements to calculate precoding to be applied to one or more uplink communications in a second resource bandwidth. Such UE calculation of precoding may provide digital beamforming for uplink transmissions, which may increase the likelihood of successful reception of uplink communications at the base station. The situation in which the UE performs such precoding calculations may be referred to as non-codebook-based uplink communication (e.g., non-codebook PUSCH, rather than codebook-based PUSCH in which the UE is provided with a precoding matrix indicator (PMI) that maps to a precoding parameter set in the codebook). Additionally, in some cases, the base station may provide information related to the beam to be used for uplink communication (such as by providing uplink transmission control information (TCI) that provides information related to the spatial domain transmission filter for the SRS resource set and the scheduled PUSCH). In some cases, the resource bandwidth may include disjoint subsets of frequency resources, and each different disjoint subset may have a different beam (e.g., a different TCI).

[0058] Various aspects of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages, among other things. Techniques employed by a UE can provide benefits and enhancements to the UE's operation for determining precoding when operating using a resource bandwidth within a BWP. Furthermore, downlink reference signal resources within a resource bandwidth can be used that may be different from uplink resources within a different resource bandwidth. In some other examples, configuring a UE to support an initial resource bandwidth for random access communications can provide improvements in power consumption, spectral efficiency, and in some examples, can promote high reliability and low latency duplex communications, among other benefits.

[0059] Various aspects of the present disclosure are initially described in the context of wireless communication systems. Various examples of resource bandwidths with reference signal resources and UE precoding determination are subsequently discussed. Various aspects of the present disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow charts related to uplink reference signal techniques for non-codebook-based wireless communication.

[0060] Figure 1 An example of a wireless communication system 100 supporting uplink reference signal technology for non-codebook based wireless communication according to various aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0061] Base stations 105 may be dispersed throughout a geographic area to form wireless communication system 100 and may be different forms of devices or devices with different capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which UEs 115 and base stations 105 may establish one or more communication links 125. Coverage area 110 may be an example of a geographic area over which base stations 105 and UEs 115 may support signal communication according to one or more radio access technologies.

[0062] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be different forms of devices or devices with different capabilities. Figure 11. The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relays, integrated access and backhaul (IAB) nodes, or other network equipment), such as Figure 1 As shown in .

[0063] Each base station 105 can communicate with the core network 130, with each other, or both. For example, the base stations 105 can interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 can communicate with each other directly (e.g., directly between the base stations 105), indirectly (e.g., via the core network 130), or both directly and indirectly over the backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul links 120 can be or include one or more wireless links. One or more of the base stations 105 described herein may include or may be referred to by one of ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a Home Node B, a Home eNode B, or other suitable terminology.

[0064] The UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, where "device" may also be referred to as a unit, a station, a terminal, or a client, etc. The UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, the UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects such as appliances or vehicles, meters, etc. The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 As shown in .

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

[0066] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid for discovery by a UE 115. A carrier may operate in a standalone mode in which initial acquisition and connection may be performed by a UE 115 via the carrier, or a carrier may operate in a non-standalone mode in which the connection is anchored using a different carrier (e.g., a different carrier of the same or different radio access technology).

[0067] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in FDD mode), or may be configured to carry downlink and uplink communications (e.g., in TDD mode). A carrier may be associated with a specific bandwidth of radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)) of a carrier for a particular radio access technology. Devices of the wireless communication system 100 (e.g., the base station 105, the UE 115, or both) may have hardware configurations that support communications on a specific carrier bandwidth, or may be configurable to support communications on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or a UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0068] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using a multicarrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may include one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the code rate of the modulation scheme, or both). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further improve the data rate or data integrity of communications with UE 115.

[0069] One or more parameter designs for a carrier may be supported, where the parameter designs may include subcarrier spacing (Δf) and cyclic prefix. A carrier may be divided into one or more BWPs with the same or different parameter designs. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications for the UE 115 may be limited to the one or more active BWPs.

[0070] The wireless communication system 100 can support duplex communication, such as half-duplex and full-duplex. The wireless communication system 100 can support duplex communication over various BWPs. The base station 105 and the UE 115 may experience interference issues due to duplex communication, which may affect the reliability and latency of the wireless communication system 100. Due to BWP switching performed by the base station 105 and the UE 115, the base station 105 and the UE 115 may experience delays in duplex communication. As demands for communication efficiency increase, it may be desirable for the wireless communication system 100 to provide improvements to BWP operation to support duplex communication with high reliability and low latency, among other examples.

[0071] UE 115 may receive a BWP configuration that defines a set of resource bandwidths for the one or more BWPs. Each resource bandwidth (or sub-BWP) may define time and frequency resources associated with the one or more BWPs allocated for downlink or uplink communication. Thus, the resource bandwidths may accommodate disjoint bandwidth allocations for duplex communication, such as full-duplex communication supporting both downlink and uplink communication. UE 115 may determine that at least one resource bandwidth in the set is a primary resource bandwidth (also referred to as a default resource bandwidth) for downlink or uplink communication, or both.

[0072] For example, if the UE 115 does not know which resource bandwidth to use for the BWP (e.g., the base station 105 does not explicitly signal the UE 115 to use a specific resource bandwidth), the primary resource bandwidth can be used as the default resource bandwidth for the UE 115. The primary resource bandwidth can also provide flexibility for the UE 115 when switching BWPs (where the primary resource bandwidth becomes the active resource bandwidth) unless the UE 115 is explicitly signaled a specific resource bandwidth. As a result, the described techniques may include features for improving BWP operation when switching BWPs and, in some examples, may promote high reliability and low latency duplex communication on different BWPs in the wireless communication system 100, among other benefits.

[0073] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, which can be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, where Δf max It can represent the maximum supported subcarrier spacing, and N f The maximum supported discrete Fourier transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0074] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of code element periods (e.g., depending on the length of the cyclic prefix added before each code element period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-time slots containing one or more code elements. Excluding the cyclic prefix, each code element period may contain one or more (e.g., N f ) sampling period. The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band. A subframe, slot, minislot, or symbol may be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0075] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for physical control channels may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of UEs 115 may monitor or search the control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0076] Each base station 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hotspots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with a base station 105 (e.g., on a carrier) and may be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other) used to distinguish between adjacent cells. In some examples, a cell may also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) on which the logical communication entity operates. The scope of such a cell may range from a smaller area (e.g., a structure, a subset of structures) to a larger area depending on various factors (such as the capabilities of the base station 105). For example, a cell may be or include a building, a subset of buildings, or an external space between or overlapping geographic coverage areas 110, among other examples.

[0077] Macro cells generally cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to UEs 115 that have service subscriptions with a network provider that supports the macro cells. Small cells may be associated with lower-power base stations 105 (compared to macro cells) and may operate in the same or different frequency bands (e.g., licensed or unlicensed) as the macro cells. Small cells may provide unrestricted access to UEs 115 that have service subscriptions with the network provider, or they may provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a closed subscriber group (CSG) or UEs 115 associated with users in a home or office). A base station 105 may support one or more cells and may also support communication across one or more cells using one or more component carriers. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

[0078] In some examples, base stations 105 can be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but the different geographic coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communication system 100 can include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0079] The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timing, and transmissions from different base stations 105 may not be aligned in time in some examples. The techniques described herein may be used for either synchronous or asynchronous operation.

[0080] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that incorporate sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents it to a person interacting with the application. Some UEs 115 may be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wilderness survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0081] Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power saving techniques for UEs 115 include entering a power-saving deep sleep mode when not engaged in active communication, operating over a limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a guard band of a carrier, or outside a carrier.

[0082] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. The UE 115 can be designed to support ultra-reliable, low-latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication and can be supported by one or more mission-critical services such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably herein.

[0083] In some examples, UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of base station 105 or otherwise unable to receive transmissions from base station 105. In some examples, groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, in which each UE 115 transmits to every other UE 115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving base station 105.

[0084] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, the vehicles in the V2X system can use vehicle-to-network (V2N) communication to communicate with roadside infrastructure (such as roadside units), with the network, or with both, via one or more network nodes (e.g., base station 105).

[0085] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and the EPC or 5GC may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) that manages access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) that routes packets or interconnects to external networks. The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets may be delivered through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the network operator IP service 150. Operator IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0086] Some network devices (such as base stations 105) may include subcomponents, such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., base station 105).

[0087] The wireless communication system 100 can operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally speaking, the 300 MHz to 3 GHz region is referred to as the ultra-high frequency (UHF) region or the decimeter band because the wavelengths range from approximately 1 decimeter to 1 meter long. UHF waves can be blocked or redirected by buildings and environmental features, but these waves can penetrate various structures sufficiently for macrocells to provide service to UEs 115 located indoors. Transmissions using UHF waves can be associated with smaller antennas and a shorter range (e.g., less than 100 kilometers) compared to transmissions using the lower frequencies and longer wavelengths in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0088] The wireless communication system 100 may also operate in a super high frequency (SHF) region using a frequency band from 3 GHz to 30 GHz (also known as a centimeter band) or in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also known as a millimeter band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be smaller and more closely spaced than the UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and a shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the use of frequency bands specified across these frequency regions may vary by country or regulatory agency.

[0089] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ licensed assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band, such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed radio frequency spectrum band, devices (such as base stations 105 and UEs 115) may employ carrier sensing for conflict detection and avoidance. In some examples, operations in the unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in the licensed band. Operations in the unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others.

[0090] The base station 105 or UE 115 may be equipped with multiple antennas that can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having several rows and columns of antenna ports that the base station 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0091] The base station 105 or the UE 115 can use MIMO communication to exploit multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such a technique may be referred to as spatial multiplexing. For example, a transmitting device may transmit multiple signals via different antennas or different antenna combinations. Similarly, a receiving device may receive multiple signals via different antennas or different antenna combinations. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0092] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., base station 105, UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals communicated via antenna elements of an antenna array so that some signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements can include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with that device. The adjustments associated with each antenna element can be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0093] The base station 105 or the UE 115 may use beam sweeping techniques as part of a beamforming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the base station 105 in different directions. For example, the base station 105 may transmit signals according to different sets of beamforming weights associated with different transmission directions. The transmissions in different beam directions may be used (e.g., by a transmitting device (such as the base station 105) or a receiving device (such as the UE 115)) to identify a beam direction for later transmission or reception by the base station 105.

[0094] Some signals, such as data signals associated with a particular recipient device, may be transmitted by base station 105 in a single beam direction, e.g., a direction associated with a recipient device, such as UE 115. In some examples, a beam direction associated with transmissions along a single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0095] In some examples, transmission by a device (e.g., by a base station 105 or a UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from the base station 105 to the UE 115). The UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. The base station 105 may transmit reference signals that may be precoded or unprecoded (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)). The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques to transmit signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0096] A receiving device (e.g., UE 115) may attempt multiple receive configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiving device may attempt multiple receive directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array (e.g., different directional listening weight sets), or processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receive configurations or receive directions. In some examples, the receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving data signals). The single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0097] The wireless communication system 100 can be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication of the bearer or packet data convergence protocol (PDCP) layer can be IP-based. The radio link control (RLC) layer can perform packet segmentation and reassembly to communicate on the logical channel. The media access control (MAC) layer can perform priority handling and multiplex the logical channel into the transport channel. The MAC layer can also use error detection technology, error correction technology, or both to support retransmission of the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer can provide the establishment, configuration and maintenance of the RRC connection of the radio bearer that supports user plane data between the UE 115 and the base station 105 or the core network 130. In the physical layer, the transport channel can be mapped to the physical channel.

[0098] UE 115 and base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. Hybrid Automatic Repeat Request (HARQ) feedback is a technique for increasing the likelihood that data is correctly received on communication link 125. HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve MAC layer throughput in poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device may support simultaneous slot HARQ feedback, wherein the device may provide HARQ feedback in a particular time slot for data received in a previous symbol in that time slot. In other cases, the device may provide HARQ feedback in a subsequent time slot or based on some other time interval.

[0099] In some cases, communication between base station 105 and UE 115 can be duplex communication, in which UE 115 uses the same set of time and frequency resources to concurrently transmit and receive communications. As discussed herein, in some cases, one or more resource bandwidths can be configured in one or more BWPs to support relatively fast handovers and allow for enhanced flexibility for such duplex communication. In some cases, within one or more BWPs, downlink reference signal resources of a first resource bandwidth can be associated with one or more uplink resources of a second resource bandwidth, and precoding for uplink communication in the one or more uplink resources can be calculated based on the associated downlink reference signal resources. Additionally or alternatively, the beam used for uplink communication can be provided to the UE in a TCI. Furthermore, in some cases, multiple disjoint subsets of frequency resources within a resource bandwidth can use different beams based on an indication provided in the TCI.

[0100] Figure 2 An example of a wireless communication system 200 that supports uplink reference signal techniques for non-codebook-based wireless communication according to aspects of the present disclosure is illustrated. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. For example, the wireless communication system 200 can include a base station 105-a and a UE 115-a, which can be examples of base stations 105 and UE 115 as described herein. The wireless communication system 200 can support multiple radio access technologies, including 4G systems (such as LTE systems, LTE-A systems, or LTE-A Pro systems), and 5G systems (which can be referred to as NR systems).

[0101] The base station 105-a and the UE 115-a may be configured with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output communications, or beamforming, or any combination thereof. The antennas of the base station 105-a and the UE 115-a may be located within one or more antenna arrays or antenna panels that may support multiple-input multiple-output operations or transmit or receive beamforming. For example, the base station 105-a antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with the base station 105-a may be located at different geographical locations. The base station 105-a may have an antenna array having several rows and columns of antenna ports that the base station 105-a may use to support beamforming for communications with the UE 115-a. Similarly, the UE 115-a may have one or more antenna arrays that may support various multiple-input multiple-output or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via one or more antenna ports. Thus, the base station 105-a and the UE 115-a can be configured to support directional communication 205 using multiple antennas (e.g., via beamforming). In some examples, the base station 105-a or the UE 115-a can support duplex communication 210, such as half-duplex communication or full-duplex communication, or both, via carriers associated with multiple carrier bandwidths over the directional communication 205.

[0102] In some cases, the base station 105-a and the UE 115-a may support sub-band half-duplex communication or sub-band full-duplex communication. The base station 105-a and the UE 115-a may support duplex communication using TDD technology or FDD technology. In some cases, the base station 105-a and the UE 115-a may support TDD operation and FDD operation in an unpaired spectrum or a paired spectrum. The unpaired spectrum provides a single sub-band or a single frequency band for both downlink communication and uplink communication. The paired spectrum provides different sub-bands or frequency bands for downlink communication and uplink communication. For example, the wireless communication system 200 may have a radio frequency spectrum block in a lower frequency band and an associated radio frequency spectrum block in a higher frequency band.

[0103] A frequency band arrangement having one frequency band for uplink communications and one frequency band for downlink communications may be referred to as a paired spectrum. UE 115-a may be configured to operate on a portion of a radio frequency spectrum band (e.g., bandwidth). For example, UE 115-a may be configured to operate on one or more BWPs 215. In some cases, when base station 105-a and UE 115-a are configured with multiple antenna panels (one of which may be dedicated for downlink communications and another antenna panel may be dedicated for uplink communications in an unpaired spectrum or a paired spectrum), base station 105-a and UE 115-a may experience self-interference when communicating on one or more BWPs 215. Self-interference may be the result of using multiple antenna panels for both uplink and downlink communications on one or more BWPs 215 simultaneously (e.g., in full-duplex communication).

[0104] UE 115-a may be configured to receive a BWP configuration that defines a set of resource bandwidths for one or more BWPs (BWPs 215). Each resource bandwidth may define time and frequency resources for one or more BWPs 215 (e.g., a first BWP 220 and a second BWP 225) allocated for duplex communication 210. In some cases, one or more of BWPs 215 may be configured with multiple resource bandwidths, and downlink reference signal resources of a first resource bandwidth may be associated with one or more uplink resources of a second resource bandwidth, and precoding for uplink communications in the one or more uplink resources may be calculated based on the associated downlink reference signal resources. Such techniques may provide enhanced communication reliability by allowing precoding to be determined at UE 115-a for uplink communications in different resource bandwidths that at least partially overlap in the frequency domain with a downlink reference signal.

[0105] Additionally or alternatively, in some cases, UE 115-a may be provided with uplink TCI associated with one or more uplink transmit beams (e.g., uplink 'spatialrelationinfo'). In some previous deployments, for non-codebook based uplink communications, UE 115-a may not be expected to be configured with spatial relation information associated with an uplink beam and associated CSI-RS resources in an SRS resource set (e.g., because the SRS resource set is configured with 'associatedCSI-RS' to calculate precoding to be used for the SRS). In such deployments, UE 115-a may not be individually configured with an uplink beam for each SRS resource. In accordance with various aspects discussed herein, the transmitted uplink TCI may include an indication of a source reference signal to indicate an uplink transmit beam for a target uplink reference signal or channel. Such an indication may provide an indication of one or more spatial domain transmit filters for the SRS resource set(s) and the scheduled PUSCH. In the case of disjoint PUSCHs on two (or more) subbands, each PUSCH may have its own uplink TCI state. Such techniques may further provide enhanced communication reliability by allowing the use of spatial relationship information for one or more uplink beams, which may increase the likelihood of successfully receiving and decoding the associated uplink communications.

[0106] Figure 3A An example of a wireless communication system 300-a supporting uplink reference signal technology for non-codebook based wireless communication according to various aspects of the present disclosure is illustrated. In some examples, the wireless communication system 300-a can implement aspects of the wireless communication system 100 or 200. For example, the wireless communication system 300-a can support duplex communication on resource bandwidth in a BWP. Figure 3A In the example of FIG. 3 , base stations 105 - b and 105 - c may be configured to support full-duplex communication in wireless communication system 300 - a. For example, base stations 105 - b and 105 - c may support full-duplex communication with UEs 115 - b and 115 - c. Base stations 105 - b and 105 - c and UEs 115 - b and 115 - c may be examples of base stations 105 and UEs 115 described herein.

[0107] UE 115-b, 115-c can be configured to operate in half-duplex mode or full-duplex mode. In half-duplex mode, UE 115-b, 115-c can be configured to receive downlink communications from base station 105-b, 105-c, or transmit uplink communications to base station 105-b, 105-c. In other words, in half-duplex mode, UE 115-b, 115-c may not be able to jointly receive downlink communications and transmit uplink communications using the same frequency resources during the same time period. However, in full-duplex mode, UE 115-b, 115-c can be configured to simultaneously receive downlink communications from base station 105-b, 105-c and transmit uplink communications to base station 105-b, 105-c on the same set of frequency resources during the same time period. Base station 105-b, 105-c can use one or more directional beams to provide downlink communications. Likewise, UEs 115-b, 115-c may provide uplink communications using one or more directional beams.

[0108] refer to Figure 3A , the base stations 105-b, 105-c may operate in full-duplex mode, while the UEs 115-b, 115-c may operate in half-duplex mode. In some situations, one or more of the base stations 105-b, 105-c and the UEs 115-b, 115-c may experience interference in the wireless communication system 300-a. For example, the base station 105-b may experience self-interference from downlink communications to uplink communications. As an example, the base station 105-b may transmit downlink communications 305 to the UE 115-b using at least one antenna panel of the base station 105-b and receive uplink communications 310 from the UE 115-c using another antenna panel of the base station 105-b. This may result in self-interference at the base station 105-b due to, for example, simultaneously transmitting downlink communications 305 using at least one antenna panel of the base station 105-b and receiving uplink communications 310 from the UE 115-c using another antenna panel of the base station 105-b.

[0109] Base station 105-b may experience some interfering communications 315 from base station 105-c, which may be related to downlink communications from base station 105-c to UE 115-b or downlink communications from base station 105-c to UE 115-c. Similarly, UE 115-b may experience some interfering communications 315 from UE 115-c, which may be related to uplink communications from UE 115-c to base station 105-c. Additionally or alternatively, base station 105-c may experience some interfering communications 315 from UE 115-c, which may be related to uplink communications 310 from UE 115-c to base station 105-b. To mitigate self-interference at UE 115-b, UE 115-b (or any other UE 115) may use resource bandwidth of the BWP allocated for uplink communications or downlink communications, or both.

[0110] For example, a UE 115-b, 115-c may be configured to receive a BWP configuration that defines a set of resource bandwidths for one or more BWPs. Each resource bandwidth may define time and frequency resources for one or more BWPs allocated for duplex communication. Furthermore, in some cases, to help reduce or eliminate interference, a UE 115-b, 115-c may be configured to receive a BWP configuration that defines a set of resource bandwidths for one or more BWPs.

[0111] UE 115-b, 115-c can identify at least one downlink reference signal (e.g., CSI-RS) resource associated with one or more groups of uplink reference signal (e.g., SRS) resource sets, one or more uplink data channel (e.g., PUSCH) resources, or a combination thereof.

[0112] The UEs 115-b, 115-c may transmit non-codebook based uplink communications by calculating precoding parameters based on reference signal measurements in downlink reference signal resources and using the precoding parameters for uplink communications. The base stations 105-b, 105-c may schedule, and the UEs 115-b, 115-c may perform, non-codebook duplex communications that account for the BWP and resource bandwidth for the BWP, as described herein.

[0113] Figure 3B An example of a wireless communication system 300-b according to aspects of the present disclosure is illustrated. In some examples, the wireless communication system 300-b can implement aspects of the wireless communication system 100 or 200. For example, the wireless communication system 300-b can support half-duplex communication or full-duplex communication. Figure 3BIn the example of FIG. 3 , base stations 105 - b and 105 - c may be configured to support full-duplex communication in wireless communication system 300 - b. For example, base stations 105 - b and 105 - c may support full-duplex communication with UEs 115 - b and 115 - c. Base stations 105 - b and 105 - c and UEs 115 - b and 115 - c may be examples of base stations 105 and UEs 115 described herein.

[0114] exist Figure 3B In the example of , UE 115-b, 115-c may be configured to operate in full-duplex mode. In full-duplex mode, UE 115-b, 115-c may be configured to concurrently receive downlink communications from base stations 105-b, 105-c and transmit uplink communications to base stations 105-b, 105-c. Similarly, base stations 105-b, 105-c may also operate in full-duplex mode. Base stations 105-b, 105-c may use one or more directional beams to provide downlink communications. Similarly, UE 115-b, 115-c may use one or more directional beams to provide uplink communications. In some cases, one or more of base stations 105-b, 105-c and UE 115-b, 115-c may experience self-interference or other interference in the wireless communication system 300-b. For example, base station 115-b may experience self-interference from downlink communications to uplink communications.

[0115] As an example, base station 105-b may transmit downlink communications 305 to UE 115-b, which UE 115-b may receive via at least one antenna panel of UE 115-b. UE 115-b may also transmit uplink communications 310 to base station 105-b via another antenna panel of UE 115-b. This may result in self-interference at UE 115-b due to, for example, simultaneously receiving downlink communications 305 using at least one antenna panel of UE 115-b and transmitting uplink communications 310 using another antenna panel of UE 115-b. Similarly, base station 105-c may transmit downlink communications 305 to UE 115-c, and UE 115-c may transmit uplink communications (not shown) to base station 105-c. This may result in self-interference at UE 115-c. Base station 105-b or UE 115-b, or both, may also experience some interfering communications 315 from base station 105-c or UE 115-c, or both. Interfering communications 315 may be associated with downlink communications 305 from base station 105-c to UE 115-c, or uplink communications (not shown) from UE 115-c to base station 105-c, or both. To reduce or eliminate self-interference at UE 115-b, UE 115-c (or any other UE 115), one or more resource bandwidths for the BWP allocated for uplink communications or downlink communications, or both, may be used for communication.

[0116] In addition, in some cases, to help reduce or eliminate interference, the UE 115-b, 115-c can be configured to receive a BWP configuration that defines a set of resource bandwidths for one or more BWPs. The UE 115-b, 115-c can identify at least one downlink reference signal (e.g., CSI-RS) resource associated with one or more sets of uplink reference signal (e.g., SRS) resources, one or more uplink data channel (e.g., PUSCH) resources, or a combination thereof. The UE 115-b, 115-c can transmit non-codebook-based uplink communications by calculating precoding parameters based on reference signal measurements in the downlink reference signal resources and using the precoding parameters for the uplink communications. The base station 105-b, 105-c can schedule, and the UE 115-b, 115-c can perform, non-codebook duplex communications that take into account the BWP and the resource bandwidth for the BWP, as described herein.

[0117] Figure 3C An example of a wireless communication system 300-c according to aspects of the present disclosure is illustrated. In some examples, the wireless communication system 300-c can implement aspects of the wireless communication system 100 or 200. For example, the wireless communication system 300-c can support half-duplex communication or full-duplex communication. Figure 3C In the example of FIG. 3 , base stations 105 - b and 105 - c may be configured to support full-duplex communication in wireless communication system 300 - b. For example, base stations 105 - b and 105 - c may support full-duplex communication with UEs 115 - b and 115 - c. Base stations 105 - b and 105 - c and UEs 115 - b and 115 - c may be examples of base stations 105 and UEs 115 described herein.

[0118] exist Figure 3C In the example of , UE 115-b, 115-c may be configured to operate in full-duplex mode with multiple transmit receive points (multi-TRP). In full-duplex mode, UE 115-b, 115-c may be configured to concurrently receive downlink communications from base stations 105-b, 105-c and transmit uplink communications to base stations 105-b, 105-c. Similarly, base stations 105-b, 105-c may also operate in full-duplex mode. Base stations 105-b, 105-c may use one or more directional beams to provide downlink communications. Similarly, UE 115-b, 115-c may use one or more directional beams to provide uplink communications. In some cases, one or more of base stations 105-b, 105-c and UE 115-b, 115-c may experience self-interference or other interference in the wireless communication system 300-b. For example, base station 115 - b may experience self-interference from downlink communications to uplink communications.

[0119] As an example, UE 115-b may receive downlink communications 305 from base station 105-c using one TRP of UE 115-b and transmit uplink communications 310 to base station 105-b using another TRP of UE 115. The reception of downlink communications 305 and the transmission of uplink communications 310 may occur simultaneously. This may cause self-interference at UE 115-b. Similarly, base station 105-c may transmit downlink communications 305 to UE 115-b using one TRP of base station 105-c and transmit downlink communications 305 to UE 115-c using another TRP of base station 105-c. To reduce or eliminate self-interference at UE 115-b, UE 115-c (or any other UE 115), one or more resource bandwidths for one or more BWPs may be allocated for uplink communications or downlink communications, or both.

[0120] In addition, in some cases, to help reduce or eliminate interference, the UE 115-b, 115-c can be configured to receive a BWP configuration that defines a set of resource bandwidths for one or more BWPs. The UE 115-b, 115-c can identify at least one downlink reference signal (e.g., CSI-RS) resource associated with one or more sets of uplink reference signal (e.g., SRS) resources, one or more uplink data channel (e.g., PUSCH) resources, or a combination thereof. The UE 115-b, 115-c can transmit non-codebook-based uplink communications by calculating precoding parameters based on reference signal measurements in the downlink reference signal resources and using the precoding parameters for the uplink communications. The base station 105-b, 105-c can schedule, and the UE 115-b, 115-c can perform, non-codebook duplex communications that take into account the BWP and the resource bandwidth for the BWP, as described herein.

[0121] Figure 4A An example of a full-duplex communication configuration 400-a supporting uplink reference signal techniques for non-codebook-based wireless communications in accordance with aspects of the present disclosure is illustrated. In some examples, the full-duplex communication configuration 400-a can implement aspects of the wireless communication system 100, 200, or 300. For example, the configuration 400-a can be based on a full-duplex configuration provided by the base station 105 and implemented by the base station 105 or the UE 115, or both. In some examples, the base station 105 or the UE 115, or both, can support in-band full-duplex (IBFD) operation. In accordance with IBFD operation, the base station 105 and the UE 115 can simultaneously transmit and receive communications in the same frequency band, thereby increasing the throughput of the wireless communication system (e.g., the wireless communication system 100, 200, or 300).

[0122] For example, the base station 105 and the UE 115 can transmit and receive communications (e.g., downlink communications 405, uplink communications 410) on the same time and frequency resources (such as symbols, mini-slots, subframes, frames, subcarriers, carriers, etc.). Thus, the downlink communications 405 and the uplink communications 410 can share the same IBFD time and frequency resources. The base station 105 can provide downlink communications 405 using one or more directional beams via one or more antenna panels. Similarly, the UE 115 can provide uplink communications 410 using one or more directional beams via one or more antenna panels. In some examples, there may be a complete overlap 415 between the IBFD time and frequency resources associated with the downlink communications 405 and the uplink communications 410. In some other examples, there may be a partial overlap 420 between the IBFD time and frequency resources associated with the downlink communications 405 and the uplink communications 410.

[0123] According to aspects of the present disclosure, a UE 115 operating in full-duplex mode (such as the configuration illustrated by configuration 400-a) may determine one or more resource bandwidths for one or more BWPs allocated for uplink communications or downlink communications, or both. One or more downlink reference signal resources may be associated with one or more uplink reference signal resource sets and / or one or more PUSCH resources, wherein precoding parameters for uplink communications using the associated uplink resources are determined based on measurements of the downlink reference signal resources.

[0124] Figure 4B An example of a configuration 400-b supporting bandwidth fractions and resource bandwidth switching in accordance with aspects of the present disclosure is illustrated. Configuration 400-b can implement aspects of wireless communication systems 100, 200, or 300. For example, configuration 400-b can be based on a full-duplex configuration provided by base station 105 and implemented by base station 105 or UE 115, or both. Base station 105 can support full-duplex communication, including transmitting downlink communications 405 and receiving uplink communications 410 using one or more directional beams. Similarly, UE 115 can support full-duplex communication, including transmitting uplink communications 410 in an uplink frequency band and receiving downlink communications 405 in a downlink frequency band using one or more directional beams via one or more antenna panels. In some examples, base station 105 or UE 115, or both, can support FDD operating resources associated with full-duplex communication.

[0125] For example, the base station 105 and the UE 115 can transmit and receive communications (e.g., downlink communications 405, uplink communications 410) on the same time resources (e.g., symbols, mini-slots, subframes, frames) but different frequency resources (such as subcarriers, carriers). In this way, the downlink communications 405 and the uplink communications 410 can be separated in the frequency domain. Additionally, in some examples, there can be a guard band 425 in the frequency domain between the downlink communications 405 in the downlink frequency band and the uplink communications 410 in the uplink frequency band. The guard band 425 can be an unused portion of the radio frequency spectrum between at least two radio frequency spectrum sub-bands or radio frequency spectrum bands for reducing interference between, for example, the downlink communications 405 in the downlink frequency band and the uplink communications 410 in the uplink frequency band.

[0126] According to aspects of the present disclosure, a UE 115 operating in full-duplex mode (such as in the configuration illustrated by configuration 400-b) may determine one or more resource bandwidths for one or more BWPs allocated for uplink communications or downlink communications, or both. One or more downlink reference signal resources may be associated with one or more uplink reference signal resource sets and / or one or more PUSCH resources, wherein precoding parameters for uplink communications using the associated uplink resources are determined based on measurements of the downlink reference signal resources.

[0127] Figure 5 An example of a radio frequency subband configuration 500 supporting uplink reference signal technology for non-codebook based wireless communication according to various aspects of the present disclosure is illustrated. In some examples, the radio frequency subband configuration 500 can implement aspects of the wireless communication system 100, 200, or 300. For example, the radio frequency subband configuration 500 can support half-duplex communication or full-duplex communication. The configuration 500 can be based on configuration performed by a base station (e.g., base station 105 as discussed herein) or a UE (e.g., UE 115 as discussed herein) and implemented by the UE, and can promote fast switching in duplex communication by supporting resource bandwidth and BWP operation. The configuration 500 can also be based on configuration performed by a base station or a UE and implemented by the UE to promote high reliability and low latency wireless communication by providing an indication identifying one or more BWPs and one or more resource bandwidths, as well as other benefits.

[0128] A UE may communicate (e.g., receive downlink communications or transmit uplink communications, or both) with a base station, another UE, or both over one or more BWPs. For example, a BWP 505 may be configured for uplink communications between the UE and the base station, or may be configured for downlink communications between the UE and the base station. The UE may identify a set of resource bandwidths (e.g., time and frequency resources) for the BWP based on a BWP configuration received from the base station (e.g., via RRC signaling). For example, for a BWP, the UE may identify a resource bandwidth 510 associated with the BWP 505, a resource bandwidth 515 associated with the BWP 505, a resource bandwidth 520 associated with the BWP 505, and / or a resource bandwidth 525 associated with the BWP 505 based on the BWP configuration. In some examples, the UE may receive separate BWP configurations for uplink and downlink BWPs 505.

[0129] The UE may determine that at least one resource bandwidth in the resource bandwidth set includes downlink reference signal resources (e.g., CSI-RS resources), and at least one resource bandwidth includes one or more uplink reference signal (e.g., SRS) resource sets, one or more uplink data transmission (e.g., PUSCH) resources, or a combination thereof. In some examples, the UE may receive an indication of the BWP 505 configuration from the base station (e.g., via one or more information elements provided in RRC signaling). In some other examples, the UE may receive a DCI message or MAC-CE including an indication of the BWP 505 configuration.

[0130] Each resource bandwidth may span the entire BWP 505 or a portion of the BWP 505. Furthermore, within a configured BWP 505, resource bandwidths may be non-contiguous in the frequency domain, such as illustrated for resource bandwidth 525. In some cases, downlink reference signal resources within a first resource bandwidth may be used to measure downlink reference signals (e.g., CSI-RS). The measurements may be used to calculate precoding parameters for one or more associated uplink communications (e.g., PUSCH or SRS communications). In some cases, uplink communications may span the same or different frequency resource sets as the downlink reference signal frequency resources. In some cases, different frequency resource sets may at least partially overlap with downlink reference signal frequency resources. Thus, downlink reference signals may be measured at a UE for non-codebook communication purposes.

[0131] Figure 6 An example of a non-codebook precoding determination 600 supporting uplink reference signal techniques for non-codebook-based wireless communications according to aspects of the present disclosure is illustrated. In some examples, the non-codebook precoding determination 600 can implement aspects of wireless communication systems 100, 200, or 300. In this example, the CSI-RS resources 605 can be configured within the resource bandwidth of the BWP (e.g., in RRC signaling). In addition, the UE can be configured for non-codebook uplink communications.

[0132] In such an example, the UE may be configured with one SRS resource set 610 with "Use" set to "Non-Codebook." For example, the SRS resource set 610 may be configured with one associated non-zero power (NZP) CSI-RS resource corresponding to the CSI-RS resource 605 (e.g., via the RRC parameter 'associatedCSI-RS'). The UE may calculate a precoder for transmission on the SRS resources within the SRS resource set 610 based on measurements of the associated NZP CSI-RS resource 605. In some cases, up to four SRS resources within the set may be configured for the UE, and the SRS may be transmitted using a precoder calculated for each SRS resource within the SRS resource set 610 based on measurements of the CSI-RS resource 605. The base station may receive the precoded SRS and select one or more SRS resources to indicate in downlink control information (DCI) 615, which provides information to the UE regarding uplink grants (i.e., in UL DCI) for PUSCH scheduling. Subsequently, the UE may transmit uplink data 620 in an uplink communication (e.g., in a PUSCH). In some cases, the uplink DCI 615 may include an SRS resource indicator (SRI) indicating SRS resources, where the number of SRS resources indicated determines the rank of the uplink data 620 transmission (e.g., the SRI may indicate SRS resources 0 and 2, and thus the PUSCH has two layers, and each layer is transmitted using the same precoding and beam as those used to transmit the SRS in the corresponding SRS resources 610). The SRI indicated in a time slot (e.g., in time slot n) is associated with the most recent transmission of the SRS resource(s) identified by the SRI, where the SRS transmission precedes the PDCCH carrying the SRI. According to various aspects discussed herein, CSI-RS resources in a first resource bandwidth may be associated with one or more SRS resource sets of a second resource bandwidth.

[0133] Figure 7An example of a BWP and resource bandwidth configuration 700 supporting uplink reference signal techniques for non-codebook-based wireless communications according to various aspects of the present disclosure is illustrated. In some examples, the BWP and resource bandwidth configuration 700 can implement aspects of wireless communication systems 100, 200, or 300. For example, a base station or UE, or both, as described herein, can support various types of frequency ranges, such as the sub-6 GHz range (also referred to as FR1) and the millimeter wave (mmW) range (also referred to as FR2 or FR4). In some examples, when operating in one or more radio frequency spectrum subbands, the base station or UE, or both, can support multiplexing operation on time and frequency resources. The multiplexing operation can be FDD operation and TDD operation. The resource bandwidth configuration 700 can reduce or mitigate self-interference by isolating the antenna panels of the base station or UE, or both. Such isolation can provide improvements in reducing noise experienced at the antenna panels (e.g., signal-to-noise ratio (SNR) > 50 dB or SNR > 40 dB for sub-band full duplex).

[0134] exist Figure 7 In an example, the base station or the UE or both may support FDD operation and TDD operation on time and frequency resources for downlink communications (e.g., downlink control 705, downlink data 710) and uplink communications (e.g., uplink control 715, uplink data 720) in an unpaired spectrum. One or more downlink frequency bands and one or more uplink frequency bands may be in different parts of the radio frequency spectrum. In some examples, there may be a guard band between the downlink frequency band and the uplink frequency band. The base station may provide downlink communications (e.g., downlink control 705, downlink data 710) using one or more directional beams via one or more antenna panels in accordance with the resource bandwidth configuration 700 (e.g., TDD and FDD). The UE may also provide uplink communications (e.g., uplink control 715, uplink data 720) using one or more directional beams via one or more antenna panels in accordance with the resource bandwidth configuration 700 (e.g., TDD and FDD). Thus, the base station or the UE or both may support FDD and TDD operations in unpaired spectrum for duplex communication between the base station and the UE.

[0135] Resource bandwidth configuration 700 can mitigate self-interference at a base station or a UE or both. For example, a base station or a UE or both can be configured with at least two separate antenna panels for simultaneous transmission and reception operations. For example, a base station can be configured with at least two separate antenna panels for simultaneous transmission and reception operations. Similarly, a UE can be configured with at least two separate antenna panels for simultaneous transmission and reception operations. Reference Figure 7In some examples, one of the two antenna panels may be configured for downlink transmission at both edges of the resource bandwidth configuration 700, while the other of the two antenna panels may be configured for uplink reception in the middle of the resource bandwidth configuration 700.

[0136] The base station or the UE or both may support time-domain windowed overlap and add (WOLA) to reduce the adjacent channel leakage rate (ACLR) of the downlink signal or the uplink signal. The base station or the UE or both may use an analog low-pass filter to improve the analog-to-digital converter (ADC) dynamic range. The base station or the UE or both may improve the automatic gain control (AGC) state to improve the noise figure (NF). In some examples, the digital integrated circuit (IC) of the ACLR leakage may be higher than 20 dB (i.e., ACLR leakage>20 dB). The base station or the UE or both may use a nonlinear model for each transmitter-receiver pair.

[0137] According to aspects of the present disclosure, a UE operating in full-duplex mode, such as that illustrated by resource bandwidth configuration 700, may determine CRS-RS resources 725 within a first resource bandwidth that may be associated with one or more sets of SRS resources 730 in a second resource bandwidth different from the first resource bandwidth. Thus, a base station may schedule duplex communications that account for a BWP and a resource bandwidth for the BWP using non-codebook uplink communications as described herein, and the UE may perform these duplex communications.

[0138] return Figure 2 UE 115-a may switch BWPs when communicating with base station 105-a. For example, UE 115-a may switch from BWP 220 to BWP 225 for communication with base station 105-a. In some examples, UE 115-a may switch BWPs based on a message received from base station 105-a. In some examples, the message may be a DCI message, which may include a DCI command for UE 115-a to switch BWPs and a BWP identifier that may indicate to UE 115-a the BWP to switch to. The message may identify a specific BWP that may be activated by the BWP identifier (e.g., which may also be referred to as a BWP indicator). In some other examples, the message may be an RRC message, a MAC-CE, or the like.

[0139] In some cases, the bandwidth within a BWP 215 (e.g., BWP 220 and / or BWP 225) may be affected by the downlink frequency band, guard band, or uplink frequency band, or any combination thereof. Accordingly, the base station 105-a may configure the UE 115-a with one or more resource bandwidths corresponding to the time and frequency resources associated with the BWP 215 (e.g., BWP 220 and / or BWP 225) allocated for downlink or uplink communication. Thus, the resource bandwidth may accommodate disjoint bandwidth allocations for duplex communication, such as full-duplex communication supporting both downlink and uplink communication. In some cases, the base station 105-a and the UE 115-a may support a joint indication of switching BWPs and resource bandwidths.

[0140] The UE 115-a may be configured to receive a BWP configuration from the base station 105-a that defines a set of resource bandwidths for one or more BWPs 215. Each resource bandwidth may define time and frequency resources for one or more BWPs allocated for downlink or uplink communications. The BWP configuration may also provide a set of CSI-RS resources and SRS resources for use in non-codebook communications as discussed herein.

[0141] Figure 8 An example BWP and resource bandwidth configuration 800 supporting uplink reference signal techniques for non-codebook-based wireless communications according to aspects of the present disclosure is illustrated. In some examples, the BWP and resource bandwidth configuration 800 can implement aspects of wireless communication systems 100, 200, or 300. In each of the example BWP and resource bandwidth configurations 800, a base station can provide downlink communications (e.g., downlink control 805, downlink data 810) using one or more directional beams via one or more antenna panels, and a UE can also provide uplink communications (e.g., uplink control 815, uplink data 820) using one or more directional beams via one or more antenna panels. Thus, the base station or the UE, or both, can support FDD and TDD operations in unpaired spectrum for duplex communication between the base station and the UE.

[0142] Downlink resources of one or more resource bandwidths may include CSI-RS resources 825. In some cases, in a first resource bandwidth (e.g., Figure 8 A single CSI-RS resource 825 at a resource bandwidth X in the example of FIG. 8 may be coupled to a second resource bandwidth (eg, Figure 8800 - a) and 800 - c) . The CSI-RS resources 825 may be associated with one or more SRS resource sets with "non-codebook" usage at resource bandwidth Y (in the example of FIG. 1 ). The CSI-RS resources 825 may be allocated with contiguous or non-contiguous frequency-domain resource blocks (RBs). For example, in the first example 800 - a, the CSI-RS resource 825 allocation spans non-contiguous RBs within resource bandwidth X, while in the second example 800 - b and the third example 800 - c, the CSI-RS resource 825 allocation spans contiguous RBs within resource bandwidth X. The CSI-RS resources 825 and the SRS resource set(s) 830 may partially or completely overlap in the frequency domain, such as illustrated as completely overlapping in the first example 800 - a and partially overlapping in the second example 800 - b and the third example 800 - c. The association of the SRS resource set(s) 830 and the CSI-RS resources 825 may apply to periodic, semi-persistent, or aperiodic CSI-RS, as well as to periodic, semi-persistent, or aperiodic SRS.

[0143] As reference Figure 6 As discussed, the base station may provide SRI to the UE. In some cases, the PUSCH, the indicated SRS resource set(s) and / or the SRS resource(s) may be in the same resource bandwidth. In such cases, the uplink grant DCI may include SRI, a resource bandwidth index and PUSCH information, where the SRI may be used for the SRS resources defined within the resource bandwidth index. In the case where more than one SRS resource set 830 is defined within the resource bandwidth, the SRI bit field in the uplink grant DCI may indicate the same SRS resources for each SRS resource set 830. In other cases, the SRI bit field may have several bits that may be used to independently represent the SRS resources for each SRS resource set 830.

[0144] In some cases, the PUSCH and the indicated SRS resource set(s) and / or SRS resources may be in different resource bandwidths. In such cases, in addition to the SRS and PUSCH information, the uplink grant DCI may also include a resource bandwidth index value for the PUSCH and another resource bandwidth index value for the SRS resource set 830. In such cases, the SRI may be associated with the SRS resources defined within the resource bandwidth index. The PUSCH and SRS may have full or partial frequency domain overlap, and the resource bandwidths of the PUSCH and SRS may be within the same active BWP. In cases where more than one SRS resource set 830 is defined within a BPW, the SRI bit field in the uplink grant DCI may indicate the same SRS resources for each SRS resource set 830, or the SRI bit field may have a number of bits that can be used to independently represent the SRS resources for each SRS resource set 830.

[0145] In some cases, if separate resource bandwidth indices for PUSCH and SRS are required, the uplink grant DCI may include explicit bits for providing such indication (e.g., 2 bits for PUSCH resource bandwidth and 2 bits for SRS resource bandwidth), or N bits (e.g., N≥2) may be provided in the DCI to represent the code point of an RRC-configured table that jointly indicates the resource bandwidth for both SRS and PUSCH. In other cases, the DCI may include an SRI bit field having bits that independently represent the SRS resources for each SRS resource set. In such cases, N1+N2 bits may be provided in the DCI, where N1 bits represent the SRI for the first SRS resource set and N2 represent the SRI for the second SRS resource set. Alternatively, M bits may be provided in the DCI to represent the code point of an RRC-configured table that jointly indicates the SRI for each SRS resource set. Figure 9 Additional examples of CSI-RS resources and associated SRS resource sets are illustrated in .

[0146] Figure 9 An example BWP and resource bandwidth configuration 900 supporting uplink reference signal techniques for non-codebook-based wireless communications according to aspects of the present disclosure is illustrated. In some examples, the BWP and resource bandwidth configuration 900 can implement aspects of wireless communication systems 100, 200, or 300. In each of the example BWP and resource bandwidth configurations 900, a base station can provide downlink communications (e.g., downlink control 905, downlink data 910) using one or more directional beams via one or more antenna panels, and a UE can also provide uplink communications (e.g., uplink control 915, uplink data 920) using one or more directional beams via one or more antenna panels. Thus, the base station or the UE, or both, can support FDD and TDD operations in unpaired spectrum for duplex communication between the base station and the UE.

[0147] exist Figure 9 In the example of FIG, the downlink resources of one or more resource bandwidths may include CSI-RS resources 925 and (all) SRS resource sets 930, similar to reference Figure 8As discussed. In the first example 900-a, the CSI-RS resource 925 may occupy an RB that completely overlaps with the SRS resource set 930. In this example, in the first time slot, the UE may measure the CSI-RS resource 925 in resource bandwidth X and determine the precoding for SRS transmission in the SRS resource set 930 in resource bandwidth Y in the second time slot. In this example, resource bandwidth X may be used in the third time slot, which may include downlink control information 905 that schedules a PUSCH using resource bandwidth Y and indicates an SRI for the PUSCH. For example, the UE may determine the precoding for the SRS resource set 930 in resource bandwidth Y in the first time slot. Figure 8 In this example, since the same resource bandwidth is used for SRS and PUSCH, the PUSCH in the upper and lower subbands can follow the SRS resource sets in the upper and lower subbands, and the SRI can indicate the same rank and SRS resources for each PUSCH, or can be separate for each PUSCH.

[0148] In the second example 900-b, the CSI-RS resources 925 may occupy RBs that partially overlap with the SRS resource set 930. In addition, the PUSCH may occupy RBs that partially overlap with the SRS resource set 930. In this example, in the first time slot, the UE may measure the CSI-RS resources 925 in resource bandwidth 1 and determine the precoding for SRS transmission in the SRS resource set 930 in resource bandwidth 1 in the second time slot. In this example, resource bandwidth 1 may be used in the third time slot, and the third time slot may include downlink control information 905 that schedules the PUSCH using resource bandwidth 3 and indicates the SRI for the PUSCH. For example, according to the reference Figure 8 In this example, the different resource bandwidths for SRS and PUSCH partially overlap, and the SRI of the SRS resource set of resource bandwidth 2 can be used to transmit PUSCH on resource bandwidth 3. It should be understood that Figure 8 and 9 The various examples provided in are provided for purposes of illustration and discussion, and numerous other examples of different resource bandwidths in duplex communications can use the described techniques.

[0149] Figure 10A block diagram 1000 of a device 1005 supporting uplink reference signal techniques for non-codebook based wireless communications according to aspects of the present disclosure is shown. The device 1005 may be an example of aspects of the UE 115 as described herein. The device 1005 may include a receiver 1010, a communication manager 1015, and a transmitter 1020. The device 1005 may also include one or more processors, a memory coupled to the one or more processors, and instructions stored in the memory that are executable by the one or more processors to enable the one or more processors to perform the non-codebook based wireless communications discussed herein. Each of these components may be in communication with each other (e.g., via one or more buses).

[0150] The receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to uplink reference signal technology for non-codebook based wireless communications, etc.). The information may be passed to other components of the device 1005. The receiver 1010 may be a reference signal. Figure 13 Examples of aspects of the described transceiver 1320. The receiver 1010 may utilize a single antenna or a collection of antennas.

[0151] The communication manager 1015 may measure a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth part of a channel bandwidth used for communication between a UE and a base station; calculate precoding parameters for an uplink reference signal to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth part based on the measurement, wherein the one or more reference signal resource sets include uplink frequency domain resources different from the uplink frequency domain resources of the first resource bandwidth; and transmit the uplink reference signal using the calculated precoding parameters in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth part.

[0152] The communication manager 1015 may also receive uplink transmission control information from the base station, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; calculate precoding parameters for the first uplink reference signal and the first uplink shared channel communication based on a downlink reference signal received from the base station; and transmit the first uplink reference signal and the first uplink shared channel communication using the calculated precoding parameters and associated spatial domain parameters. The communication manager 1015 may be an example of aspects of the communication manager 1310 as described herein.

[0153] The communication manager 1015 or its subcomponents may be implemented in hardware, in code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 1015 or its subcomponents may be performed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC), an FPGA or other programmable logic device designed to perform the functions described in this disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0154] The communication manager 1015 or its subcomponents can be physically located at various locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 1015 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 1015 or its subcomponents can be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0155] The transmitter 1020 may transmit signals generated by other components of the device 1005. In some examples, the transmitter 1020 may be co-located with the receiver 1010 in a transceiver module. For example, the transmitter 1020 may be a reference Figure 13 Examples of aspects of the described transceiver 1320. The transmitter 1020 may utilize a single antenna or a collection of antennas.

[0156] Figure 11A block diagram 1100 of a device 1105 supporting uplink reference signal techniques for non-codebook based wireless communications according to aspects of the present disclosure is shown. The device 1105 may be an example of aspects of the device 1005 or UE 115 as described herein. The device 1105 may include a receiver 1110, a communication manager 1115, and a transmitter 1140. The device 1105 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0157] The receiver 1110 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to uplink reference signal technology for non-codebook based wireless communications, etc.). The information may be passed to other components of the device 1105. The receiver 1110 may be a reference signal. Figure 13 Examples of aspects of the described transceiver 1320. The receiver 1110 may utilize a single antenna or a collection of antennas.

[0158] The communication manager 1115 may be an example of aspects of the communication manager 1015 as described herein. The communication manager 1115 may include a reference signal measurement manager 1120, a precoding manager 1125, an uplink transmission manager 1130, and a beam manager 1135. The communication manager 1115 may be an example of aspects of the communication manager 1310 as described herein.

[0159] In some cases, the reference signal measurement manager 1120 may measure a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between a UE and the base station. Based on the measurement, the precoding manager 1125 may calculate precoding parameters for uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from the uplink frequency domain resources of the first resource bandwidth. The uplink transmission manager 1130 may use the calculated precoding parameters to transmit the uplink reference signal in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion.

[0160] In some cases, the beam manager 1135 may receive uplink transmission control information from a base station, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion. The precoding manager 1125 may calculate precoding parameters for the first uplink reference signal and the first uplink shared channel communication based on a downlink reference signal received from the base station. The uplink transmission manager 1130 may transmit the first uplink reference signal and the first uplink shared channel communication using the calculated precoding parameters and associated spatial domain parameters.

[0161] The transmitter 1140 may transmit signals generated by other components of the device 1105. In some examples, the transmitter 1140 may be co-located with the receiver 1110 in a transceiver module. For example, the transmitter 1140 may be a reference Figure 13 Examples of aspects of the described transceiver 1320. The transmitter 1140 may utilize a single antenna or a collection of antennas.

[0162] In some cases, the reference signal measurement manager 1120, the precoding manager 1125, the uplink transmission manager 1130, and the beam manager 1135 can each be a processor (e.g., a transceiver processor, a radio processor, a transmitter processor, or a receiver processor) or at least a portion thereof. The processor can be coupled to a memory and execute instructions stored in the memory, which enable the processor to perform or facilitate the features of the reference signal measurement manager 1120, the precoding manager 1125, the uplink transmission manager 1130, and the beam manager 1135 as discussed herein. The transceiver processor can be co-located and / or in communication with the transceiver of the device (e.g., directing the operation of the transceiver). The radio processor can be co-located and / or in communication with the radio (e.g., NR radio, LTE radio, Wi-Fi radio) of the device (e.g., directing the operation of the radio). The transmitter processor can be co-located and / or in communication with the transmitter of the device (e.g., directing the operation of the transceiver). A receiver processor may be co-located with and / or in communication with a receiver of a device (eg, directing the operation of the receiver).

[0163] Figure 12A block diagram 1200 of a communication manager 1205 supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure is shown. The communication manager 1205 can be an example of aspects of the communication manager 1015, the communication manager 1115, or the communication manager 1310 described herein. The communication manager 1205 can include a reference signal measurement manager 1210, a precoding manager 1215, an uplink transmission manager 1220, an SRS resource set manager 1225, a resource bandwidth manager 1230, and a beam manager 1235. Each of these modules can communicate with each other directly or indirectly (e.g., via one or more buses).

[0164] Reference signal measurement manager 1210 may measure a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between a UE and the base station. In some examples, reference signal measurement manager 1210 may measure downlink reference signals in contiguous or non-contiguous frequency domain resources within the first resource bandwidth.

[0165] The precoding manager 1215 may calculate, based on the measurement, precoding parameters for an uplink reference signal to be transmitted in one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from the uplink frequency domain resources of the first resource bandwidth. In some examples, the precoding manager 1215 may calculate precoding parameters for the first uplink reference signal and the first uplink shared channel communication based on a downlink reference signal received from the base station.

[0166] The uplink transmission manager 1220 may transmit the uplink reference signal in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion using the calculated precoding parameters. In some examples, the uplink transmission manager 1220 may transmit the first uplink reference signal and the first uplink shared channel communication using the calculated precoding parameters and associated spatial domain parameters. In some cases, the uplink grant provides separate resource bandwidth indexes for the uplink shared channel communication and the uplink reference signal.

[0167] The beam manager 1235 may receive uplink transmission control information from the base station, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion. In some cases, the uplink transmission control information indicates a first set of spatial domain parameters for the first uplink reference signal and a second set of spatial domain parameters for the first uplink shared channel communication, the spatial domain parameter sets being provided as separate indications for each spatial domain parameter set or provided in index values ​​mapped to a configured table indicating different spatial domain parameter sets.

[0168] The SRS resource set manager 1225 may receive an uplink grant from the base station, the uplink grant including an indication of one or more reference signal resource sets in the second resource bandwidth, an indication of an index value associated with the second resource bandwidth, and uplink shared channel information regarding the second resource bandwidth. In some examples, the SRS resource set manager 1225 may receive an uplink grant from the base station, the uplink grant including an indication of one or more reference signal resource sets in the second resource bandwidth, an indication of a first index value associated with the second resource bandwidth, and uplink shared channel information regarding a third resource bandwidth different from the second resource bandwidth.

[0169] In some cases, the one or more reference signal resource sets completely or partially overlap with frequency domain resources for a downlink reference signal. In some cases, the indication of the one or more reference signal resource sets indicates SRS resources defined within the second resource bandwidth. In some cases, a set of uplink reference signal resource sets within the second resource bandwidth is indicated by an uplink grant, and wherein the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

[0170] In some cases, the uplink grant provides a first index value associated with the second resource bandwidth for the one or more reference signal resource sets and a second index value associated with the third resource bandwidth. In some cases, the first index value is mapped to the one or more reference signal resource sets of the second resource bandwidth. In some cases, the uplink grant provides separate reference signal resources for each of the one or more reference signal resource sets. In some cases, the uplink grant includes a separate indication for each reference signal resource set, or maps to an index value that is configured to provide a different combination of reference signal resources for each uplink reference signal resource set. In some cases, the frequency domain resources of the first uplink reference signal and the downlink reference signal fully or partially overlap.

[0171] The resource bandwidth manager 1230 may transmit uplink shared channel communications associated with uplink reference signals in a second resource bandwidth. In some examples, resources used for the first uplink shared channel communications occupy non-contiguous frequency resources within the first resource bandwidth or the second resource bandwidth, and separate spatial domain parameters are used for different portions of the non-contiguous frequency resources. In some cases, the uplink shared channel communications and the uplink reference signals have completely or partially overlapping frequency domain resources. In some cases, the second resource bandwidth and the third resource bandwidth are in the same bandwidth portion of the channel bandwidth. In some cases, the uplink grant includes a separate indication for each separate resource bandwidth index, or maps to an index value of a configured table that provides separate resource bandwidth indices for uplink shared channel communications and uplink reference signals. In some cases, the downlink reference signals occupy contiguous or non-contiguous frequency domain resources within the first resource bandwidth.

[0172] In some cases, the reference signal measurement manager 1210, the precoding manager 1215, the uplink transmission manager 1220, the SRS resource set manager 1225, the resource bandwidth manager 1230, and the beam manager 1235 can each be a processor (e.g., a transceiver processor, a radio processor, a transmitter processor, or a receiver processor) or at least a portion thereof. The processor can be coupled to a memory and execute instructions stored in the memory, which enable the processor to perform or facilitate the features of the reference signal measurement manager 1210, the precoding manager 1215, the uplink transmission manager 1220, the SRS resource set manager 1225, the resource bandwidth manager 1230, and the beam manager 1235 as discussed herein.

[0173] Figure 13A diagram of a system 1300 including a device 1305 supporting uplink reference signal technology for non-codebook based wireless communications according to various aspects of the present disclosure is shown. The device 1305 may be an example of, or include components of, the device 1005, device 1105, or UE 115 as described herein. The device 1305 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communication manager 1310, an I / O controller 1315, a transceiver 1320, an antenna 1325, a memory 1330, and a processor 1340. These components may be in electronic communication via one or more buses (e.g., bus 1345).

[0174] The communication manager 1310 may measure a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth part of a channel bandwidth used for communication between a UE and a base station; calculate precoding parameters for an uplink reference signal to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth part based on the measurement, wherein the one or more reference signal resource sets include uplink frequency domain resources different from the uplink frequency domain resources of the first resource bandwidth; and transmit the uplink reference signal using the calculated precoding parameters in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth part.

[0175] The communication manager 1310 may also receive uplink transmission control information from the base station, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth part of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth part; calculate precoding parameters for the first uplink reference signal and the first uplink shared channel communication based on a downlink reference signal received from the base station; and transmit the first uplink reference signal and the first uplink shared channel communication using the calculated precoding parameters and associated spatial domain parameters.

[0176] I / O controller 1315 can manage input and output signals for device 1305. I / O controller 1315 can also manage peripheral devices that are not integrated into device 1305. In some cases, I / O controller 1315 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1315 can utilize an operating system, such as or another known operating system. In other cases, I / O controller 1315 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 1315 may be implemented as part of a processor. In some cases, a user may interact with device 1305 via I / O controller 1315 or via hardware components controlled by I / O controller 1315.

[0177] The transceiver 1320 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1320 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1320 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and demodulate packets received from the antenna.

[0178] In some cases, the wireless device may include a single antenna 1325. However, in some cases, the device may have more than one antenna 1325, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0179] Memory 1330 may include RAM and ROM. Memory 1330 may store computer-readable, computer-executable code 1335 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 1330 may include, among other things, BIOS, which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0180] The processor 1340 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1340 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 1340. The processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1330) to cause the device 1305 to perform various functions (e.g., various functions or tasks supporting uplink reference signal technology for non-codebook-based wireless communications).

[0181] The code 1335 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1335 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, the code 1335 may not be directly executable by the processor 1340, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0182] Figure 14 A block diagram 1400 is shown of a device 1405 that supports uplink reference signal techniques for non-codebook based wireless communications in accordance with various aspects of the present disclosure. The device 1405 may be an example of various aspects of a base station 105 as described herein. The device 1405 may include a receiver 1410, a communication manager 1415, and a transmitter 1420. The device 1405 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0183] Receiver 1410 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to uplink reference signal technology for non-codebook based wireless communications, etc.). The information may be passed to other components of device 1405. Receiver 1410 may be a reference signal. Figure 17 Examples of aspects of the described transceiver 1720. The receiver 1410 may utilize a single antenna or a collection of antennas.

[0184] The communication manager 1415 may configure the UE to transmit uplink communications based on precoding parameters calculated based on measurements of a downlink reference signal in a first resource bandwidth in a first bandwidth portion of a channel bandwidth, wherein the uplink communications include an uplink reference signal to be transmitted in one or more reference signal resource sets in a second resource bandwidth in the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from the uplink frequency domain resources of the first resource bandwidth; transmit the downlink reference signal to the UE in the first resource bandwidth; and receive the uplink reference signal from the UE in each of the one or more reference signal resource sets in the second resource bandwidth in the first bandwidth portion.

[0185] The communication manager 1415 may also transmit uplink transmission control information to the UE, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; transmit a downlink reference signal to the UE for use in calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication; and receive the first uplink reference signal and the first uplink shared channel communication using the associated spatial domain parameters. The communication manager 1415 may be an example of aspects of the communication manager 1710 as described herein.

[0186] The communication manager 1415 or its subcomponents may be implemented in hardware, in code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 1415 or its subcomponents may be performed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC), an FPGA or other programmable logic device designed to perform the functions described in this disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0187] The communication manager 1415 or its subcomponents can be physically located at various locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 1415 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 1415 or its subcomponents can be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0188] The transmitter 1420 may transmit signals generated by other components of the device 1405. In some examples, the transmitter 1420 may be co-located with the receiver 1410 in a transceiver module. For example, the transmitter 1420 may be a reference Figure 17 Examples of aspects of the described transceiver 1720. The transmitter 1420 may utilize a single antenna or a collection of antennas.

[0189] Figure 15 A block diagram 1500 is shown of a device 1505 that supports uplink reference signal techniques for non-codebook based wireless communications in accordance with various aspects of the present disclosure. The device 1505 may be an example of aspects of the device 1405 or base station 105 as described herein. The device 1505 may include a receiver 1510, a communication manager 1515, and a transmitter 1545. The device 1505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0190] Receiver 1510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to uplink reference signal technology for non-codebook based wireless communications, etc.). The information may be passed to other components of device 1505. Receiver 1510 may be a reference signal. Figure 17 Examples of aspects of the described transceiver 1720. The receiver 1510 may utilize a single antenna or a collection of antennas.

[0191] The communication manager 1515 may be an example of aspects of the communication manager 1415 as described herein. The communication manager 1515 may include a configuration manager 1520, a reference signal manager 1525, a reference signal measurement manager 1530, a beam manager 1535, and an uplink transmission manager 1540. The communication manager 1515 may be an example of aspects of the communication manager 1710 as described herein.

[0192] In some cases, configuration manager 1520 may configure the UE to transmit uplink communications based on precoding parameters calculated based on measurements of downlink reference signals in a first resource bandwidth of a first bandwidth portion of a channel bandwidth, wherein the uplink communications include uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from the uplink frequency domain resources of the first resource bandwidth. Reference signal manager 1525 may transmit the downlink reference signal to the UE in the first resource bandwidth. Reference signal measurement manager 1530 may receive the uplink reference signal from the UE in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion.

[0193] In some cases, the beam manager 1535 may transmit uplink transmission control information to the UE, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion. The reference signal manager 1525 may transmit a downlink reference signal to the UE for use in calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication. The uplink transmission manager 1540 may receive the first uplink reference signal and the first uplink shared channel communication using the associated spatial domain parameters.

[0194] The transmitter 1545 can transmit signals generated by other components of the device 1505. In some examples, the transmitter 1545 can be co-located with the receiver 1510 in a transceiver module. For example, the transmitter 1545 can be a reference Figure 17 Examples of aspects of the described transceiver 1720. The transmitter 1545 may utilize a single antenna or a collection of antennas.

[0195] Figure 16A block diagram 1600 of a communication manager 1605 supporting uplink reference signal techniques for non-codebook based wireless communications in accordance with aspects of the present disclosure is shown. The communication manager 1605 may be an example of aspects of the communication manager 1415, the communication manager 1515, or the communication manager 1710 described herein. The communication manager 1605 may include a configuration manager 1610, a reference signal manager 1615, a reference signal measurement manager 1620, a resource bandwidth manager 1625, an SRS resource set manager 1630, a beam manager 1635, and an uplink transmission manager 1640. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0196] The configuration manager 1610 may configure the UE to transmit uplink communications based on precoding parameters calculated based on measurements of downlink reference signals in a first resource bandwidth in a first bandwidth portion of a channel bandwidth, wherein the uplink communications include uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth in the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources that are different from the uplink frequency domain resources of the first resource bandwidth.

[0197] Reference signal manager 1615 may transmit the downlink reference signal to the UE in the first resource bandwidth. In some examples, reference signal manager 1615 may transmit the downlink reference signal to the UE for use in calculating precoding parameters for a first uplink reference signal and a first uplink shared channel communication.

[0198] The reference signal measurement manager 1620 may receive the uplink reference signal from the UE in each of one or more reference signal resource sets in the second resource bandwidth of the first bandwidth part.

[0199] The beam manager 1635 may transmit uplink transmission control information to the UE, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communications between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion. In some cases, the uplink transmission control information indicates a first set of spatial domain parameters for the first uplink reference signal and a second set of spatial domain parameters for the first uplink shared channel communication, the spatial domain parameter sets being provided as separate indications for each spatial domain parameter set or in index values ​​mapped to a configured table indicating different spatial domain parameter sets. The uplink transmission manager 1640 may receive the first uplink reference signal and the first uplink shared channel communication using the associated spatial domain parameters.

[0200] Resource bandwidth manager 1625 may receive an uplink shared channel communication associated with an uplink reference signal from a UE in a second resource bandwidth. In some examples, resources used for the first uplink shared channel communication occupy non-contiguous frequency resources within the first resource bandwidth or the second resource bandwidth, and separate spatial domain parameters are used for different portions of the non-contiguous frequency resources. In some cases, the downlink reference signal is transmitted in contiguous or non-contiguous frequency domain resources within the first resource bandwidth. In some cases, the uplink shared channel communication and the uplink reference signal have completely or partially overlapping frequency domain resources. In some cases, the second resource bandwidth and the third resource bandwidth are in the same bandwidth portion of the channel bandwidth. In some cases, the uplink grant provides separate resource bandwidth indexes for the uplink shared channel communication and the uplink reference signal. In some cases, the uplink grant includes a separate indication for each separate resource bandwidth index, or maps to an index value that is mapped to a configured table that provides separate resource bandwidth indices for the uplink shared channel communication and the uplink reference signal. In some cases, the downlink reference signal occupies contiguous or non-contiguous frequency domain resources within the first resource bandwidth.

[0201] The SRS resource set manager 1630 may transmit an uplink grant to the UE, the uplink grant including an indication of one or more reference signal resource sets in the second resource bandwidth, an indication of an index value associated with the second resource bandwidth, and uplink shared channel information regarding the second resource bandwidth. In some examples, the SRS resource set manager 1630 may transmit an uplink grant to the UE, the uplink grant including an indication of one or more reference signal resource sets in the second resource bandwidth, an indication of a first index value associated with the second resource bandwidth, and uplink shared channel information regarding a third resource bandwidth different from the second resource bandwidth. In some cases, the one or more reference signal resource sets fully or partially overlap with frequency domain resources of a downlink reference signal.

[0202] In some cases, the indication of the one or more reference signal resource sets indicates SRS resources defined within the second resource bandwidth. In some cases, a set of uplink reference signal resource sets within the second resource bandwidth is indicated by an uplink grant, and the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources. In some cases, the uplink grant provides a first index value associated with the second resource bandwidth for the one or more reference signal resource sets and a second index value associated with the third resource bandwidth. In some cases, the first index value is mapped to one or more reference signal resource sets of the second resource bandwidth. In some cases, the uplink grant provides separate reference signal resources for each of the one or more reference signal resource sets. In some cases, the uplink grant includes a separate indication for each reference signal resource set, or maps to an index value of a configured table that provides different combinations of reference signal resources for each uplink reference signal resource set. In some cases, frequency domain resources of the first uplink reference signal and the downlink reference signal completely or partially overlap.

[0203] Figure 17A diagram of a system 1700 including a device 1705 that supports uplink reference signal techniques for non-codebook based wireless communications in accordance with various aspects of the present disclosure is shown. Device 1705 may be an example of or include components of device 1405, device 1505, or base station 105 as described herein. Device 1705 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communications manager 1710, a network communications manager 1715, a transceiver 1720, an antenna 1725, a memory 1730, a processor 1740, and an inter-station communications manager 1745. These components may be in electronic communication via one or more buses (e.g., bus 1750).

[0204] The communication manager 1710 may configure the UE to transmit uplink communications based on precoding parameters calculated based on measurements of a downlink reference signal in a first resource bandwidth in a first bandwidth portion of a channel bandwidth, wherein the uplink communications include an uplink reference signal to be transmitted in one or more reference signal resource sets in a second resource bandwidth in the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from the uplink frequency domain resources of the first resource bandwidth; transmit the downlink reference signal to the UE in the first resource bandwidth; and receive the uplink reference signal from the UE in each of the one or more reference signal resource sets in the second resource bandwidth in the first bandwidth portion.

[0205] The communication manager 1710 may also transmit uplink transmission control information to the UE, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; transmit a downlink reference signal to the UE for calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication; and receive the first uplink reference signal and the first uplink shared channel communication using the associated spatial domain parameters.

[0206] The network communications manager 1715 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1715 may manage the delivery of data communications for client devices, such as one or more UEs 115.

[0207] The transceiver 1720 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1720 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1720 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and demodulate packets received from the antenna.

[0208] In some cases, the wireless device may include a single antenna 1725. However, in some cases, the device may have more than one antenna 1725, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0209] Memory 1730 may include RAM, ROM, or a combination thereof. Memory 1730 may store computer-readable code 1735 including instructions that, when executed by a processor (e.g., processor 1740), cause the device to perform the various functions described herein. In some cases, memory 1730 may include, among other things, a BIOS that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0210] The processor 1740 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1740 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into the processor 1740. The processor 1740 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1730) to cause the device 1705 to perform various functions (e.g., various functions or tasks supporting uplink reference signal technology for non-codebook-based wireless communications).

[0211] The inter-site communication manager 1745 can manage communications with other base stations 105 and can include a controller or scheduler for controlling communications with the UE 115 in cooperation with the other base stations 105. For example, the inter-site communication manager 1745 can coordinate the scheduling of transmissions to the UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-site communication manager 1745 can provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between the base stations 105.

[0212] The code 1735 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1735 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, the code 1735 may not be directly executable by the processor 1740, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0213] Figure 18 A flow chart illustrating a method 1800 for supporting uplink reference signal techniques for non-codebook based wireless communications according to aspects of the present disclosure is shown. The operations of the method 1800 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1800 may be implemented by a UE 115 or components thereof as described herein. Figures 10 to 13 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0214] At 1805, the UE may measure a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station. The operations of 1805 may be performed according to the methods described herein. In some examples, aspects of the operations of 1805 may be performed as described with reference to Figures 10 to 13 The described reference signal measurement manager is performed.

[0215] At 1810, the UE may calculate, based on the measurement, precoding parameters for uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources that are different from the uplink frequency domain resources of the first resource bandwidth. The operations of 1810 may be performed according to the methods described herein. In some examples, aspects of the operations of 1110 may be performed as described in reference to Figures 5 to 8 The beam manager described is executed.

[0216] At 1815, the UE may transmit the uplink reference signal in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth part using the calculated precoding parameters. The operations of 1815 may be performed according to the methods described herein. In some examples, aspects of the operations of 1815 may be performed as described with reference to Figures 10 to 13 The uplink transmission manager described is executed.

[0217] Figure 19A flow chart illustrating a method 1900 for supporting uplink reference signal techniques for non-codebook based wireless communications according to aspects of the present disclosure is shown. The operations of the method 1900 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1900 may be implemented by a UE 115 or components thereof as described herein. Figures 10 to 13 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0218] At 1905, the UE may receive an uplink grant from the base station, the uplink grant including an indication of one or more reference signal resource sets in the second resource bandwidth, an indication of an index value associated with the second resource bandwidth, and uplink shared channel information about the second resource bandwidth. The operations of 1905 may be performed according to the methods described herein. In some examples, aspects of the operations of 1905 may be performed as described with reference to Figures 10 to 13 The described SRS resource set manager is used to perform the

[0219] At 1910, a UE may measure a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station. The operations of 1910 may be performed according to the methods described herein. In some examples, aspects of the operations of 1910 may be performed as described with reference to Figures 10 to 13 The described reference signal measurement manager is performed.

[0220] At 1915, the UE may calculate, based on the measurement, precoding parameters for uplink reference signals to be transmitted in one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources that are different from the uplink frequency domain resources of the first resource bandwidth. The operations of 1915 may be performed according to the methods described herein. In some examples, aspects of the operations of 1915 may be performed as described with reference to Figures 10 to 13 The described precoding manager is executed.

[0221] At 1920, the UE may transmit the uplink reference signal in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth part using the calculated precoding parameters. The operations of 1920 may be performed according to the methods described herein. In some examples, aspects of the operations of 1920 may be as described with reference to Figures 10 to 13 The described uplink transmission manager is executed.

[0222] At 1925, the UE may transmit uplink shared channel communications associated with the uplink reference signal in the second resource bandwidth. The operations of 1925 may be performed according to the methods described herein. In some examples, aspects of the operations of 1925 may be performed as described with reference to Figures 10 to 13 The described resource bandwidth manager is implemented.

[0223] Figure 20 A flow chart illustrating a method 2000 for supporting uplink reference signal techniques for non-codebook based wireless communications according to aspects of the present disclosure is shown. The operations of the method 2000 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 2000 may be implemented by a UE 115 or components thereof as described herein. Figures 10 to 13 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0224] At 2005, a UE may receive uplink transmission control information from a base station, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion. The operations of 2005 may be performed according to the methods described herein. In some examples, aspects of the operations of 2005 may be performed as described with reference to Figures 10 to 13 The beam manager described is executed.

[0225] At 2010, the UE may calculate precoding parameters for a first uplink reference signal and a first uplink shared channel communication based on a downlink reference signal received from a base station. The operations of 2010 may be performed according to the methods described herein. In some examples, aspects of the operations of 2010 may be performed as described with reference to Figures 10 to 13 The described precoding manager is executed.

[0226] At 2015, the UE may transmit a first uplink reference signal and a first uplink shared channel communication using the calculated precoding parameters and associated spatial parameters. The operations of 2015 may be performed according to the methods described herein. In some examples, aspects of the operations of 2015 may be performed as described with reference to Figures 10 to 13 The described uplink transmission manager is executed.

[0227] Figure 21A flow chart illustrating a method 2100 for supporting uplink reference signal techniques for non-codebook based wireless communications according to aspects of the present disclosure is shown. The operations of the method 2100 may be implemented by the base station 105 or components thereof as described herein. For example, the operations of the method 2100 may be implemented by the base station 105 or components thereof as described herein. Figures 14 to 17 In some examples, a base station may execute an instruction set to control functional elements of the base station to perform the following functions. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the following functions.

[0228] At 2105, the base station may configure the UE to transmit uplink communications based on precoding parameters calculated based on measurements of downlink reference signals in a first resource bandwidth in a first bandwidth portion of a channel bandwidth, wherein the uplink communications include uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth in the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources that are different from the uplink frequency domain resources of the first resource bandwidth. The operations of 2105 may be performed according to the methods described herein. In some examples, aspects of the operations of 2105 may be performed by, for example, reference to Figures 14 to 17 The configuration manager described here is executed.

[0229] At 2110, the base station may transmit the downlink reference signal to the UE in the first resource bandwidth. The operations of 2110 may be performed according to the methods described herein. In some examples, aspects of the operations of 2110 may be performed as described with reference to Figures 14 to 17 The described reference signal manager is implemented.

[0230] At 2115, the base station may receive the uplink reference signal from the UE in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion. The operations of 2115 may be performed according to the methods described herein. In some examples, aspects of the operations of 2115 may be performed as described with reference to Figures 14 to 17 The described reference signal measurement manager is performed.

[0231] Figure 22 A flow chart illustrating a method 2200 for supporting uplink reference signal techniques for non-codebook based wireless communications according to aspects of the present disclosure is shown. The operations of the method 2200 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 2200 may be implemented by a base station 105 or components thereof as described herein. Figures 14 to 17 In some examples, a base station may execute an instruction set to control functional elements of the base station to perform the following functions. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the following functions.

[0232] At 2205, the base station may configure the UE to transmit uplink communications based on precoding parameters calculated based on measurements of downlink reference signals in a first resource bandwidth of a first bandwidth portion of a channel bandwidth, wherein the uplink communications include uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources that are different from the uplink frequency domain resources of the first resource bandwidth. The operations of 2205 may be performed according to the methods described herein. In some examples, aspects of the operations of 2205 may be performed as described with reference to Figures 14 to 17 The configuration manager described here is executed.

[0233] At 2210, the base station may transmit an uplink grant to the UE, the uplink grant including an indication of one or more reference signal resource sets in the second resource bandwidth, an indication of an index value associated with the second resource bandwidth, and uplink shared channel information about the second resource bandwidth. The operations of 2210 may be performed according to the methods described herein. In some examples, aspects of the operations of 2210 may be performed as described with reference to Figures 14 to 17 The described SRS resource set manager is used to perform the

[0234] At 2215, the base station may transmit the downlink reference signal to the UE in the first resource bandwidth. The operations of 2215 may be performed according to the methods described herein. In some examples, aspects of the operations of 2215 may be performed as described with reference to Figures 14 to 17 The described reference signal manager is implemented.

[0235] At 2220, the base station may receive the uplink reference signal from the UE in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion. The operations of 2220 may be performed according to the methods described herein. In some examples, aspects of the operations of 2220 may be performed as described with reference to Figures 14 to 17 The described reference signal measurement manager is performed.

[0236] At 2225, the base station may receive an uplink shared channel communication associated with an uplink reference signal from the UE in the second resource bandwidth. The operations of 2225 may be performed according to the methods described herein. In some examples, aspects of the operations of 2225 may be performed as described in reference to Figures 14 to 17 The described resource bandwidth manager is implemented.

[0237] Figure 23A flow chart illustrating a method 2300 for supporting uplink reference signal techniques for non-codebook based wireless communications according to aspects of the present disclosure is shown. The operations of the method 2300 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 2300 may be implemented by a base station 105 or components thereof as described herein. Figures 14 to 17 In some examples, a base station may execute an instruction set to control functional elements of the base station to perform the following functions. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the following functions.

[0238] At 2305, the base station may transmit uplink transmission control information to the UE, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion. The operations of 2305 may be performed according to the methods described herein. In some examples, aspects of the operations of 2305 may be performed as described in reference to Figures 14 to 17 The beam manager described is executed.

[0239] At 2310, the base station may transmit a downlink reference signal to the UE for use in calculating precoding parameters for a first uplink reference signal and a first uplink shared channel communication. The operations of 2310 may be performed according to the methods described herein. In some examples, aspects of the operations of 2310 may be performed as described with reference to Figures 14 to 17 The described reference signal manager is implemented.

[0240] At 2315, the base station may receive a first uplink reference signal and a first uplink shared channel communication using the associated spatial domain parameters. The operations of 2315 may be performed according to the methods described herein. In some examples, aspects of the operations of 2315 may be performed as described with reference to Figures 14 to 17 The described uplink transmission manager is executed.

[0241] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0242] The following provides an overview of various aspects of the disclosure:

[0243] Aspect 1: A method for wireless communication at a UE, comprising: measuring a downlink reference signal from a base station in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station; calculating, at least in part based on the measurement, precoding parameters for an uplink reference signal to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from the uplink frequency domain resources of the first resource bandwidth; and using the calculated precoding parameters to transmit the uplink reference signal in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth portion.

[0244] Aspect 2: The method of aspect 1, wherein the measurement further comprises: measuring a downlink reference signal in contiguous or non-contiguous frequency domain resources within the first resource bandwidth.

[0245] Aspect 3: The method according to any one of aspects 1 to 2, wherein the one or more reference signal resource sets completely or partially overlap with the frequency domain resources of the downlink reference signal.

[0246] Aspect 4: The method of any one of aspects 1 to 3, further comprising: transmitting an uplink shared channel communication associated with the uplink reference signal in the second resource bandwidth.

[0247] Aspect 5: The method of Aspect 4 further includes: receiving an uplink grant from a base station, the uplink grant including an indication of one or more reference signal resource sets in a second resource bandwidth, an indication of an index value associated with the second resource bandwidth, and uplink shared channel information about the second resource bandwidth.

[0248] Aspect 6: The method of aspect 5, wherein the indication of the one or more reference signal resource sets indicates SRS resources defined within the second resource bandwidth.

[0249] Aspect 7: A method as in any of Aspects 5 to 6, wherein multiple uplink reference signal resource sets within the second resource bandwidth are indicated by the uplink grant, and the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

[0250] Aspect 8: The method of Aspect 4 further includes: receiving an uplink grant from a base station, the uplink grant including an indication of one or more reference signal resource sets in a second resource bandwidth, an indication of a first index value associated with the second resource bandwidth, and uplink shared channel information about a third resource bandwidth different from the second resource bandwidth.

[0251] Aspect 9: The method of aspect 8, wherein the uplink grant provides a first index value associated with a second resource bandwidth for the one or more reference signal resource sets and a second index value associated with a third resource bandwidth.

[0252] Aspect 10: The method of aspect 9, wherein the first index value is mapped to the one or more reference signal resource sets of the second resource bandwidth.

[0253] Aspect 11: The method according to any one of aspects 8 to 10, wherein the uplink shared channel communication and the uplink reference signal have completely or partially overlapping frequency domain resources.

[0254] Aspect 12: The method of any one of aspects 8 to 11, wherein the second resource bandwidth and the third resource bandwidth are in the same bandwidth portion of the channel bandwidth.

[0255] Aspect 13: A method as in any of Aspects 8 to 12, wherein multiple uplink reference signal resource sets within the second resource bandwidth are indicated by the uplink grant, the uplink grant providing uplink shared channel information about a third resource bandwidth different from the second resource bandwidth, and the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

[0256] Aspect 14: The method of aspect 4, wherein the uplink grant provides separate resource bandwidth indices for uplink shared channel communication and uplink reference signals.

[0257] Aspect 15: The method of aspect 14, wherein the uplink grant includes a separate indication for each separate resource bandwidth index, or an index value mapped to a configured table providing separate resource bandwidth indices for uplink shared channel communication and uplink reference signals.

[0258] Aspect 16: The method of aspect 4, wherein the uplink grant provides a separate reference signal resource for each of the one or more sets of reference signal resources.

[0259] Aspect 17: The method of any one of aspects 1 to 4, wherein the uplink grant includes a separate indication for each reference signal resource set, or an index value mapped to a configured table providing different combinations of reference signal resources for each uplink reference signal resource set.

[0260] Aspect 18: A method for wireless communication at a UE, comprising: receiving uplink transmission control information from a base station, the uplink transmission control information indicating separate spatial domain parameters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication based at least in part on a downlink reference signal received from the base station; and transmitting the first uplink reference signal and the first uplink shared channel communication using the calculated precoding parameters and associated spatial domain parameters.

[0261] Aspect 19: A method as in Aspect 18, wherein the uplink transmission control information includes a first transmission configuration indicator (TCI) state indicating a first spatial domain parameter set for a first uplink reference signal and a second TCI state indicating a second spatial domain parameter set for a first uplink shared channel communication, and these spatial domain parameters are provided as separate indications for each spatial domain parameter set, or are provided in index values ​​mapped to a configured table indicating different spatial domain parameter sets.

[0262] Aspect 20: The method of any one of aspects 18 to 19, wherein resources used for the first uplink shared channel communication occupy non-contiguous frequency resources within the first resource bandwidth or the second resource bandwidth, and separate spatial domain parameters are used for different portions of the non-contiguous frequency resources.

[0263] Aspect 21: The method according to any one of aspects 18 to 20, wherein the downlink reference signal occupies contiguous or non-contiguous frequency domain resources within the first resource bandwidth.

[0264] Aspect 22: The method according to any one of aspects 18 to 21, wherein the frequency domain resources of the first uplink reference signal and the downlink reference signal completely or partially overlap.

[0265] Aspect 23: A method for performing wireless communications at a base station, comprising: configuring a UE to transmit uplink communications based at least in part on precoding parameters calculated based on measurements of a downlink reference signal in a first resource bandwidth in a first bandwidth portion of a channel bandwidth, wherein the uplink communications include an uplink reference signal to be transmitted in one or more reference signal resource sets in a second resource bandwidth in the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources that are different from the uplink frequency domain resources of the first resource bandwidth; transmitting the downlink reference signal to the UE in the first resource bandwidth; and receiving the uplink reference signal from the UE in each of the one or more reference signal resource sets in the second resource bandwidth in the first bandwidth portion.

[0266] Aspect 24: The method of aspect 23, wherein the downlink reference signal is transmitted in contiguous or non-contiguous frequency domain resources within the first resource bandwidth.

[0267] Aspect 25: The method according to any one of aspects 23 to 24, wherein the one or more reference signal resource sets completely or partially overlap with the frequency domain resources of the downlink reference signal.

[0268] Aspect 26: The method of any one of aspects 23 to 25, further comprising: receiving an uplink shared channel communication associated with the uplink reference signal from the UE in the second resource bandwidth.

[0269] Aspect 27: The method of Aspect 26 further includes: transmitting an uplink grant to the UE, the uplink grant including an indication of one or more reference signal resource sets in the second resource bandwidth, an indication of an index value associated with the second resource bandwidth, and uplink shared channel information about the second resource bandwidth.

[0270] Aspect 28: The method of aspect 27, wherein the indication of the one or more reference signal resource sets indicates SRS resources defined within the second resource bandwidth.

[0271] Aspect 29: A method as in any of Aspects 27 to 28, wherein multiple uplink reference signal resource sets within the second resource bandwidth are indicated by the uplink grant, and the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

[0272] Aspect 30: The method of Aspect 26 further includes: transmitting an uplink grant to the UE, the uplink grant including an indication of one or more reference signal resource sets in the second resource bandwidth, an indication of a first index value associated with the second resource bandwidth, and uplink shared channel information about a third resource bandwidth different from the second resource bandwidth.

[0273] Aspect 31: The method of aspect 30, wherein the uplink grant provides a first index value associated with a second resource bandwidth for the one or more reference signal resource sets and a second index value associated with a third resource bandwidth.

[0274] Aspect 32: The method of Aspect 31, wherein the first index value is mapped to the one or more reference signal resource sets of the second resource bandwidth.

[0275] Aspect 33: The method of any one of aspects 30 to 32, wherein the uplink shared channel communication and the uplink reference signal have completely or partially overlapping frequency domain resources.

[0276] Aspect 34: The method of any one of aspects 30 to 33, wherein the second resource bandwidth and the third resource bandwidth are in the same bandwidth portion of the channel bandwidth.

[0277] Aspect 35: A method as in any of Aspects 30 to 34, wherein multiple uplink reference signal resource sets within the second resource bandwidth are indicated by the uplink grant, and the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

[0278] Aspect 36: The method of aspect 26, wherein the uplink grant provides separate resource bandwidth indices for uplink shared channel communication and uplink reference signals.

[0279] Aspect 37: The method of aspect 36, wherein the uplink grant includes a separate indication for each separate resource bandwidth index, or an index value mapped to a configured table providing separate resource bandwidth indices for uplink shared channel communication and uplink reference signals.

[0280] Aspect 38: The method of aspect 26, wherein the uplink grant provides a separate reference signal resource for each of the one or more sets of reference signal resources.

[0281] Aspect 39: The method of any one of aspects 23 to 26, wherein the uplink grant includes a separate indication for each reference signal resource set, or an index value mapped to a configured table providing different combinations of reference signal resources for each uplink reference signal resource set.

[0282] Aspect 40: A method for wireless communication at a base station, comprising: transmitting uplink transmission control information to a UE, the uplink transmission control information indicating separate spatial domain filters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in a first resource bandwidth or a second resource bandwidth of the first bandwidth portion; transmitting a downlink reference signal to the UE for calculating precoding parameters for the first uplink reference signal and the first uplink shared channel communication; and receiving the first uplink reference signal and the first uplink shared channel communication using associated spatial domain parameters.

[0283] Aspect 41: A method as in Aspect 40, wherein the uplink transmission control information indicates a first spatial domain parameter set for a first uplink reference signal and a second spatial domain parameter set for a first uplink shared channel communication, and these spatial domain parameter sets are provided as separate indications for each spatial domain parameter set, or are provided in index values ​​mapped to a configured table indicating different spatial domain parameter sets.

[0284] Aspect 42: The method of any one of aspects 40 to 41, wherein resources used for the first uplink shared channel communication occupy non-contiguous frequency resources within the first resource bandwidth or the second resource bandwidth, and separate spatial domain parameters are used for different portions of the non-contiguous frequency resources.

[0285] Aspect 43: The method of any one of aspects 40 to 42, wherein the downlink reference signal occupies contiguous or non-contiguous frequency domain resources within the first resource bandwidth.

[0286] Aspect 44: The method according to any one of Aspects 40 to 43, wherein the frequency domain resources of the first uplink reference signal and the downlink reference signal completely or partially overlap.

[0287] Aspect 45: An apparatus for wireless communication at a UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 1 to 17.

[0288] Aspect 46: An apparatus for wireless communication at a UE, comprising at least one means for performing the method of any one of aspects 1 to 17.

[0289] Aspect 47: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method of any one of aspects 1 to 17.

[0290] Aspect 48: An apparatus for wireless communication at a UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 18 to 22.

[0291] Aspect 49: An apparatus for wireless communication at a UE, comprising at least one means for performing the method of any one of aspects 18 to 22.

[0292] Aspect 50: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method of any one of aspects 18 to 22.

[0293] Aspect 51: An apparatus for performing wireless communication at a base station, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as described in any one of Aspects 23 to 39.

[0294] Aspect 52: An apparatus for wireless communication at a base station, comprising at least one means for performing the method of any one of Aspects 23 to 39.

[0295] Aspect 53: A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform any of methods 23 to 39.

[0296] Aspect 54: An apparatus for wireless communication at a base station, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of Aspects 40 to 44.

[0297] Aspect 55: An apparatus for wireless communication at a base station, comprising at least one means for performing the method of any one of Aspects 40 to 44.

[0298] Aspect 56: A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform any of methods 40 to 44.

[0299] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used throughout much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0300] The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0301] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed with a general purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0302] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or code. Other examples and implementations fall within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0303] Computer-readable media include both non-transient computer storage media and communication media, including any media that facilitates the transfer of a computer program from one place to another. Non-transient storage media can be any available medium that can be accessed by a general or special-purpose computer. As an example and not limitation, non-transient computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage device, or any other non-transient medium that can be used to carry or store the desired program code means in the form of instructions or data structures and can be accessed by a general or special-purpose computer, or a general or special-purpose processor. Similarly, any connection is also properly referred to as a computer-readable medium. For example, if software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of computer-readable media. Disk and disc, as used herein, include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0304] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items followed by a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Likewise, as used herein, the phrase "based on" should not be read as referencing a closed set of conditions. For example, an example step described as "based on condition A" could be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be read in the same manner as the phrase "based at least in part on."

[0305] In the accompanying drawings, similar components or features may have the same reference number. In addition, components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between the similar components. If only the first reference number is used in the specification, the description applies to any of the similar components having the same first reference number, regardless of the second reference number or other subsequent reference numbers.

[0306] The description set forth herein in conjunction with the accompanying drawings describes example configurations and does not represent all examples that can be implemented or fall within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and does not mean "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0307] The description herein is provided to enable one of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: measuring a downlink reference signal from the base station in a first resource bandwidth of a first bandwidth part of a channel bandwidth used for communication between the UE and the base station; calculating, based at least in part on the measurements, precoding parameters for uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth part, wherein the one or more reference signal resource sets include uplink frequency domain resources different from uplink frequency domain resources of the first resource bandwidth, and wherein the one or more reference signal resource sets fully or partially overlap with frequency domain resources of the downlink reference signal; as well as The uplink reference signal is transmitted using the calculated precoding parameters in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth part.

2. The method of claim 1 , wherein the measuring further comprises: The downlink reference signal is measured in contiguous or non-contiguous frequency-domain resources within the first resource bandwidth.

3. The method of claim 1, further comprising: An uplink shared channel communication associated with the uplink reference signal is transmitted in the second resource bandwidth.

4. The method of claim 3, further comprising: An uplink grant is received from the base station, the uplink grant including an indication of the one or more reference signal resource sets in the second resource bandwidth, an indication of an index value associated with the second resource bandwidth, and uplink shared channel information regarding the second resource bandwidth.

5. The method of claim 4, wherein the indication of the one or more reference signal resource sets indicates sounding reference signal (SRS) resources defined within the second resource bandwidth.

6. The method of claim 4 , wherein a plurality of uplink reference signal resource sets within the second resource bandwidth are indicated by the uplink grant, and wherein the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

7. The method of claim 3, further comprising: An uplink grant is received from the base station, the uplink grant including an indication of the one or more reference signal resource sets in the second resource bandwidth, an indication of a first index value associated with the second resource bandwidth, and uplink shared channel information regarding a third resource bandwidth different from the second resource bandwidth.

8. The method of claim 7, wherein the uplink grant provides the first index value associated with the second resource bandwidth for the one or more reference signal resource sets and a second index value associated with the third resource bandwidth.

9. The method of claim 8, wherein the first index value is mapped to the one or more reference signal resource sets of the second resource bandwidth.

10. The method of claim 7, wherein the uplink shared channel communication and the uplink reference signal have fully or partially overlapping frequency domain resources, and wherein the second resource bandwidth and the third resource bandwidth are in the same bandwidth portion of the channel bandwidth.

11. The method of claim 7 , wherein the plurality of uplink reference signal resource sets within the second resource bandwidth are indicated by the uplink grant, the uplink grant providing the uplink shared channel information about the third resource bandwidth that is different from the second resource bandwidth, and wherein the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

12. The method of claim 3, wherein an uplink grant provides separate resource bandwidth indices for the uplink shared channel communication and the uplink reference signal.

13. The method of claim 12 , wherein the uplink grant comprises a separate indication for each of the separate resource bandwidth indices, or an index value mapped to a configured table providing the separate resource bandwidth indices for the uplink shared channel communication and the uplink reference signal.

14. The method of claim 1, wherein the uplink grant includes a separate indication for each reference signal resource set, or an index value mapped to a configured table providing different combinations of reference signal resources for each uplink reference signal resource set.

15. A method for wireless communication at a user equipment (UE), comprising: receiving uplink transmission control information from a base station, the uplink transmission control information indicating separate spatial domain filters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in the first resource bandwidth or a second resource bandwidth of the first bandwidth portion; Calculating precoding parameters for communicating the first uplink reference signal and the first uplink shared channel based at least in part on a downlink reference signal received from the base station, wherein the first uplink reference signal fully or partially overlaps frequency domain resources with the downlink reference signal; and The first uplink reference signal and the first uplink shared channel communication are transmitted using the calculated precoding parameters and associated spatial domain filters.

16. The method of claim 15 , wherein the uplink transmission control information comprises a first transmission configuration indicator (TCI) state indicating a first spatial domain parameter set for the first uplink reference signal and a second TCI state indicating a second spatial domain parameter set for the first uplink shared channel communication, and wherein the spatial domain parameters are provided as separate indications for each spatial domain parameter set or in index values ​​mapped to a configured table indicating different spatial domain parameter sets.

17. The method of claim 15, wherein: Resources for the first uplink shared channel communication occupy non-contiguous frequency resources within the first resource bandwidth or the second resource bandwidth, and separate spatial domain parameters are used for different portions of the non-contiguous frequency resources, and wherein The downlink reference signal occupies contiguous or non-contiguous frequency domain resources within the first resource bandwidth.

18. A method for wireless communication at a base station, comprising: configuring a user equipment (UE) to transmit uplink communications based at least in part on precoding parameters calculated from measurements of downlink reference signals in a first resource bandwidth of a first bandwidth portion of a channel bandwidth, wherein the uplink communications include uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from uplink frequency domain resources of the first resource bandwidth, and wherein the one or more reference signal resource sets fully or partially overlap with frequency domain resources of the downlink reference signal; transmitting the downlink reference signal in the first resource bandwidth; as well as The uplink reference signal is received in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth part.

19. The method of claim 18, wherein the base station is a full-duplex base station, and the downlink reference signal is transmitted in contiguous or non-contiguous frequency domain resources within the first resource bandwidth.

20. The method of claim 18, further comprising: An uplink shared channel communication associated with the uplink reference signal is received in the second resource bandwidth.

21. The method of claim 20, further comprising: An uplink grant is transmitted, the uplink grant including an indication of the one or more reference signal resource sets in the second resource bandwidth, an indication of an index value associated with the second resource bandwidth, and uplink shared channel information regarding the second resource bandwidth.

22. The method of claim 21 , wherein a plurality of uplink reference signal resource sets within the second resource bandwidth are indicated by the uplink grant, and wherein the indication of the one or more reference signal resource sets is provided in a bit field having a separate bit for indicating each uplink reference signal resource set, or is provided in a bit field indicating that each uplink reference signal resource set spans the same amount of resources.

23. The method of claim 20, further comprising: An uplink grant is transmitted, the uplink grant including an indication of the one or more reference signal resource sets in the second resource bandwidth, an indication of a first index value associated with the second resource bandwidth, and uplink shared channel information regarding a third resource bandwidth different from the second resource bandwidth.

24. The method of claim 18, wherein the uplink grant includes a separate indication for each reference signal resource set, or an index value mapped to a configured table providing different combinations of reference signal resources for each uplink reference signal resource set.

25. An apparatus for wireless communication at a user equipment (UE), comprising: processor; a memory coupled to the processor; as well as instructions stored in the memory and executable by the processor to cause the apparatus to: measuring a downlink reference signal from the base station in a first resource bandwidth of a first bandwidth part of a channel bandwidth used for communication between the UE and the base station; calculating, based at least in part on the measurements, precoding parameters for uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth part, wherein the one or more reference signal resource sets include uplink frequency domain resources different from uplink frequency domain resources of the first resource bandwidth, and wherein the one or more reference signal resource sets fully or partially overlap with frequency domain resources of the downlink reference signal; as well as The uplink reference signal is transmitted using the calculated precoding parameters in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth part.

26. An apparatus for wireless communication at a user equipment (UE), comprising: processor; a memory coupled to the processor; as well as Instructions are stored in the memory and can be executed by the processor to cause the apparatus to perform the method according to any one of claims 2 to 14.

27. An apparatus for wireless communication at a user equipment (UE), comprising: processor; a memory coupled to the processor; as well as instructions stored in the memory and executable by the processor to cause the apparatus to: receiving uplink transmission control information from a base station, the uplink transmission control information indicating separate spatial domain filters for at least a first uplink reference signal and at least a first uplink shared channel communication, wherein the first uplink reference signal is transmitted in a first resource bandwidth of a first bandwidth portion of a channel bandwidth used for communication between the UE and the base station, and the first uplink shared channel communication is transmitted in the first resource bandwidth or a second resource bandwidth of the first bandwidth portion; Calculating precoding parameters for communicating the first uplink reference signal and the first uplink shared channel based at least in part on a downlink reference signal received from the base station, wherein the first uplink reference signal fully or partially overlaps frequency domain resources with the downlink reference signal; and The first uplink reference signal and the first uplink shared channel communication are transmitted using the calculated precoding parameters and associated spatial domain filters.

28. An apparatus for wireless communication at a user equipment (UE), comprising: processor; a memory coupled to the processor; as well as Instructions are stored in the memory and can be executed by the processor to cause the apparatus to perform the method according to any one of claims 16 to 17.

29. An apparatus for wireless communication at a base station, comprising: processor; a memory coupled to the processor; as well as instructions stored in the memory and executable by the processor to cause the apparatus to: configuring a user equipment (UE) to transmit uplink communications based at least in part on precoding parameters calculated from measurements of downlink reference signals in a first resource bandwidth of a first bandwidth portion of a channel bandwidth, wherein the uplink communications include uplink reference signals to be transmitted in one or more reference signal resource sets in a second resource bandwidth of the first bandwidth portion, wherein the one or more reference signal resource sets include uplink frequency domain resources different from uplink frequency domain resources of the first resource bandwidth, and wherein the one or more reference signal resource sets fully or partially overlap with frequency domain resources of the downlink reference signal; transmitting the downlink reference signal in the first resource bandwidth; as well as The uplink reference signal is received in each of the one or more reference signal resource sets in the second resource bandwidth of the first bandwidth part.

30. An apparatus for wireless communication at a base station, comprising: processor; a memory coupled to the processor; as well as Instructions are stored in the memory and can be executed by the processor to cause the apparatus to perform the method according to any one of claims 19 to 24.

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