Physical Downlink Shared Channel Reference Signal Punching

Abstract

Methods, systems, and devices for wireless communication are described. According to one or more aspects, a user equipment (UE) may identify an overlap between a first set of frequency resources allocated to a reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on a physical downlink shared channel, for a set of time periods associated with the reference signal associated with the physical downlink shared channel. The UE may determine a remaining set of frequency resources from the first set of frequency resources based on the overlap, and determine a subset of frequency resources from the remaining set of frequency resources based on a reference signal processing configuration. The UE may then process the reference signal in the subset of frequency resources based on the reference signal processing configuration.

Description

[0001] Cross-reference

[0002] This patent application claims the benefit of Greek Provisional Patent Application No. 20190100330, filed Aug. 1, 2019, by Xu et al. and entitled "PHYSICAL DOWNLINK SHARED CHANNEL REFERENCE SIGNAL PUNCTURING", and U.S. Patent Application No. 16 / 933,135, filed Jul. 20, 2020, by Xu et al. and entitled "PHYSCIAL DOWNLINK SHARED CHANNEL REFERENCE SIGNAL PUNCTURING", each of which is assigned to the assignee of this application.

[0003] Background

[0004] The following generally relates to wireless communications and to physical downlink shared channel reference signal puncturing.

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multi-access systems include fourth-generation (4G) systems (such as Long Term Evolution (LTE) systems, LTE-Advanced (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 techniques, 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).

[0006] A wireless multi-access communication system may include several base stations or network access nodes, each of which simultaneously supports communication for multiple communication devices, which may also be referred to as user equipment (UE). In some wireless communication systems (e.g., NR systems), a UE may receive reference signals associated with downlink transmissions.

[0007] Overview

[0008] The described techniques relate to improved methods, systems, devices, and apparatus (equipments) for supporting physical downlink shared channel reference signal puncturing. Generally, the described techniques provide for handling conflicts between reference signals, such as demodulation reference signals associated with the physical downlink shared channel, and resource elements not allocated to the physical downlink shared channel. According to one or more aspects of the present disclosure, a user equipment (UE) may receive a physical downlink shared channel and a demodulation reference signal associated with the physical downlink shared channel. In some instances, the UE may identify an overlap between a first set of frequency resources allocated to the demodulation reference signal and a second set of frequency resources scheduled to puncture the first set and not available for scheduling on the physical downlink shared channel. The UE may determine that the second set of frequency resources is not available for scheduling on the physical downlink shared channel. Upon identifying the overlap between the first set of frequency resources and the second set of frequency resources, the UE may determine a remaining set of frequency resources from the first set of frequency resources for each symbol associated with the demodulation reference signal. In some examples, the UE may determine a subset of frequency resources based on a reference signal processing configuration, and the UE may process the subset of frequency resources in each symbol carrying the demodulation reference signal according to the reference signal processing configuration.

[0009] A method for wireless communication at a UE is described. The method may include: receiving, from a base station, a reference signal associated with a physical downlink shared channel; identifying, for a set of time periods associated with the reference signal associated with the physical downlink shared channel, an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources scheduled to puncture the first set and not available for scheduling on the physical downlink shared channel; determining, based on the overlap, a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods; determining, based on a reference signal processing configuration, a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods; and processing the reference signal in the subset of frequency resources based on the reference signal processing configuration.

[0010] Describes an apparatus for wireless communication at a UE. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to: receive, from a base station, a reference signal associated with a physical downlink shared channel; identify, for a set of time periods associated with the reference signal associated with the physical downlink shared channel, an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources scheduled to puncture the first set of resources and unavailable for scheduling on the physical downlink shared channel; determine, for each time period in the set of time periods based on the overlap, a remaining set of frequency resources from the first set of frequency resources; determine, for each time period in the set of time periods based on a reference signal processing configuration, a subset of frequency resources from the remaining set of frequency resources; and process the reference signal in the subset of frequency resources based on the reference signal processing configuration.

[0011] Describes another device for wireless communication at a UE. The device may include means for: receiving, from a base station, a reference signal associated with a physical downlink shared channel; identifying, for a set of time periods associated with the reference signal associated with the physical downlink shared channel, an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources scheduled to puncture the first set of resources and unavailable for scheduling on the physical downlink shared channel; determining, for each time period in the set of time periods based on the overlap, a remaining set of frequency resources from the first set of frequency resources; determining, for each time period in the set of time periods based on a reference signal processing configuration, a subset of frequency resources from the remaining set of frequency resources; and processing the reference signal in the subset of frequency resources based on the reference signal processing configuration.

[0012] Describes a non-transitory computer-readable medium storing code for wireless communication at a UE. The code may include instructions executable by a processor for: receiving, from a base station, a reference signal associated with a physical downlink shared channel; identifying, for a set of time periods associated with the reference signal associated with the physical downlink shared channel, an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources scheduled to puncture the first set of resources and unavailable for scheduling on the physical downlink shared channel; determining, for each time period in the set of time periods based on the overlap, a remaining set of frequency resources from the first set of frequency resources; determining, for each time period in the set of time periods based on a reference signal processing configuration, a subset of frequency resources from the remaining set of frequency resources; and processing the reference signal in the subset of frequency resources based on the reference signal processing configuration.

[0013] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, a reference signal processing configuration indicates that a subset of frequency resources can be consistent for each time period in the set of time periods. Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: for a second set of time periods associated with a physical downlink shared channel, identifying an overlap between a third set of frequency resources allocated to the physical downlink shared channel and a second set of frequency resources that can be scheduled to puncture the third set of frequency resources; and based on the overlap between the third set of frequency resources and the second set of frequency resources, determining, for each time period in the second set of time periods, a second subset of frequency resources from the third set of frequency resources, where the second subset of frequency resources includes the frequency resources remaining in the third set of frequency resources after rate matching around the second set of frequency resources.

[0014] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: identifying a maximum common subset of frequency resources across all time periods in the set of time periods from the remaining set of frequency resources; and identifying, across all time periods in the set of time periods, the union of the second subsets of frequency resources from the third set of frequency resources, where the reference signal processing configuration indicates that the maximum common subset of frequency resources can be large enough to decode the physical downlink shared channel in the union of the second subsets of frequency resources from the third set of frequency resources.

[0015] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a subset of frequency resources from the remaining set of frequency resources may include operations, features, apparatuses, or instructions for the following actions: discarding, from the subset of frequency resources, resource elements from the remaining set of frequency resources that overlap with the second set of frequency resources. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a subset of frequency resources from the remaining set of frequency resources may include operations, features, apparatuses, or instructions for the following actions: discarding, from the subset of frequency resources, resource blocks from the remaining set of frequency resources that overlap with the second set of frequency resources by at least one resource element.

[0016] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a subset of frequency resources from a set of remaining frequency resources may include operations, features, apparatuses, or instructions for the following actions: including in the subset of frequency resources a resource block from the set of remaining frequency resources that includes at least one resource element that does not overlap any resource elements with a second set of frequency resources. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a subset of frequency resources from a set of remaining frequency resources may include operations, features, apparatuses, or instructions for the following actions: discarding from the subset of frequency resources a precoded resource block group from the set of remaining frequency resources that overlaps at least one resource element with a second set of frequency resources.

[0017] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a subset of frequency resources from a set of remaining frequency resources may include operations, features, apparatuses, or instructions for the following actions: identifying that a precoded resource block group size for a first set of frequency resources can be configured as wideband; assuming that the precoded resource block group size can be configured to be less than a default size for wideband; and based on the assumption that the precoded resource block group size can be configured as the default size, discarding from the subset of frequency resources a precoded resource block group from the set of remaining frequency resources that overlaps at least one resource element with a second set of frequency resources.

[0018] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the assumption may further include operations, features, apparatuses, or instructions for the following actions: assuming that the precoded resource block group size can be configured as the default size based on at least one of a radio resource control signal received from a base station, a capability associated with a UE, or a combination thereof. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the reference signal processing configuration indicates that the subset of frequency resources includes a maximum common subset of frequency resources across all time periods in the set of time periods.

[0019] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, a precoded resource block group size for a first set of frequency resources can be configured as wideband, or a physical downlink shared channel can be configured with a first frequency domain resource allocation type, and wherein the second set of frequency resources includes resource element-level rate matching resources. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a subset of frequency resources from a set of remaining frequency resources may further include operations, features, apparatuses, or instructions for the following actions: discarding from the subset of frequency resources a resource block from the set of remaining frequency resources that has resource elements overlapping with resource element-level rate matching resources.

[0020] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, a first set of frequency resources includes a first resource element in a set of resource elements associated with a time-division orthogonal cover code or a frequency-division orthogonal cover code, and wherein a second set of frequency resources includes resource element-level rate-matched resources that overlap at least the first resource element in the set of resource elements. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a subset of frequency resources from a remaining set of frequency resources may further include operations, features, apparatuses, or instructions for the following action: discarding the set of resource elements from the subset of frequency resources.

[0021] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the precoding resource block group size for the first set of frequency resources may be configured as wideband, or the physical downlink shared channel may be configured with a first type of frequency-domain resource allocation, and wherein the reference signal processing configuration indicates that the subset of frequency resources includes a number of frequency segments of contiguous resource blocks that is less than or equal to a threshold. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the number of frequency segments may be based on a maximum common subset of frequency resources from the remaining set of frequency resources across all time periods in the set of time periods.

[0022] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the number of frequency segments may be based on the subset of frequency resources in each time period in the set of time periods. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the reference signal processing configuration indicates that the total number of frequency resources in the second set of frequency resources is less than or equal to a threshold. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the total number of frequency resources in the second set of frequency resources corresponds to any time period in the set of time periods.

[0023] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: identifying that a first time period in the set of time periods and a second time period in the set of time periods may be associated with time-division orthogonal cover codes; and identifying, in the first time period and the second time period, a unique number of frequency resources of a first resource set that can be scheduled to be punctured and allocated to the reference signal, wherein the total number of frequency resources of a second frequency resource set may be based on the unique number of frequency resources. Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: identifying, in the set of time periods, a unique number of frequency resources of a first resource set that can be scheduled to be punctured and allocated to the reference signal, wherein the total number of frequency resources of a second frequency resource set may be based on the unique number of frequency resources.

[0024] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the reference signal processing configuration indicates that the set of time periods associated with the reference signal includes at least one of the following: a set of time periods associated with a physical downlink shared channel in a time slot, a set of time periods associated with a repetition of a physical downlink shared channel in one or more time slots scheduled by the same downlink control indicator, a set of time periods associated with a plurality of physical downlink shared channels scheduled by a multi-time-slot downlink control indicator, a set of time periods associated with a plurality of physical downlink shared channels in a plurality of time slots semi-persistently scheduled and activated by the same downlink control indicator, or a combination thereof.

[0025] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: the phase continuity of the reference signal associated with the physical downlink shared channel may be configured for time period bundling in the set of time periods associated with the reference signal. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, further determining a frequency resource subset from the remaining frequency resource set may include operations, features, apparatuses, or instructions for the following actions: identifying the punctured time periods in the set of time periods and a subset of the remaining time periods in the set of time periods after the punctured time periods; and bundling the subset of time periods based on the reference signal processing configuration, wherein the reference signal processing configuration indicates that bundling may be disabled in the punctured time periods.

[0026] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a subset of frequency resources from a set of remaining frequency resources may further include operations, features, apparatuses, or instructions for the following actions: identifying the punctured time periods in the set of time periods; and suppressing bundling of the set of time periods based on the reference signal processing configuration. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the physical downlink shared channel includes a broadcast physical downlink shared channel or a unicast physical downlink shared channel.

[0027] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the broadcast physical downlink shared channel may be scheduled with at least one of the following: a system information radio network temporary identifier, a random access radio network temporary identifier, a paging radio network temporary identifier, a temporary cell radio network temporary identifier, or a combination thereof. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the system information radio network temporary identifier includes a system information indicator set to a fixed value in a downlink control indicator. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the unicast physical downlink shared channel may be scheduled with at least one of a physical downlink control channel including a cyclic redundancy check scrambled by one or more identifiers, a physical downlink shared channel with semi-persistent scheduling, or a combination thereof.

[0028] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the one or more identifiers include at least one of the following: a cell radio network temporary identifier, a modulation and coding scheme radio network temporary identifier, a configured scheduling radio network temporary identifier. Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following action: receiving a signal from a base station indicating the reference signal processing configuration.

[0029] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the second set of frequency resources includes a synchronization signal block resource or a rate matching resource or both. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the set of time periods associated with the reference signal includes a set of symbols. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the reference signal includes a demodulation reference signal.

[0030] A method for wireless communication at a base station is described. The method may include: transmitting a reference signal associated with a physical downlink shared channel to a UE; identifying, for a set of time periods associated with the reference signal associated with the physical downlink shared channel, an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources used to puncture the first set of resources and not available for scheduling on the physical downlink shared channel; determining, based on the overlap, a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods; determining, based on a reference signal processing configuration, a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods; and scheduling the second set of frequency resources based on the reference signal processing configuration.

[0031] 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 may be executable by the processor to cause the apparatus to: transmit a reference signal associated with a physical downlink shared channel to a UE; identify, for a set of time periods associated with the reference signal associated with the physical downlink shared channel, an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources used to puncture the first set of resources and not available for scheduling on the physical downlink shared channel; determine, based on the overlap, a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods; determine, based on a reference signal processing configuration, a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods; and schedule the second set of frequency resources based on the reference signal processing configuration.

[0032] Another device for wireless communication at a base station is described. The device may include means for: transmitting a reference signal associated with a physical downlink shared channel to a UE; identifying, for a set of time periods associated with the reference signal associated with the physical downlink shared channel, an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources used to puncture the first set of resources and not available for scheduling on the physical downlink shared channel; determining, based on the overlap, a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods; determining, based on a reference signal processing configuration, a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods; and scheduling the second set of frequency resources based on the reference signal processing configuration.

[0033] 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 for: transmitting a reference signal associated with a physical downlink shared channel to a UE; identifying an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources that are used to puncture the first set and are not available for scheduling on the physical downlink shared channel, for a set of time periods associated with the reference signal associated with the physical downlink shared channel; determining, for each time period in the set of time periods, a remaining set of frequency resources from the first set of frequency resources based on the overlap; determining, for each time period in the set of time periods, a subset of frequency resources from the remaining set of frequency resources based on a reference signal processing configuration; and scheduling the second set of frequency resources based on the reference signal processing configuration.

[0034] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for: transmitting a signal indicating the reference signal processing configuration to a UE. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the reference signal processing configuration indicates that the subset of frequency resources may be consistent for each time period in the set of time periods. Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for: identifying an overlap between a third set of frequency resources allocated to the physical downlink shared channel and a second set of frequency resources that can be scheduled to puncture the third set of frequency resources, for a second set of time periods associated with the physical downlink shared channel; and determining, for each time period in the second set of time periods, a second subset of frequency resources from the third set of frequency resources based on the overlap between the third set of frequency resources and the second set of frequency resources, where the second subset of frequency resources includes the frequency resources remaining in the third set of frequency resources after rate matching around the second set of frequency resources.

[0035] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: identifying a maximum common frequency resource subset across all time periods of a set of time periods from a set of remaining frequency resources; and identifying a union of second frequency resource subsets from a third frequency resource set across all time periods of the set of time periods, wherein the reference signal processing configuration indicates that the maximum common frequency resource subset can be large enough to decode a physical downlink shared channel in the union of the second frequency resource subsets from the third frequency resource set. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, determining a frequency resource subset from a set of remaining frequency resources may include operations, features, apparatuses, or instructions for the following actions: identifying that a precoding resource block group size for a first frequency resource set can be configured as wideband; and transmitting a radio resource control signal to a UE indicating that the precoding resource block group size can be configured to be less than a default size of wideband.

[0036] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the reference signal processing configuration indicates that the frequency resource subset includes a maximum common frequency resource subset across all time periods in the set of time periods. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, a precoding resource block group size for a first frequency resource set can be configured as wideband, or a physical downlink shared channel can be configured with a first frequency domain resource allocation type, and wherein the second frequency resource set includes resource element-level rate matching resources.

[0037] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first frequency resource set includes a first resource element in a set of resource elements associated with a time division orthogonal cover code or a frequency division orthogonal cover code, and wherein the second frequency resource set includes resource element-level rate matching resources that overlap at least with the first resource element in the set of resource elements. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, a precoding resource block group size for a first frequency resource set can be configured as wideband, or a physical downlink shared channel can be configured with a first frequency domain resource allocation type, and wherein the reference signal processing configuration indicates that the frequency resource subset includes a number of frequency segments of coherent resource blocks that is less than or equal to a threshold.

[0038] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the plurality of frequency segments may be based on a maximum common frequency resource subset from a set of remaining frequency resources over all time periods of the set of time periods. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the plurality of frequency segments may be based on a subset of frequency resources in each time period of the set of time periods.

[0039] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the reference signal processing configuration indicates that the total number of frequency resources of the second set of frequency resources may be less than or equal to a threshold. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the total number of frequency resources of the second set of frequency resources corresponds to any time period in the set of time periods.

[0040] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the reference signal processing configuration indicates that the set of time periods associated with the reference signal includes at least one of the following: a set of time periods associated with a physical downlink shared channel in a time slot, a set of time periods associated with a repetition of physical downlink shared channels in one or more time slots scheduled by the same downlink control indicator, a set of time periods associated with a plurality of physical downlink shared channels scheduled by a multi-time-slot downlink control indicator, a set of time periods associated with a plurality of physical downlink shared channels in a plurality of time slots semi-persistently scheduled and activated by the same downlink control indicator, or a combination thereof.

[0041] 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: configuring the phase continuity of a reference signal associated with a physical downlink shared channel for time period bundling in a set of time periods associated with the reference signal. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the physical downlink shared channel includes a broadcast physical downlink shared channel or a unicast physical downlink shared channel.

[0042] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the broadcast physical downlink shared channel may be scheduled with at least one of the following: a system information radio network temporary identifier, a random access radio network temporary identifier, a paging radio network temporary identifier, a temporary cell radio network temporary identifier, or a combination thereof. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the system information radio network temporary identifier includes a system information indicator set to a fixed value in a downlink control indicator.

[0043] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the unicast physical downlink shared channel may be scheduled with at least one of a physical downlink control channel including a cyclic redundancy check scrambled by one or more identifiers, a physical downlink shared channel with semi-persistent scheduling, or a combination thereof. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the one or more identifiers include at least one of the following: a cell radio network temporary identifier, a modulation and coding scheme radio network temporary identifier, a configured scheduling radio network temporary identifier.

[0044] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the second frequency resource set includes a synchronization signal block resource or a rate matching resource or both. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the set of time periods associated with the reference signal includes a set of symbols. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the reference signal includes a demodulation reference signal. Brief Description of the Drawings

[0046] Figure 1 An example of a wireless communication system supporting physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is illustrated.

[0047] Figure 2 An example of a wireless communication system supporting physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is illustrated.

[0048] Figure 3 An example of reference signal processing supporting physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is illustrated.

[0049] Figure 4 An example of reference signal processing supporting physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is illustrated.

[0050] Figure 5 Examples of reference signal processing in support of physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure are illustrated.

[0051] Figure 6 Examples of resource configurations in support of physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure are illustrated.

[0052] Figure 7 Examples of timelines in support of physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure are illustrated.

[0053] Figure 8 and Figure 9 A block diagram of a device in support of physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is shown.

[0054] Figure 10 A block diagram of a communication manager in support of physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is shown.

[0055] Figure 11 A diagram of a system including a device in support of physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is shown.

[0056] Figure 12 and Figure 13 A block diagram of a device in support of physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is shown.

[0057] Figure 14 A block diagram of a communication manager in support of physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is shown.

[0058] Figure 15 A diagram of a system including a device in support of physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is shown.

[0059] Figures 16 to 19 A flowchart illustrating a method in support of physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is shown.

[0060] Detailed Description

[0061] A user equipment (UE) in a wireless communication system, such as a New Radio (NR) system or a Long Term Evolution (LTE) system, may support techniques for puncturing downlink reference signals using other types of signals, such as synchronization signals and rate matching resources. In some examples, the UE may be configured to demodulate a Physical Downlink Shared Channel (PDSCH) using Demodulation Reference Signals (DM-RSs). In such cases, the DM-RSs are transmitted in the physical resources allocated to the PDSCH. The frequency resource allocation for the DM-RSs may include the same type of resources as the frequency resource allocation for the PDSCH. Some wireless communication systems may not be configured to handle a situation where the DM-RSs overlap with a portion of the resource elements not allocated to the PDSCH. Thus, in a case where the corresponding DM-RSs would conflict (even partially) with the resource elements not available for the PDSCH, the network may be restricted from scheduling the PDSCH.

[0062] According to one or more aspects of the present disclosure, the UE may be configured to handle conflicts between DM-RSs associated with a PDSCH and resource elements not allocated to the PDSCH. In some examples, the resource elements not allocated to the PDSCH may include Synchronization Signal Block (SSB) resources or rate matching resources, or both. In some cases, the UE may handle conflicts between the DM-RSs and the resource elements not allocated to the PDSCH according to a reference signal processing configuration. As explained in more detail below, the reference signal processing configuration may support puncturing of the DM-RSs while limiting the processing complexity of doing so at the UE. In one example, a base station may transmit a reference signal processing configuration to the UE. For example, the reference signal processing configuration may indicate that the UE is not configured to process overlapping DM-RS resource elements. According to one or more aspects of the present disclosure, the UE may not assume that the base station has transmitted conflicting DM-RS resource elements.

[0063] According to one or more aspects, a UE may receive a physical downlink shared channel and a demodulation reference signal associated with the physical downlink shared channel. In some cases, the UE may identify a set of time periods associated with the physical downlink shared channel demodulation reference signal. For example, the UE may identify a set of symbols for receiving the demodulation reference signal. In some cases, the UE may identify an overlap between a first set of frequency resources allocated to the demodulation reference signal and a second set of frequency resources scheduled to puncture the first set of resources. The UE may determine that the second set of frequency resources is not available for scheduling on the physical downlink shared channel. Upon identifying the overlap between the first set of frequency resources and the second set of frequency resources, the UE may determine a remaining set of frequency resources from the first set of frequency resources for each symbol associated with the demodulation reference signal. Additionally or alternatively, the UE may determine a subset of frequency resources from the remaining set of frequency resources for each symbol. According to one or more aspects of the present disclosure, the UE may determine the subset of frequency resources based on a reference signal processing configuration. According to one or more aspects, a base station may transmit a reference signal processing configuration to the UE. Alternatively, the UE may be preconfigured according to the reference signal processing configuration. In some examples, the reference signal processing configuration may include one or more rules for limiting an increase in implementation complexity when processing puncturing of the demodulation reference signal associated with the physical downlink shared channel. In some examples, the UE may process the remaining set of frequency resources in each symbol carrying the demodulation reference signal according to the reference signal processing configuration.

[0064] Aspects of the present disclosure are initially described in the context of a wireless communication system. Aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flowcharts related to physical downlink shared channel reference signal puncturing.

[0065] Figure 1 An example of a wireless communication system 100 that supports physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is illustrated. The wireless communication system 100 includes a base station 105, a UE 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some cases, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low-latency communications, or communications with low-cost and low-complexity devices.

[0066] Base station 105 may communicate wirelessly with UE 115 via one or more base station antennas. The base station 105 described herein may include or may be referred to by those skilled in the art as a base transceiver station, radio base station, access point, radio transceiver, Node B, evolved Node B (eNB), next-generation Node B or gigabit Node B (any of which may be referred to as a gNB), home Node B, home evolved Node B, or some other suitable term. The wireless communication system 100 may include different types of base stations 105 (e.g., macro cell base stations or small cell base stations). The UE 115 described herein may be capable of communicating with various types of base stations 105 and network equipment, including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like).

[0067] Each base station 105 may be associated with a particular geographic coverage area 110 in which communication with various UEs 115 is supported. Each base station 105 may provide communication coverage for the corresponding geographic coverage area 110 via a communication link 125, and the communication link 125 between the base station 105 and the UE 115 may utilize one or more carriers. 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. The downlink transmission may also be referred to as a forward link transmission, and the uplink transmission may also be referred to as a reverse link transmission.

[0068] The geographic coverage area 110 of the base station 105 may be divided into sectors that form part of the geographic coverage area 110, and each sector may be associated with a cell. For example, each base station 105 may provide communication coverage for a macro cell, small cell, hot spot, or other type of cell, or various combinations thereof. In some examples, the base station 105 may be mobile and thus provide communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, and the overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous LTE / LTE-A / LTE-A Pro or NR network, where different types of base stations 105 provide coverage for various geographic coverage areas 110.

[0069] The term "cell" refers to a logical communication entity that is used to communicate with a base station 105 (e.g., on a carrier), and may be associated with an identifier to distinguish adjacent cells operating via the same or different carriers (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID)). In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types that may provide access for different types of devices (e.g., Machine-Type Communication (MTC), NarrowBand Internet of Things (NB-IoT), Enhanced Mobile Broadband (eMBB), or others). In some cases, the term "cell" may refer to a portion (e.g., a sector) of the geographical coverage area 110 on which the logical entity operates.

[0070] Each UE 115 may be dispersed throughout the wireless communication system 100, and each UE 115 may be stationary or mobile. UE 115 may also be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, where "device" may also be referred to as a unit, station, terminal, or client. UE 115 may also be a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may also refer to a Wireless Local Loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or MTC device, etc., which may be implemented in various articles (such as appliances, vehicles, meters, etc.).

[0071] 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 a data communication technology that allows devices to communicate with each other or with the base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices integrated with sensors or meters to measure or capture information and relay the information to a central server or application, which may utilize the information or present the information to a person interacting with the program or application. Some UEs 115 may be designed to collect information or implement automated behavior of machines. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wilderness survival monitoring, weather and geographical event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0072] Some UEs 115 may be configured to operate in a power consumption-reduced mode of operation, such as half-duplex communication (e.g., a mode that supports one-way 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 the UE 115 include entering a power saving "deep sleep" mode when not participating in active communication, or operating on a limited bandwidth (e.g., according to narrowband communication). In some cases, the UE 115 may be designed to support critical functions (e.g., mission-critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communication for these functions.

[0073] In some cases, the UE 115 may also be able to communicate directly with other UEs 115 (e.g., using peer-to-peer (P2P) or device-to-device (D2D) protocols). One or more UEs in a group of UEs 115 utilizing D2D communication may be within the geographical coverage area 110 of the base station 105. Other UEs 115 in this group may be outside the geographical coverage area 110 of the base station 105, or may not be able to receive transmissions from the base station 105 for other reasons. In some cases, each group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some cases, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between the UEs 115 without involving the base station 105.

[0074] The base stations 105 may communicate with the core network 130 and with each other. For example, the base stations 105 may interface with the core network 130 via a backhaul link 132 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130) on a backhaul link 134 (e.g., via X2, Xn, or other interfaces).

[0075] The core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 can be an evolved packet core (EPC), which can include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one packet data network (PDN) gateway (P-GW). The MME can manage non-access stratum (e.g., control plane) functions such as the mobility, authentication, and bearer management of the UE 115 served by the base station 105 associated with the EPC. User IP packets can be relayed through the S-GW, which itself can be connected to the P-GW. The P-GW can provide IP address allocation and other functions. The P-GW can be connected to the network operator IP services. The operator IP services can include access to the Internet, intranet, IP multimedia subsystem (IMS), or packet switched (PS) streaming services.

[0076] At least some network devices (such as the base station 105) can include subcomponents, such as access network entities, which can be examples of access node controllers (ANCs). Each access network entity can communicate with the respective UEs 115 through several other access network transmission entities, which can be referred to as radio heads, intelligent radio heads, or transmit / receive points (TRPs). In some configurations, the various functions of each access network entity or the base station 105 can be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., the base station 105).

[0077] 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, the range from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) band or the decimeter band because the wavelengths are in the range of approximately one decimeter to one meter in length. UHF waves can be blocked or redirected by buildings and environmental features. However, these waves can penetrate various structures sufficiently for macrocells to provide service to UEs 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz, UHF wave transmissions can be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0078] The wireless communication system 100 can also operate in the super-high frequency (SHF) band from 3 GHz to 30 GHz (also referred to as the centimeter band). The SHF band includes frequency bands that can be opportunistically used by devices that can tolerate interference from other users (such as the 5 GHz industrial, scientific, and medical (ISM) band).

[0079] The wireless communication system 100 may also operate in the extremely high frequency (EHF) regime of the spectrum (e.g., from 30 GHz to 300 GHz), which is also known as the millimeter band. In some examples, the wireless communication system 100 may support millimeter wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be even smaller and more closely spaced than UHF antennas. In some cases, this may facilitate the use of antenna arrays within the UE 115. However, the propagation of EHF transmissions may suffer even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regimes, and the use of frequency bands designated across these frequency regimes may vary by country or regulatory body.

[0080] In some cases, the wireless communication system 100 may utilize both licensed and unlicensed radio frequency bands. For example, the wireless communication system 100 may employ license-assisted access (LAA), LTE-unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (such as the 5 GHz ISM band). When operating in an unlicensed radio frequency band, wireless devices (such as the base station 105 and the UE 115) may employ a listen-before-talk (LBT) procedure to ensure that the frequency channel is clear before transmitting data. In some cases, operation in the unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with a component carrier operating in a licensed band. Operation in the unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these. Duplexing in the unlicensed spectrum may be based on frequency division duplexing (FDD), time division duplexing (TDD), or a combination of both.

[0081] In some examples, the base station 105 or the UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. For example, the wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., the base station 105) and a receiving device (e.g., the UE 115), where the transmitting device is equipped with multiple antennas and the receiving device is equipped with one or more antennas. MIMO communications may utilize multipath signal propagation to increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. For example, the transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Similarly, the receiving device may receive multiple signals via different antennas or different combinations of antennas. 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. Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device; and multi-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0082] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., the base station 105 or the UE 115) to shape or direct an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated via the antenna elements of an antenna array such that signals propagating in a particular orientation relative to the antenna array experience constructive interference while other signals experience destructive interference. The adjustment of the signals communicated via the antenna elements may include the transmitting device or the receiving device applying an amplitude and a phase shift to the signals carried via each antenna element associated with the device. The adjustment associated with each antenna element may 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).

[0083] In one example, base station 105 may use multiple antennas or antenna arrays to perform beamforming operations for directional communication with UE 115. For example, some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by base station 105 in different directions, which may include a signal being transmitted according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by base station 105 or a receiving device, such as UE 115) to identify the beam direction used by base station 105 for subsequent transmissions and / or receptions.

[0084] Some signals (such as data signals associated with a particular receiving device) may be transmitted by base station 105 in a single beam direction (e.g., the direction associated with the receiving device (such as UE 115)). In some examples, the beam direction associated with a transmission in a single beam direction may be determined at least in part based on signals transmitted in different beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions, and UE 115 may report to base station 105 an indication of the signal that it receives with the highest signal quality or other acceptable signal quality. 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 for transmitting signals multiple times in different directions (e.g., for identifying the beam direction used by UE 115 for subsequent transmissions or receptions) or for transmitting signals in a single direction (e.g., for transmitting data to a receiving device).

[0085] A receiving device (e.g., UE 115, which may be an example of a mmW receiving device) may attempt multiple receive beams 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 sets of receive beamforming weights applied to signals received at multiple antenna elements of an antenna array, or processing received signals according to different sets of receive beamforming weights 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 beams or receive directions. In some examples, the receiving device may use a single receive beam to receive in a single beam direction (e.g., when receiving a data signal). The single receive beam may be aligned in a beam direction determined at least in part based on listening according to different receive beam directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio, or other acceptable signal quality based at least in part on listening according to multiple beam directions).

[0086] In some cases, the antennas of base station 105 or UE 115 may be located within one or more antenna arrays that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may co-locate at an antenna assembly such as an antenna tower. In some cases, the antennas or antenna arrays associated with base station 105 may be located at different geographical locations. Base station 105 may have an antenna array that has a number of rows and columns of antenna ports for beamforming that base station 105 can use to support communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations.

[0087] In some cases, wireless communication system 100 may be a packet-based network that operates according to a hierarchical protocol stack. On the user plane, the communication of the bearer or packet data convergence protocol (PDCP) layer may be IP-based. The radio link control (RLC) layer may perform packet segmentation and reassembly for communication on logical channels. The media access control (MAC) layer may perform priority handling and multiplex logical channels into transport channels. The MAC layer may also use hybrid automatic repeat request (HARQ) to provide MAC layer retransmissions, thereby improving link efficiency. On the control plane, the radio resource control (RRC) protocol layer may provide the establishment, configuration, and maintenance of the RRC connection that supports the radio bearers for user plane data between UE 115 and base station 105 or core network 130. On the physical layer, transport channels may be mapped to physical channels.

[0088] In some cases, UE 115 and base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. HARQ feedback is a technique that increases the likelihood of correctly receiving data on communication link 125. HARQ may include a combination of error detection (e.g., using cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve the throughput of the MAC layer in poor radio conditions (e.g., signal-to-noise ratio conditions). In some cases, a wireless device may support simultaneous-slot HARQ feedback, where the device may provide HARQ feedback for data received in previous symbols in a particular slot in that slot. In other cases, the device may provide HARQ feedback in a subsequent slot or according to some other time interval.

[0089] Time intervals in LTE or NR may be expressed as multiples of a basic time unit, which may refer to, for example, a sampling period T s = 1 / 30,720,000 seconds). The time intervals of communication resources may be organized according to radio frames each having a duration of 10 milliseconds (ms), where the frame period may be expressed as T f = 307,200Ts 。A radio frame can be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame can include 10 subframes numbered from 0 to 9, and each subframe can have a duration of 1 ms. A subframe can be further divided into 2 time slots, each time slot having a duration of 0.5 ms, and each time slot can contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix prefixed to each symbol period). Excluding the cyclic prefix, each symbol period can contain 2048 sampling periods. In some cases, a subframe can be the smallest scheduling unit of the wireless communication system 100 and can be referred to as a transmission time interval (TTI). In other cases, the smallest scheduling unit of the wireless communication system 100 can be shorter than a subframe or can be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs) or in a selected component carrier using sTTIs).

[0090] In some wireless communication systems, a time slot can be further divided into multiple mini-slots containing one or more symbols. In some instances, the symbols or mini-slots of a mini-slot can be the smallest scheduling unit. For example, the duration of each symbol can vary depending on the subcarrier spacing or the operating frequency band. Further, some wireless communication systems can implement time slot aggregation, where multiple time slots or mini-slots are aggregated together and used for communication between the UE 115 and the base station 105.

[0091] The term "carrier" refers to a set of radio frequency spectrum resources that has a defined physical layer structure for supporting communication on the communication link 125. For example, the carrier of the communication link 125 can include a portion of the radio frequency spectrum band operating according to the physical layer channels for a given radio access technology. Each physical layer channel can carry user data, control information, or other signaling. A carrier can be associated with a predefined frequency channel (e.g., the evolved universal mobile telecommunications system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and can be located according to a channel grid for discovery by the UE 115. A carrier can be downlink or uplink (e.g., in FDD mode), or be configured to carry downlink communication and uplink communication (e.g., in TDD mode). In some examples, the signal waveform transmitted on a carrier can include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)).

[0092] For different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR), the organizational structure of a carrier can be different. For example, the communication on a carrier can be organized according to a TTI or a time slot, and each of the TTI or time slot can include user data as well as control information or signaling that supports decoding the user data. The carrier can also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc.) and control signaling that coordinates the operation of the carrier. In some examples (e.g., in a carrier aggregation configuration), the carrier can also have acquisition signaling or control signaling that coordinates the operation of other carriers.

[0093] Physical channels can be multiplexed on a carrier according to various techniques. The physical control channel and the physical data channel can be multiplexed on a downlink carrier using, for example, time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some examples, the control information transmitted in the physical control channel can be distributed in a cascaded manner between different control regions (e.g., between a common control region or a common search space and one or more UE-specific control regions or UE-specific search spaces).

[0094] A carrier can be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, this carrier bandwidth can be referred to as the "system bandwidth" of the carrier or the wireless communication system 100. For example, the carrier bandwidth can be one of several predefined bandwidths of a carrier of a specific radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). In some examples, each served UE 115 can be configured to operate on part or all of the carrier bandwidth. In other examples, some UEs 115 can be configured to operate using a narrowband protocol type associated with a predefined portion or range within the carrier (e.g., a set of subcarriers or RBs) (e.g., "in-band" deployment of the narrowband protocol type).

[0095] In a system employing MCM technology, a resource element can include a symbol period (e.g., the duration of a modulated symbol) and a subcarrier, where the symbol period and the subcarrier spacing are inversely related. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme). Thus, the more resource elements received by the UE 115 and the higher the order of the modulation scheme, the higher the data rate of the UE 115 can be. In an MIMO system, the wireless communication resources can refer to a combination of radio frequency spectrum resources, time resources, and space resources (e.g., spatial layers), and using multiple spatial layers can further increase the data rate of communicating with the UE 115.

[0096] Devices (e.g., base station 105 or UE 115) of the wireless communication system 100 may have a hardware configuration that supports communication on a specific carrier bandwidth or may be configurable to support communication on one carrier bandwidth in a carrier bandwidth set. In some examples, the wireless communication system 100 may include a base station 105 and / or a UE 115 that supports simultaneous communication via carriers associated with more than one different carrier bandwidth.

[0097] The wireless communication system 100 may support communication with the UE 115 on multiple cells or carriers, which is a feature that may be referred to as carrier aggregation or multi-carrier operation. The UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with both FDD and TDD component carriers.

[0098] In some cases, the wireless communication system 100 may utilize an enhanced component carrier (eCC). The eCC may be characterized by one or more features including a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some cases, the eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). The eCC may also be configured to operate in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum). An eCC characterized by a wide carrier bandwidth may include one or more segments that may be utilized by a UE 115 that is not capable of monitoring the entire carrier bandwidth or is otherwise configured to use a limited carrier bandwidth (e.g., to conserve power).

[0099] In some cases, the eCC may utilize a symbol duration different from other component carriers, which may include using a reduced symbol duration compared to the symbol duration of other component carriers. The shorter symbol duration may be associated with an increased spacing between adjacent subcarriers. Devices that utilize the eCC (such as the UE 115 or the base station 105) may transmit broadband signals (e.g., according to a frequency channel or carrier bandwidth of 20, 40, 60, 80 MHz, etc.) with a reduced symbol duration (e.g., 16.67 microseconds). The TTI in the eCC may include one or more symbol periods. In some cases, the TTI duration (i.e., the number of symbol periods in the TTI) may be variable.

[0100] The wireless communication system 100 may be an NR system that can utilize any combination of licensed, shared, and unlicensed spectral bands, etc. The flexibility of the eCC symbol duration and subcarrier spacing may allow the eCC to be used across multiple spectrums. In some examples, NR shared spectrum may improve spectrum utilization and spectral efficiency, particularly through dynamic vertical (e.g., across the frequency domain) and horizontal (e.g., across the time domain) sharing of resources.

[0101] In accordance with one or more aspects of the present disclosure, the UE 115 may receive a physical downlink shared channel and a demodulation reference signal associated with the physical downlink shared channel. In some cases, the UE 115 may identify a set of symbols associated with the demodulation reference signal and a set of symbols associated with the physical downlink shared channel. For example, the UE 115 may identify a set of symbols for receiving the demodulation reference signal and the physical downlink shared channel transmission. In some cases, the UE 115 may identify an overlap between a first set of frequency resources allocated to the demodulation reference signal and a second set of frequency resources scheduled to puncture the first set of resources. The UE 115 may determine that the second set of frequency resources is not available for scheduling on the physical downlink shared channel (e.g., the second set of frequency resources may include synchronization signal block resources or rate matching resources that are generally not available for scheduling on the physical downlink shared channel). Upon identifying the overlap between the first set of frequency resources and the second set of frequency resources, the UE may determine a remaining set of frequency resources from the first set of frequency resources for each symbol associated with the demodulation reference signal. Additionally or alternatively, the UE 115 may determine the subset of frequency resources based on a reference signal processing configuration, and the UE 115 may process the remaining set of frequency resources in each symbol carrying the demodulation reference signal according to the reference signal processing configuration.

[0102] Figure 2 An example of a wireless communication system 200 that supports physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is illustrated. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. For example, the wireless communication system 200 may include a UE 115-a and a base station 105-a. Figure 2 The base station 105-a described in Figure 1 may be an example of the base station 105 described in Figure 1 . In some examples, the base station 105-a may be referred to as a network device or a next generation Node B (gNB). The UE 115-a may be an example of the UE 115 described in

[0103] Wireless communication system 200 may illustrate operations and communications between base station 105 and UE 115 that support techniques for puncturing downlink demodulation reference signals. In some wireless communication systems, the physical downlink shared channel demodulation reference signal is a type of physical layer signal that serves as a reference signal for decoding the physical downlink shared channel. Specifically, in a 5G system (or NR system), since there is no cell-specific reference signal, the demodulation reference signal is used to decode the physical downlink shared channel demodulation. In some wireless communication systems, the physical downlink shared channel demodulation reference signal is transmitted in the physical resources allocated to the physical downlink shared channel. In some cases, the frequency resource allocation for the demodulation reference signal includes the same type of resources as the frequency resource allocation for the physical downlink shared channel. In some examples, the resource elements for the demodulation reference signal may be within the common resource blocks allocated for physical downlink shared channel transmission. In some examples, a UE (such as UE 115-a) may not be configured to handle a situation where the demodulation reference signal partially overlaps with resource elements not allocated to (e.g., not available for) the physical downlink shared channel.

[0104] Additionally, in some wireless communication systems, in a case where an associated demodulation reference signal would conflict (even partially) with one or more resource elements not available for transmitting a physical downlink shared channel, a base station (such as base station 105-a) may not configure the physical downlink shared channel. In such a case, it may not be desirable for a UE to handle a situation where resource elements associated with a physical downlink shared channel demodulation reference signal overlap (even partially) with one or more resource elements not available for the physical downlink shared channel. In such a case, resource elements not available for the physical downlink shared channel may be described as a set of resources not available for scheduling on the physical downlink shared channel. For example, these unavailable resource elements may at least include synchronization signal block resources or rate matching resources or both. In some cases, synchronization signal block resources and physical broadcast channel block resources occupy 20 resource blocks. In some cases, rate matching resources may be resource block-level resources, or resource element-level resources, or both. In some examples, if resource block-level resources are configured by the base station, the UE may be configured to rate match the physical downlink shared channel around a complete resource block. In some examples, if resource element-level resources are configured by the base station, the UE may be configured to rate match the physical downlink shared channel around one or more resource elements. Thus, in some wireless communication systems, although some frequency resources may be available for synchronization signal blocks, these resources may be restricted so as not to overlap with demodulation reference signal symbols. In some cases, the frequency allocation for one or more demodulation reference signal resource elements may be specified by a physical downlink shared channel frequency allocation pattern, but the demodulation reference signal symbols do not overlap with any synchronization signal block resources or rate matching resources.

[0105] In some existing wireless communication systems, a UE may receive a physical downlink shared channel scheduled with the following: a system information radio network temporary identifier and a system information indicator set to 1 in a downlink control indicator, a random access radio network temporary identifier, a paging radio network temporary identifier, or a temporary cell radio network temporary identifier. In such a case, the UE may assume a synchronization signal block or a physical broadcast channel block transmission according to ssb-PositionsInBurst (ssb positions in a burst). If the physical downlink shared channel resource allocation overlaps with a physical resource block including a synchronization signal block or a physical broadcast channel block transmission resource, the UE may assume that the physical resource block including the synchronization signal block or the physical broadcast channel block transmission resource is not available for the physical downlink shared channel resource allocation in the OFDM symbol transmitting the synchronization signal block or the physical broadcast channel block. According to another aspect, the UE may receive a physical downlink shared channel scheduled by a physical downlink control channel and having a cyclic redundancy check scrambled by a cell radio network temporary identifier, a modulation and coding scheme cell radio network temporary identifier, or a configured scheduling radio network temporary identifier, or a physical downlink shared channel with semi-persistent scheduling. In such an example, the resource elements corresponding to the configured or dynamically indicated resources are not available for the physical downlink shared channel. In addition, if the physical downlink shared channel resource allocation overlaps with a physical resource block including a synchronization signal block or a physical broadcast channel block transmission resource, the UE may assume a synchronization signal block or a physical broadcast channel block transmission according to ssb-PositionsInBurst, and the UE may assume that the physical resource block including the synchronization signal block or the physical broadcast channel block transmission resource is not available for the physical downlink shared channel resource allocation. For example, in the case of a unicast physical downlink shared channel, the physical downlink shared channel may perform rate matching around the available resources. Therefore, according to some wireless communication systems, for the physical downlink shared channel, the physical downlink shared channel demodulation reference signal puncturing by the synchronization signal block resources or the rate matching resources may be limited.

[0106] According to one or more aspects of existing wireless communication systems, although the frequency allocation for demodulation reference signals may follow the physical downlink shared channel frequency allocation pattern, the frequency resources allocated to demodulation reference signals may be restricted to avoid conflicts with synchronization signal block resources or rate-matched symbols (e.g., resources). If the resource block group is large, such restrictions can potentially lead to inefficient frequency bandwidth resource allocation. In some cases, type 0 frequency resource allocation may indicate frequency resource allocation based on a bit map. In type 0 frequency resource allocation, each bit may correspond to a resource block group. In some cases, the resource block group size may be based on the bandwidth part size. If a resource block is unavailable (e.g., if a resource block conflicts with a synchronization signal block resource or a rate-matched resource), then the entire resource block group is unavailable for physical downlink shared channel resource allocation. In one example, the resource block group size may be 16. If a resource block conflicts with a synchronization signal block resource or a rate-matched resource, then the remaining 15 resource blocks are unavailable for resource allocation. In another example, for type 1 physical downlink shared channel frequency domain resource allocation, in symbols that overlap with synchronization signal block resources or rate-matched resources or both, demodulation reference signals and associated physical downlink shared channels may not be allocated across the full bandwidth. In some cases, physical downlink shared channel frequency domain resource allocation may be based on resource block group size (e.g., type 0), where each bit in the resource allocation bit map indicates whether the resource block group is allocated to the physical downlink shared channel. In some cases, physical downlink shared channel frequency domain resource allocation may be based on contiguous resource block allocation (e.g., type 1), where the starting resource block and the number of allocated resource blocks are provided until there is a synchronization signal block within the resource block group.

[0107] One or more aspects of the present disclosure allow physical downlink shared channel demodulation reference signals to conflict with synchronization signal block resources or rate-matched resources or both. In some cases, conflicting physical downlink shared channel demodulation reference signal resources may be punctured by a UE (such as UE 115-a). That is, UE 115-a may not be required to process conflicting physical downlink shared channel demodulation reference signal resource elements. According to one or more aspects of the present disclosure, UE 115-a may not assume that base station 105-a has transmitted conflicting physical downlink shared channel demodulation reference signal resource elements. The present disclosure additionally provides techniques for limiting the increase in implementation complexity due to demodulation reference signal puncturing. Techniques for limiting the increase in implementation complexity may include processing the reference signal processing configuration and will be described in more detail with respect to Figures 3 to 7 to be described in more detail.

[0108] As Figure 2As depicted in the example of, base station 105-a and UE 115-a may communicate using communication link 205. In some examples, UE 115-a may receive physical downlink shared channel 215 and demodulation reference signal 210 associated with physical downlink shared channel 215. In some cases, UE 115-a may use demodulation reference signal 210 to demodulate physical downlink shared channel 215. In some examples, UE 115-a may receive a reference signal associated with a physical downlink shared channel and may identify an overlap between a first set of frequency resources allocated to demodulation reference signal 210 and a second set of frequency resources 220 that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel for a set of time periods associated with the physical downlink shared channel demodulation reference signal. Although Figure 2 it is depicted that a single demodulation reference signal 210 overlaps with the second set of frequency resources 220 (or punctured resources), it is understood that multiple demodulation reference signals may overlap with punctured resources (such as synchronization signal block resources or rate matching resources or both). Additionally, UE 115-a may identify an overlap between a set of frequency resources allocated to physical downlink shared channel 215 and a set of frequency resources 225 that are not available for scheduling on the physical downlink shared channel.

[0109] Upon identifying the overlap between the first set of frequency resources allocated to demodulation reference signal 210 and the second punctured frequency resource set 220, UE 115-a may determine a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods. That is, UE 115-a may determine the remaining set of frequency resources in each demodulation reference signal 210 symbol. In some cases, UE 115-a may determine a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods based on a reference signal processing configuration. According to one or more aspects, base station 105-a may transmit the reference signal processing configuration to UE 115-a. Additionally or alternatively, UE 115-a may be pre-configured according to the reference signal processing configuration (e.g., UE 115-a may have a reference signal processing configuration pre-configured in hardware and / or software). In some examples, the reference signal processing configuration may include one or more rules for limiting an increase in implementation complexity when processing physical downlink shared channel demodulation reference signal puncturing. In some examples, UE 115-a may process the demodulation reference signals in the subset of frequency resources based on the reference signal processing configuration. For example, UE 115-a may process the remaining set of frequency resources in each demodulation reference signal based on the reference signal processing configuration.

[0110] Figure 3An example of reference signal processing 300 that supports physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is explained. In some examples, reference signal processing configuration 300 may implement aspects of the wireless communication system 100 described in Figure 1 and aspects of the wireless communication system 200 described in Figure 2 . The methods described in Figure 3 may be performed by a UE and a base station, which may be examples of the UE 115 and base station 105 described in Figure 1 and Figure 2 .

[0111] As depicted in an example such as Figure 3 , the UE 115 may receive a physical downlink shared channel in symbol 315 and a demodulation reference signal associated with the physical downlink shared channel in symbol 310. As previously discussed, the UE 115 may be configured to use the demodulation reference signal to demodulate the physical downlink shared channel. In an example of Figure 3 , the UE 115 may additionally receive a demodulation reference signal in symbol 325, followed by a physical downlink shared channel in symbol 330. When receiving the demodulation reference signal in symbol 310, the UE 115 may identify an overlap between a first set of frequency resources allocated to the demodulation reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel. Additionally, the frequency resources allocated to the physical downlink shared channel in symbol 315 may overlap with a punctured frequency resource set 340. Similarly, the frequency resources allocated to the physical downlink shared channel in symbol 330 may overlap with a punctured frequency resource set 345. In an example of Figure 3 , the UE 115 may identify that a frequency resource overlaps with a second set of frequency resources 305 (such as resources not available for the physical downlink shared channel). The UE 115 may then determine a remaining set of frequency resources 335 from the first set of frequency resources for symbol 310 based on the overlap. In some cases, the UE 115 may determine a subset of frequency resources from the remaining set of frequency resources 335 for each symbol in the set of symbols in which the demodulation reference signal is received (e.g., symbols 310 and 325).

[0112] In some cases, the UE 115 may determine the subset of frequency resources based on a reference signal processing configuration. In some examples, the UE 115 may receive a reference signal processing configuration transmitted by the base station 105. In some examples, the UE 115 may be preconfigured according to the reference signal processing configuration. Although in Figure 3In the example, the frequency resource subset is depicted as being the same as the remaining frequency resource set 335, but it can be understood that the frequency resource subset can be different from the remaining frequency resource set 335. In some examples, the UE 115 can receive a signal from the base station 105 indicating a reference signal processing configuration. In some examples, the reference signal processing configuration can indicate that the frequency resource subset is consistent for each symbol (or time period) in the set of symbols that receive the demodulation reference signal. The UE 115 can process the demodulation reference signal in the frequency resource subset based on the reference signal processing configuration. For example, the UE 115 can determine that the set of demodulation reference signal resource elements can be consistent in all demodulation reference signal symbols (e.g., symbols 310 and 325) after being punctured by the synchronization signal block resource or the rate matching resource or both. As Figure 3 depicted in the example, the UE 115 can assume that the demodulation reference signal in symbol 325 is punctured using the overlapping frequency resource 320 (such as a resource not available for the physical downlink shared channel), and the overlapping frequency resource 320 can be the same as the overlap between the demodulation reference signal resource in symbol 310 and the second frequency resource set 305.

[0113] In some examples, the reference signal processing configuration can indicate that all demodulation reference signal symbols considered for processing the physical downlink shared channel can include at least one of the following: a set of physical downlink shared channel demodulation reference signal symbols associated with the physical downlink shared channel in a mini-slot or a slot; a set of symbols associated with multiple repetitions of the physical downlink shared channel in one or more slots scheduled by the same downlink control indicator; a set of symbols associated with multiple physical downlink shared channels scheduled by a multi-slot downlink control indicator; a set of symbols associated with multiple physical downlink shared channels semi-persistently scheduled and activated by the same downlink control indicator in multiple slots; a set of physical downlink shared channel demodulation reference signal symbols beamformed in the time domain; or a combination thereof.

[0114] In some cases, the phase continuity of reference signals associated with the physical downlink shared channel is configured for symbol bundling associated with the demodulation reference signal. In one example, the reference signal processing configuration may configure UE 115 to identify the punctured symbols in a symbol set and a subset of symbols remaining in the symbol set after the punctured time period. UE 115 may bundle the subset of symbols based on a reference signal processing configuration indicating the disabling of bundling in the punctured symbols. For example, the reference signal processing configuration may indicate that it is desired for UE 115 to stop bundling at the punctured demodulation reference signal symbols and restart after the punctured symbols. Additionally or alternatively, the reference signal processing configuration may configure UE 115 to suppress time domain bundling of the symbol set if one of the symbols in the set is punctured.

[0115] According to one or more examples, the physical downlink shared channel may include a broadcast physical downlink shared channel or a unicast physical downlink shared channel. In some cases, the broadcast physical downlink shared channel may be scheduled with at least one of the following: a system information radio network temporary identifier, a random access radio network temporary identifier, a paging radio network temporary identifier, a temporary cell radio network temporary identifier, or a combination thereof. In some cases, the system information radio network temporary identifier may include a system information indicator set to a fixed value in a downlink control indicator. In some cases, the unicast physical downlink shared channel may be scheduled with at least one of the following: a physical downlink control channel including a cyclic redundancy check scrambled by at least one of a cell radio network temporary identifier, a modulation and coding scheme radio network temporary identifier, a configured scheduling radio network temporary identifier, a physical downlink shared channel with semi-persistent scheduling, or a combination thereof.

[0116] Figure 4 An example of reference signal processing 400 supporting physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is illustrated. In some examples, reference signal processing 400 may implement aspects of wireless communication system 100 as described in Figure 1 and wireless communication system 200 as described in Figure 2 . Figure 4 The methods described in Figure 1 and Figure 2 may be performed by a UE and a base station, which may be examples of UE 115 and base station 105 as described in

[0117] According to one or more aspects of the present disclosure, the UE 115 may receive a demodulation reference signal in symbol 410 and a physical downlink shared channel in symbol 415. In some cases, the UE 115 may use the demodulation reference signal to demodulate the physical downlink shared channel in symbol 415. In some cases, the UE 115 may determine a first set of frequency resources allocated to the demodulation reference signal. In Figure 4 an example, the first set of frequency resources may include the frequency resources in symbol 410 and the frequency resources in symbol 425. In some cases, the UE 115 may identify an overlap between the first set of frequency resources allocated to the demodulation reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel. For example, the UE 115 may identify that a portion of the frequency resources in symbol 410 overlaps with the punctured frequency resources 405 that are not available for the physical downlink shared channel. Additionally, the UE 115 may identify that a portion of the frequency resources in symbol 425 overlaps with the punctured frequency resources 430. In some cases, the UE 115 may determine a remaining set of frequency resources from the first set of frequency resources for symbols 410 and 425 based on the overlap. In some examples, the UE 115 may identify a second set of symbols associated with the physical downlink shared channel. As Figure 4 depicted in the example of, the UE 115 may receive the physical downlink shared channel on symbols 415 and 435. In some cases, the UE 115 may identify an overlap between a third set of frequency resources allocated to the physical downlink shared channel and the second set of frequency resources that are scheduled to puncture the third set of frequency resources. For example, the UE 115 may identify that a portion of the frequency resources in symbol 415 overlaps with the punctured frequency resources 420. The UE 115 may also identify that a portion of the frequency resources in symbol 435 overlaps with the punctured frequency resources 440.

[0118] In some cases, the UE 115 may determine the frequency resources remaining in the third set of frequency resources after rate matching around the second set of frequency resources. For example, the UE 115 may determine the remaining frequency resources in symbols 415 and 435 after rate matching around the punctured frequency resources 420 and the punctured frequency resources 440, respectively. In some instances, the UE115 may identify a maximum common frequency resource subset across all symbols of the set of symbols associated with the demodulation reference signal. In Figure 4In an example, the UE 115 may determine a maximum common frequency resource subset across symbol 410 and symbol 425. The UE 115 may additionally identify the union of second frequency resource subsets from a third frequency resource set across all time periods in the set of time periods. In some examples, the UE 115 may receive a signal from the base station 105 indicating a reference signal processing configuration. In some cases, the reference signal processing configuration may indicate or the UE 115 may handle a case where the maximum common frequency resource subset is large enough to decode a physical downlink shared channel in the union of the second frequency resource subsets from the third frequency resource set. That is, the UE 115 may determine that the intersection of the resource elements associated with the demodulation reference signal after puncturing among all demodulation reference signal symbols covers the union of the resource elements associated with the physical downlink shared channel.

[0119] In some cases, the UE 115 may determine a frequency resource subset from a remaining frequency resource set for each symbol in the set of symbols based on the reference signal processing configuration. In some examples, the UE 115 may process the demodulation reference signal in the frequency resource subset based on the reference signal processing configuration. In some cases, the UE 115 may receive a reference signal processing configuration from the base station 105. In some cases, the UE 115 may be preconfigured with the reference signal processing configuration. In some cases, the reference signal processing configuration may configure the UE 115 to discard resource elements overlapping with a second frequency resource set from the remaining frequency resource set. That is, the reference signal processing configuration may configure the UE 115 to discard overlapping resource elements. Additionally or alternatively, the reference signal processing configuration may configure the UE 115 to discard a resource block from the remaining frequency resource set that overlaps with the second frequency resource set by at least one resource element from the frequency resource subset. For example, the reference signal processing configuration may configure the UE 115 to discard a resource block if the resource block is partially punctured. In some cases, the reference signal processing configuration may configure the UE 115 to include, in the frequency resource subset, a resource block from the remaining frequency resource set that contains at least one resource element that does not overlap with any resource element of the second frequency resource set. For example, the reference signal processing configuration may configure the UE 115 to process the demodulation reference signal treating a partial resource block as a complete resource block.

[0120] In accordance with one or more aspects of the present disclosure, a reference signal processing configuration may instruct the UE 115 to discard, from a remaining frequency resource set, a precoded resource block group that overlaps at least one resource element with a second frequency resource set from within the subset of frequency resources. That is, if a precoded resource block group is partially punctured, the UE 115 may discard the precoded resource block group. In some cases, the UE 115 may identify that the precoded resource block group size for a first frequency resource set is configured as wideband and assume that the precoded resource block group size is configured to be less than the default wideband size. For example, the reference signal processing configuration may configure the UE 115 to assume a precoded resource block group size of a default granularity (such as two or four) rather than wideband. In some cases, the default granularity may be based on radio resource control signals received from the base station 105, or capabilities associated with the UE 115, or a combination thereof. Thus, if the precoded resource block group is configured as wideband, the UE 115 may be configured to assume the default size of the precoded resource block group via radio resource control signals or UE capabilities.

[0121] As previously discussed, a reference signal processing configuration may define demodulation reference signal symbols for processing physical downlink shared channels. For example, the reference signal processing configuration may define that symbol 410 and symbol 425 may be considered for processing physical downlink shared channels. For example, the reference signal processing configuration may define that the demodulation reference signal symbols include at least one of the following: a set of symbols associated with a physical downlink shared channel in a time slot, a set of symbols associated with multiple repetitions of a physical downlink shared channel in one or more time slots scheduled by the same downlink control indicator, a set of symbols associated with multiple physical downlink shared channels scheduled by a multi-time-slot downlink control indicator, a set of symbols associated with multiple physical downlink shared channels in multiple time slots semi-persistently scheduled and activated by the same downlink control indicator, or a combination thereof. According to one or more examples, the physical downlink shared channel may include a broadcast physical downlink shared channel or a unicast physical downlink shared channel.

[0122] Figure 5 An example of reference signal processing 500 that supports physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is illustrated. In some examples, reference signal processing 500 may implement aspects of the wireless communication system 100 as described in Figure 1 and aspects of the wireless communication system 200 as described in Figure 2 The method described in Figure 5 may be performed by a UE and a base station, which may be examples of the UE 115 and the base station 105 described with reference to Figure 1 and Figure 2

[0123] ​As previously referenced Figures 1 to 4 As described, UE 115 may receive a demodulation reference signal over one or more symbols and a physical downlink shared channel over one or more symbols. As Figure 5 depicted in the example of, UE 115 may receive a demodulation reference signal in symbol 510 and a physical downlink shared channel in symbol 515. Additionally, UE 115 may receive a demodulation reference signal in symbol 525 and a physical downlink shared channel in symbol 535. In some cases, UE 115 may determine a first set of frequency resources allocated to the demodulation reference signal (such as the frequency resources in symbol 510 and the frequency resources in symbol 525). In some cases, UE 115 may identify an overlap between the first set of frequency resources allocated to the demodulation reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel. As Figure 5 depicted in the example of, UE 115 may identify that a portion of the frequency resources in symbol 510 overlaps with the punctured frequency resources 505, and a portion of the frequency resources in symbol 525 overlaps with the punctured frequency resources 530. UE 115 may additionally determine a remaining set of frequency resources from the first set of frequency resources for each symbol in the symbol set based on the overlap. For example, UE 115 may determine a remaining set of frequency resources from the frequency resources in symbol 510 and the frequency resources in symbol 525.

[0124] According to one or more aspects of the present disclosure, a UE may determine a subset of frequency resources from the remaining set of frequency resources for each demodulation reference signal symbol (such as symbol 510 and symbol 525) based on a reference signal processing configuration. In one example, the reference signal processing configuration may indicate that the subset of frequency resources includes the largest common subset of frequency resources across all symbols associated with the demodulation reference signal (such as symbol 510 and symbol 525).

[0125] That is, the reference signal processing configuration may configure UE 115 to process the demodulation reference signal in the intersection of the demodulation reference signal resource elements after puncturing in all demodulation reference signal symbols. As Figure 5 depicted in the example of, UE 115 may determine a remaining set of frequency resources 545 from symbol 510 and a remaining set of frequency resources 540 from symbol 525. UE 115 may then determine the largest common subset of frequency resources across symbol 510 and symbol 525. In Figure 5 the example of, the largest common subset of frequency resources may correspond to the remaining set of frequency resources 540. In some cases, the reference signal processing configuration may configure UE 115 to assume that the base station is not guaranteed to transmit the demodulation reference signal in the remaining resource elements.

[0126] In some implementations, the reference signal processing configuration may define demodulation reference signal symbols for processing the physical downlink shared channel. In some examples, the physical downlink shared channel may include a broadcast physical downlink shared channel or a unicast physical downlink shared channel. In some examples, the broadcast physical downlink shared channel may be scheduled with at least one of the following: a system information radio network temporary identifier, a random access radio network temporary identifier, a paging radio network temporary identifier, a temporary cell radio network temporary identifier, or a combination thereof. In some examples, the system information radio network temporary identifier may include a system information indicator set to a fixed value in the downlink control indicator. In some cases, the unicast physical downlink shared channel may be scheduled with at least one of a physical downlink control channel including a cyclic redundancy check scrambled by one or more identifiers, a physical downlink shared channel with semi-persistent scheduling, or a combination thereof. The one or more identifiers may include a cell radio network temporary identifier, a modulation and coding scheme radio network temporary identifier, a configured scheduling radio network temporary identifier.

[0127] Figure 6 An example of a resource configuration 600 that supports physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is illustrated. In some examples, the resource configuration 600 may implement aspects of the wireless communication system 100. The resource configuration 600 illustrates an example frame structure design for communication in a wireless communication system, which may implement aspects of the wireless communication system 100 as described in reference Figure 1 to. The resource configuration 600 shows a demodulation reference signal resource set (e.g., a time-frequency resource set) and a mapping to several antenna ports that a base station may use to transmit demodulation reference signals to a UE, which may be examples of corresponding devices as described in reference Figure 1 to.

[0128] Figure 6 An example resource configuration 600 shows four orthogonal resource blocks 610. The four resource blocks 610 may be orthogonalized using orthogonal cover codes (e.g., orthogonal cover codes of length 4). As shown, each resource block 610 includes 14 symbols in the time domain and 12 subcarriers in the frequency domain. Several resource elements are shown in each resource block 610, where each resource element is defined by one symbol in the time domain and one subcarrier in the frequency domain. Although the resource configuration 600 shows the resource block 610 as including 14 symbols and 12 subcarriers, it should be understood that the resource configuration 600 is an example, and the resource configuration 600 may be similarly applied to configure demodulation reference signal patterns for resource blocks including any number of uniform or non-uniform symbols and subcarriers.

[0129] Figure 6 The exemplary resource configuration 600 shows a demodulation reference signal resource configured to transmit and receive demodulation reference signals of a second type (e.g., type 2) having a length of two symbols (e.g., double-symbol length), i.e., a "double-symbol type 2" demodulation reference signal configuration. According to the resource configuration 600, the base station can transmit demodulation reference signals on the demodulation reference signal resource using up to 12 antenna ports. As shown in the exemplary resource configuration 600, the demodulation reference signal resource can occupy the third and fourth symbols (e.g., symbols 2 and 3) of each resource block. The resource configuration 600 shows the demodulation reference signal resources for the preloaded demodulation reference signal pattern in each resource block. That is, the preloaded demodulation reference signal pattern can be used for the initial demodulation reference signal transmission (e.g., the initial demodulation reference signal transmission of one or more demodulation reference signal transmissions) using the demodulation reference signal resources within the resource block 610. However, it should be understood that additional resource elements of the resource block can be allocated for additional demodulation reference signal transmissions after the demodulation reference signal resources shown in the exemplary resource configuration 600 of Figure 6 the exemplary resource configuration 600.

[0130] According to the double-symbol type 2 demodulation reference signal configuration shown in the resource configuration 600, the base station can transmit demodulation reference signals to the UE on the demodulation reference signal resource using up to 12 antenna ports. As Figure 6 depicted in the example of, the demodulation reference signal pattern 605 includes an orthogonal demodulation reference signal pattern, where the demodulation reference signal pattern is orthogonal in a (2*2) frequency and time resource element set.

[0131] As previously referenced Figures 1 to 5 as described, the UE 115 can receive demodulation reference signals over one or more symbols and a physical downlink shared channel over one or more symbols. For example, the UE 115 can use as described herein with reference to Figure 6The demodulation reference signal resources under discussion are used to receive the demodulation reference signal. The UE 115 may identify the overlap between the frequency resources allocated to the demodulation reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel. In some examples, the UE 115 may determine a remaining set of frequency resources from these frequency resources in the symbol associated with the demodulation reference signal. The precoding resource block group size for the first set of frequency resources (e.g., the frequency resources allocated to the demodulation reference signal) may be configured as wideband. Additionally or alternatively, the physical downlink shared channel may be configured with frequency domain resource allocation type 1 for contiguous resource block allocation. In some cases, the second set of frequency resources may include resource element level rate matching resources. In some implementations, the UE 115 may determine a subset of frequency resources from the remaining set of frequency resources for each time symbol based on the reference signal processing configuration. In one implementation, the reference signal processing configuration may configure the UE 115 such that it is not expected that the UE 115 processes resource blocks from the remaining set of frequency resources that have resource elements overlapping with the resource element level rate matching resources in the frequency resource subset. That is, if the demodulation reference signal conflicts with the resource elements of the rate matching resources, the reference signal processing configuration may not configure the UE 115 to process the resource blocks.

[0132] In some examples, the first set of frequency resources may include a first resource element in a set of resource elements associated with a time division orthogonal cover code or a frequency division orthogonal cover code. Additionally or alternatively, the second set of frequency resources may include resource element level rate matching resources that overlap with at least the first resource element in the set of resource elements.

[0133] Figure 7 An example of a timeline 700 supporting physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is illustrated. In some examples, the timeline 700 may implement aspects of the wireless communication system 100.

[0134] According to one or more aspects, the UE 115 may receive demodulation reference signals associated with a physical downlink shared channel over a first set of frequency resources. In some cases, the precoding resource block group size for the first set of frequency resources is configured as wideband, or the physical downlink shared channel is configured with frequency domain resource allocation type 1 for contiguous resource block allocation. The UE 115 may identify an overlap between the first set of frequency resources assigned to the demodulation reference signals and a second set of frequency resources that is scheduled to puncture the first set and is not available for scheduling on the physical downlink shared channel. In some examples, the UE 115 may process the demodulation reference signals in the frequency resource subset based on a reference signal processing configuration. In some cases, the reference signal processing configuration may indicate that the frequency resource subset includes a number of frequency segments less than or equal to a threshold of contiguous resource blocks.

[0135] As Figure 7 depicted in the example of, the UE 115 may identify demodulation reference signals in symbols 705, 710, 715, and 720 within the contiguous resource block 725. In some cases, the frequency resources for the demodulation reference signals in symbols 705, 710, 715, and 720 may overlap with synchronization signal block resources or rate matching resources. The UE 115 may determine that the number of frequency segments associated with the demodulation reference signals in the contiguous resource block 725 does not exceed a maximum number. In some cases, the number of frequency segments may be based on the largest common frequency resource subset from the remaining frequency resource set across all symbols in the symbol set (e.g., symbols 705, 710, 715, and 720). For example, the reference signal processing configuration may configure the UE 115 to determine the number of frequency segments as the intersection of the resource elements associated with the demodulation reference signals after puncturing across all demodulation reference signal symbols (or symbols 705, 710, 715, and 720). Additionally or alternatively, the reference signal processing configuration may configure the number of frequency segments based on the frequency resource subsets associated with the demodulation reference signals in each symbol of the symbol set. That is, the reference signal processing configuration may configure the number of frequency segments based on the frequency resources remaining after overlap in each of symbols 705, 710, 715, and 720.

[0136] According to one or more aspects of the present disclosure, a reference signal processing configuration may indicate that a total number of frequency resources of a second set of frequency resources (e.g., resources where a physical downlink shared channel is unavailable) is less than or equal to a threshold. In some cases, the total number of frequency resources of the second set of frequency resources corresponds to any symbol in the set of symbols. In some examples, the reference signal processing configuration may configure UE 115 to identify that a first symbol in the set of symbols (such as symbols 705, 710, 715, and 720) and a second symbol in the set of symbols are associated with a time division orthogonal cover code. If a time division orthogonal cover code for two symbols is configured, UE 115 may identify a unique number of frequency resources scheduled for puncturing a first set of resources allocated to a demodulation reference signal. In some examples, the total number of frequency resources of the second set of frequency resources is based on the unique number of frequency resources. That is, UE 115 may identify a unique number of puncturing resources within symbols 705, 710, 715, and 720, where the total number of frequency resources of the second set of frequency resources is based on the sum of the unique number of frequency resources.

[0137] As described above, the reference signal processing configuration may indicate that all demodulation reference signal symbols (such as symbols 705, 710, 715, and 720) considered for processing the physical downlink shared channel may include at least one of the following: a set of symbols associated with the physical downlink shared channel in a time slot or a mini-slot, a set of symbols associated with multiple repetitions of the physical downlink shared channel in one or more time slots scheduled by the same downlink control indicator, a set of symbols associated with multiple physical downlink shared channels scheduled by a multi-time slot downlink control indicator, a set of symbols associated with multiple physical downlink shared channels in multiple time slots semi-persistently scheduled and activated by the same downlink control indicator, a set of physical downlink shared channel demodulation reference signals beamformed in the time domain, or a combination thereof. In some cases, the phase continuity of the reference signal associated with the physical downlink shared channel is configured for beamforming of the symbol set associated with the demodulation reference signal. In one example, the reference signal processing configuration may configure UE 115 to identify the punctured symbols in the symbol set and a subset of the remaining symbols in the symbol set after the punctured period. UE 115 may then beamform the subset of symbols based on the reference signal processing configuration indicating disabling beamforming in the punctured symbols. For example, the reference signal processing configuration may indicate that it is desired for UE 115 to stop beamforming at the punctured demodulation reference signal symbols and restart after the punctured symbols. For example, if the symbols in time slot 4 are punctured, it is desired for UE 115 to beamform time slots [1, 2, 3] and [5, 6, 7, 8], assuming beamforming is not enabled in time slot 4. Additionally or alternatively, the reference signal processing configuration may configure UE 115 to suppress time domain beamforming of the symbol set if one of these symbols is punctured.

[0138] According to one or more examples, the physical downlink shared channel may include a broadcast physical downlink shared channel or a unicast physical downlink shared channel. It can be understood that Figures 3 to 7The examples depicted may be applied separately to a broadcast physical downlink shared channel, a unicast physical downlink shared channel, or both. In some cases, the broadcast physical downlink shared channel may be scheduled with at least one of the following: a system information radio network temporary identifier, a random access radio network temporary identifier, a paging radio network temporary identifier, a temporary cell radio network temporary identifier, or a combination thereof. In some cases, the system information radio network temporary identifier may include a system information indicator set to a fixed value in a downlink control indicator. In some cases, the unicast physical downlink shared channel may be scheduled with at least one of the following: a physical downlink control channel including a cyclic redundancy check scrambled by at least one of a cell radio network temporary identifier, a modulation and coding scheme radio network temporary identifier, a configured scheduling radio network temporary identifier, a physical downlink shared channel with semi-persistent scheduling, or a combination thereof.

[0139] Figure 8 FIG. 800 is a block diagram illustrating a device 805 that supports physical downlink shared channel reference signal puncturing, in accordance with aspects of the present disclosure. The device 805 may be an example of aspects of a UE 115 as described herein. The device 805 may include a receiver 810, a communication manager 815, and a transmitter 820. The device 805 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

[0140] The receiver 810 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 physical downlink shared channel reference signal puncturing, etc.). The information may be passed to other components of the device 805. The receiver 810 may be an example of aspects of the transceiver 1120 described with reference to Figure 11 The receiver 810 may utilize a single antenna or an antenna array.

[0141] The communication manager 815 may receive a reference signal associated with a physical downlink shared channel from a base station; identify an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel for a set of time periods associated with the reference signal associated with the physical downlink shared channel; determine a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods based on the overlap; determine a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods based on a reference signal processing configuration; and process the reference signal in the subset of frequency resources based on the reference signal processing configuration. The communication manager 815 may be an example of aspects of the communication manager 1110 described herein. The actions performed by the communication manager 815 as described herein may be implemented to achieve one or more potential advantages. One implementation may allow the UE 115 to increase spectral efficiency by puncturing resources. Another implementation may provide improved quality of service and reliability at the UE 115, as latency may be reduced.

[0142] The communication manager 815 or its subcomponents may be implemented in hardware, 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 815 or its subcomponents may be performed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

[0143] The communication manager 815 or its subcomponents may be physically located in various positions, including being distributed such that portions of the functionality are implemented by one or more physical components in different physical locations. In some examples, in accordance with various aspects of the present disclosure, the communication manager 815 or its subcomponents may be separate and distinct components. In some examples, in accordance with various aspects of the present disclosure, the communication manager 815 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described herein, or a combination thereof.

[0144] The transmitter 820 may transmit signals generated by other components of the device 805. In some examples, the transmitter 820 may be co-located with the receiver 810 in a transceiver module. For example, the transmitter 820 may be an example of aspects of the transceiver 1120 described with reference to Figure 11 The transmitter 820 may utilize a single antenna or an antenna array.

[0145] Figure 9 FIG. 900 is a block diagram of a device 905 that supports physical downlink shared channel reference signal puncturing, in accordance with aspects of the present disclosure. The device 905 may be an example of aspects of the device 805 or UE 115 as described herein. The device 905 may include a receiver 910, a communication manager 915, and a transmitter 940. The device 905 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

[0146] The receiver 910 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, information related to physical downlink shared channel reference signal puncturing, etc.). The information may be passed to other components of the device 905. The receiver 910 may be an example of aspects of the transceiver 1120 described with reference to Figure 11 The receiver 910 may utilize a single antenna or an antenna array.

[0147] The communication manager 915 may be an example of aspects of the communication manager 815 as described herein. The communication manager 915 may include an overlap component 920, a frequency resource determination component 925, a reference signal processing configuration component 930, and a reference signal processing component 935. The communication manager 915 may be an example of aspects of the communication manager 1110 described herein.

[0148] The overlap component 920 may receive a reference signal associated with a physical downlink shared channel from a base station. The overlap component 920 may identify an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel, for a set of time periods associated with the reference signal associated with the physical downlink shared channel. The frequency resource determination component 925 may determine a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods based on the overlap. The reference signal processing configuration component 930 may determine a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods based on a reference signal processing configuration. The reference signal processing component 935 may process the reference signals in the subset of frequency resources based on the reference signal processing configuration.

[0149] In some examples, based on identifying an overlap between a first set of frequency resources allocated to a reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel, a processor of the UE 115 (e.g., controls the receiver 910, the transmitter 940, or as referenced Figure 11The described transceiver 1120) can efficiently determine a subset of frequency resources from a set of remaining frequency resources for each time period in the set of time periods based on a reference signal processing configuration. Additionally, a processor of UE 115 can process reference signals in the subset of frequency resources based on the reference signal processing configuration. The processor of UE 115 can turn on one or more processing units for processing reference signals, increase a processing clock, or similar mechanisms within UE 115. As such, when processing reference signals, the processor can be ready to respond more efficiently by reducing a ramp-up of processing power. The transmitter 940 can transmit signals generated by other components of device 905. In some examples, the transmitter 940 can be co-located in a transceiver module with the receiver 910. For example, the transmitter 940 can be an example of aspects of the transceiver 1120 described with reference to Figure 11 Aspects of the described transceiver 1120. The transmitter 940 can utilize a single antenna or an antenna array.

[0150] Figure 10 FIG. 1000 is a block diagram of a communication manager 1005 supporting physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure. The communication manager 1005 can be an example of aspects of the communication manager 815, the communication manager 915, or the communication manager 1110 described herein. The communication manager 1005 can include an overlap component 1010, a frequency resource determination component 1015, a reference signal processing configuration component 1020, a reference signal processing component 1025, a union component 1030, a discard component 1035, an inclusion component 1040, a precoded resource block group component 1045, a time period component 1050, and a bundling component 1055. Each of these modules can communicate directly or indirectly with each other (e.g., via one or more buses).

[0151] The overlap component 1010 can receive reference signals associated with a physical downlink shared channel from a base station. The overlap component 1010 can identify an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel for a set of time periods associated with the reference signals associated with the physical downlink shared channel. In some cases, the physical downlink shared channel includes a broadcast physical downlink shared channel or a unicast physical downlink shared channel. In some cases, the broadcast physical downlink shared channel is scheduled with at least one of: a system information radio network temporary identifier, a random access radio network temporary identifier, a paging radio network temporary identifier, a temporary cell radio network temporary identifier, or a combination thereof.

[0152] In some cases, the system information radio network temporary identifier includes a system information indicator set to a fixed value in the downlink control indicator. In some cases, the unicast physical downlink shared channel is scheduled with at least one of a physical downlink control channel including a cyclic redundancy check scrambled by one or more identifiers, a physical downlink shared channel with semi-persistent scheduling, or a combination thereof. In some cases, the one or more identifiers include at least one of the following: a cell radio network temporary identifier, a modulation and coding scheme radio network temporary identifier, a configured scheduling radio network temporary identifier. In some cases, the second frequency resource set includes a synchronization signal block resource or a rate matching resource or both. In some cases, the set of time periods associated with the reference signal includes a set of symbols. In some cases, the reference signal includes a demodulation reference signal.

[0153] The frequency resource determination component 1015 may determine a remaining frequency resource set from the first frequency resource set for each time period in the set of time periods based on the overlap. The reference signal processing configuration component 1020 may determine a frequency resource subset from the remaining frequency resource set for each time period in the set of time periods based on the reference signal processing configuration. In some examples, the reference signal processing configuration component 1020 may receive a signal indicating the reference signal processing configuration from a base station. The reference signal processing component 1025 may process the reference signal in the frequency resource subset based on the reference signal processing configuration.

[0154] In some examples, the overlap component 1010 may identify an overlap between a third frequency resource set allocated to the physical downlink shared channel and a second frequency resource set scheduled to puncture the third frequency resource set for a second set of time periods associated with the physical downlink shared channel. In some examples, the reference signal processing configuration component 1020 may determine a second frequency resource subset from the third frequency resource set for each time period in the second set of time periods based on the overlap between the third frequency resource set and the second frequency resource set, where the second frequency resource subset includes the frequency resources remaining in the third frequency resource set after rate matching around the second frequency resource set.

[0155] In some examples, the frequency resource determination component 1015 may identify a maximum common frequency resource subset across all time periods in the set of time periods from the remaining frequency resource set. The union component 1030 may identify a union of the second frequency resource subsets from the third frequency resource set across all time periods in the set of time periods, where the reference signal processing configuration indicates that the maximum common frequency resource subset is large enough to decode the physical downlink shared channel in the union of the second frequency resource subsets from the third frequency resource set.

[0156] The discarding component 1035 may discard, from the frequency resource subset, resource elements from the remaining frequency resource set that overlap with the second frequency resource set. In some examples, the discarding component 1035 may discard, from the frequency resource subset, resource blocks from the remaining frequency resource set that overlap with the second frequency resource set by at least one resource element. The incorporating component 1040 may include, in the frequency resource subset, resource blocks from the remaining frequency resource set that include at least one resource element that does not overlap with any resource element of the second frequency resource set.

[0157] The precoded resource block group component 1045 may identify that the precoded resource block group size for the first frequency resource set is configured as wideband. In some examples, the precoded resource block group component 1045 may assume that the precoded resource block group size is configured to be less than the default size of wideband. In some examples, the discarding component 1035 may discard, from the frequency resource subset, precoded resource block groups from the remaining frequency resource set that overlap with the second frequency resource set by at least one resource element.

[0158] In some examples, the precoded resource block group component 1045 may assume that the precoded resource block group size is configured to be the default size based on at least one of a radio resource control signal received from a base station, the capabilities associated with the UE, or a combination thereof. In some cases, the reference signal processing configuration indicates that the frequency resource subset includes the maximum common frequency resource subset across all time periods of the set of time periods.

[0159] In some cases, the precoded resource block group size for the first frequency resource set is configured as wideband, or the physical downlink shared channel is configured with a first frequency domain resource allocation type, and wherein the second frequency resource set includes resource element-level rate matching resources. In some examples, the discarding component 1035 may discard, from the frequency resource subset, resource blocks from the remaining frequency resource set that have resource elements overlapping with the resource element-level rate matching resources. In some examples, the discarding component 1035 may discard the set of resource elements from the frequency resource subset.

[0160] In some cases, the precoded resource block group size for the first frequency resource set is configured as wideband, or the physical downlink shared channel is configured with a first frequency domain resource allocation type, and wherein the reference signal processing configuration indicates that the frequency resource subset includes a number of frequency segments of coherent resource blocks that is less than or equal to a threshold. In some cases, the number of frequency segments is based on the maximum common frequency resource subset from the remaining frequency resource set across all time periods of the set of time periods. In some cases, the number of frequency segments is based on the frequency resource subset in each time period of the set of time periods.

[0161] In some cases, the reference signal processing configuration indicates that the total number of frequency resources in the second set of frequency resources is less than or equal to a threshold. In some cases, the total number of frequency resources in the second set of frequency resources corresponds to any time period in the set of time periods.

[0162] In some examples, the frequency resource determination component 1015 may identify the number of unique frequency resources in the first set of resources scheduled for puncturing and assigned to the reference signal in the first time period and the second time period, wherein the total number of frequency resources in the second set of frequency resources is based on the number of unique frequency resources. In some examples, the frequency resource determination component 1015 may identify the number of unique frequency resources in the first set of resources scheduled for puncturing and assigned to the reference signal in the set of time periods, wherein the total number of frequency resources in the second set of frequency resources is based on the number of unique frequency resources.

[0163] In some cases, the reference signal processing configuration indicates that the set of time periods associated with the reference signal includes at least one of the following: a set of time periods associated with a physical downlink shared channel in a time slot, a set of time periods associated with a repetition of a physical downlink shared channel in one or more time slots scheduled by the same downlink control indicator, a set of time periods associated with a plurality of physical downlink shared channels scheduled by a multi-time-slot downlink control indicator, a set of time periods associated with a plurality of physical downlink shared channels in a plurality of time slots semi-persistently scheduled and activated by the same downlink control indicator, or a combination thereof. In some cases, the phase continuity of the reference signal associated with the physical downlink shared channel is configured for time period bundling in the set of time periods associated with the reference signal.

[0164] The time period component 1050 may identify that the first time period in the set of time periods and the second time period in the set of time periods are associated with time division orthogonal cover codes. In some examples, the time period component 1050 may identify the punctured time periods in the set of time periods and a subset of the remaining time periods in the set of time periods after the punctured time periods. In some examples, the time period component 1050 may identify the punctured time periods in the set of time periods. The bundling component 1055 may bundle the subset of time periods based on the reference signal processing configuration, wherein the reference signal processing configuration indicates that bundling is disabled in the punctured time periods. In some examples, the bundling component 1055 may suppress bundling of the set of time periods based on the reference signal processing configuration.

[0165] In some cases, the first frequency resource set includes a first resource element in a set of resource elements associated with a time division orthogonal cover code or a frequency division orthogonal cover code, and wherein the second frequency resource set includes resource element level rate matching resources that overlap at least the first resource element in the set of resource elements. In some cases, the reference signal processing configuration indicates that a subset of frequency resources is consistent for each time period in the set of time periods. In some examples, the discard component 1035 may discard, based on an assumption that the precoded resource block group size is configured to a default size, precoded resource block groups from the remaining frequency resource set in the subset of frequency resources that overlap at least one resource element with the second frequency resource set.

[0166] Figure 11 FIG. shows a diagram of a system 1100 including a device 1105 that supports physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure. The device 1105 may be an example of a device 805, a device 905, or a UE 115 as described herein or include components of the device 805, the device 905, or the UE 115. The device 1105 may include components for bi-directional voice and data communication, which includes components for transmitting and receiving communication, including a communication manager 1110, an I / O controller 1115, a transceiver 1120, an antenna 1125, a memory 1130, and a processor 1140. These components may be in electronic communication via one or more busses, such as bus 1145.

[0167] The communication manager 1110 may receive a reference signal associated with a physical downlink shared channel from a base station; identify an overlap between a first frequency resource set assigned to the reference signal and a second frequency resource set that is scheduled to puncture the first resource set and is not available for scheduling on the physical downlink shared channel, for a set of time periods associated with the reference signal associated with the physical downlink shared channel; determine a remaining frequency resource set from the first frequency resource set for each time period in the set of time periods based on the overlap; determine a subset of frequency resources from the remaining frequency resource set for each time period in the set of time periods based on the reference signal processing configuration; and process the reference signal in the subset of frequency resources based on the reference signal processing configuration.

[0168] The I / O controller 1115 may manage input and output signals of the device 1105. The I / O controller 1115 may also manage peripheral devices not integrated into the device 1105. In some cases, the I / O controller 1115 may represent a physical connection or port to external peripheral devices. In some cases, the I / O controller 1115 may utilize an operating system, such as or another known operating system. In other cases, the I / O controller 1115 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, the I / O controller 1115 may be implemented as part of a processor. In some cases, the user may interact with the device 1105 via the I / O controller 1115 or via the hardware components controlled by the I / O controller 1115.

[0169] The transceiver 1120 may communicate bi-directionally via one or more antennas, wired or wireless links, as described herein. For example, the transceiver 1120 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1120 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna.

[0170] In some cases, the wireless device may include a single antenna 1125. However, in some cases, the device may have more than one antenna 1125, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

[0171] The memory 1130 may include random access memory (RAM) and read-only memory (ROM). The memory 1130 may store computer-readable, computer-executable code 1135 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 1130 may particularly include a basic input / output system (BIOS), which may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0172] The processor 1140 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1140 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 1140. The processor 1140 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1130) to cause the device 1105 to perform various functions (e.g., functions or tasks supporting physical downlink shared channel reference signal puncturing).

[0173] Code 1135 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communication. Code 1135 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some instances, code 1135 may not be directly executable by the processor 1140, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0174] Figure 12 FIG. 1200 is a block diagram illustrating a device 1205 that supports physical downlink shared channel reference signal puncturing, in accordance with aspects of the present disclosure. Device 1205 may be an example of aspects of a base station 105 as described herein. Device 1205 may include a receiver 1210, a communication manager 1215, and a transmitter 1220. Device 1205 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

[0175] The receiver 1210 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 physical downlink shared channel reference signal puncturing, etc.). The information may be passed to other components of device 1205. The receiver 1210 may be an example of aspects of the transceiver 1520 described with reference to Figure 15 The receiver 1210 may utilize a single antenna or an antenna array.

[0176] The communication manager 1215 may transmit to a UE a reference signal associated with a physical downlink shared channel; identify an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources that are used to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel, for a set of time periods associated with the reference signal associated with the physical downlink shared channel; determine, based on the overlap, a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods; determine, based on a reference signal processing configuration, a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods; and schedule the second set of frequency resources based on the reference signal processing configuration. The communication manager 1215 may be an example of aspects of the communication manager 1510 described herein. The actions performed by the communication manager 1215, as described herein, may be implemented to achieve one or more potential advantages. One implementation may allow the base station 105 to increase spectral efficiency by identifying an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources. Another implementation may provide improved quality of service and reliability at the base station 105, as latency may be reduced.

[0177] The communication manager 1215 or its sub-components may be implemented in hardware, 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 1215 or its sub-components may be performed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC), 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 in this disclosure.

[0178] The communication manager 1215 or its sub-components may be physically located at various positions, including being distributed such that portions of the functions are implemented by one or more physical components at different physical locations. In some examples, in accordance with various aspects of the present disclosure, the communication manager 1215 or its sub-components may be separate and distinct components. In some examples, in accordance with various aspects of the present disclosure, the communication manager 1215 or its sub-components may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or a combination thereof.

[0179] The transmitter 1220 may transmit signals generated by other components of the device 1205. In some examples, the transmitter 1220 may be co-located with the receiver 1210 in a transceiver module. For example, the transmitter 1220 may be an example of aspects of the transceiver 1520 described with reference to Figure 15 The transmitter 1220 may utilize a single antenna or an antenna array.

[0180] Figure 13 Block diagram 1300 of a device 1305 supporting physical downlink shared channel reference signal puncturing in accordance with various aspects of the present disclosure is shown. The device 1305 may be an example of aspects of the device 1205 or the base station 105 described herein. The device 1305 may include a receiver 1310, a communication manager 1315, and a transmitter 1340. The device 1305 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0181] The receiver 1310 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 physical downlink shared channel reference signal puncturing, etc.). The information may be passed to other components of the device 1305. The receiver 1310 may be an example of aspects of the transceiver 1520 described with reference to Figure 15 The receiver 1310 may utilize a single antenna or an antenna array.

[0182] Communication manager 1315 may be an example of aspects of communication manager 1215 as described herein. Communication manager 1315 may include an overlapping component 1320, a frequency resource determination component 1325, a reference signal processing configuration component 1330, and a scheduling component 1335. Communication manager 1315 may be an example of aspects of communication manager 1510 as described herein.

[0183] The overlapping component 1320 may transmit a reference signal associated with a physical downlink shared channel to a UE. The overlapping component 1320 may identify an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources that are scheduled to puncture the first set and are not available for scheduling on the physical downlink shared channel for a set of time periods associated with the reference signal associated with the physical downlink shared channel. The frequency resource determination component 1325 may determine a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods based on the overlap. The reference signal processing configuration component 1330 may determine a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods based on a reference signal processing configuration. The scheduling component 1335 may schedule the second set of frequency resources based on the reference signal processing configuration.

[0184] In some examples, based on identifying an overlap between a first set of frequency resources allocated to a reference signal and a second set of frequency resources that are scheduled to puncture the first set and are not available for scheduling on the physical downlink shared channel, a processor of base station 105 (e.g., control receiver 1310, transmitter 1340, or transceiver 1520 as described with reference Figure 15 to) may efficiently determine a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods based on the overlap. Additionally, the processor of base station 105 may determine a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods based on a reference signal processing configuration. The processor of base station 105 may turn on one or more processing units for determining the subset of frequency resources, increasing a processing clock, or similar mechanisms within base station 105. Thus, when the subset of frequency resources is determined, the processor may be ready to respond more efficiently by reducing a ramp-up of processing power. Transmitter 1340 may transmit signals generated by other components of device 1305. In some examples, transmitter 1340 may be co-located with receiver 1310 in a transceiver module. For example, transmitter 1340 may be an example of aspects of transceiver 1520 as described with reference Figure 15 to. Transmitter 1340 may utilize a single antenna or an antenna array.

[0185] Figure 14FIG. 1400 is a block diagram of a communication manager 1405 that supports physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure. The communication manager 1405 may be an example of aspects of the communication manager 1215, the communication manager 1315, or the communication manager 1510 described herein. The communication manager 1405 may include an overlap component 1410, a frequency resource determination component 1415, a reference signal processing configuration component 1420, a scheduling component 1425, a union component 1430, a precoded resource block group component 1435, and a configuration component 1440. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0186] The overlap component 1410 may transmit a reference signal associated with a physical downlink shared channel to a UE. The overlap component 1410 may identify an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources that are used to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel for a set of time periods associated with the reference signal associated with the physical downlink shared channel. The frequency resource determination component 1415 may determine a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods based on the overlap. The reference signal processing configuration component 1420 may determine a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods based on a reference signal processing configuration. The scheduling component 1425 may schedule the second set of frequency resources based on the reference signal processing configuration. In some cases, the reference signal includes a demodulation reference signal. In some cases, the second set of frequency resources includes a synchronization signal block resource or a rate matching resource or both. In some cases, the set of time periods associated with the reference signal includes a set of symbols.

[0187] In some examples, the reference signal processing configuration component 1420 may transmit a signal to the UE indicating the reference signal processing configuration. In some examples, the overlap component 1410 may identify an overlap between a third set of frequency resources allocated to the physical downlink shared channel and a second set of frequency resources that are scheduled to puncture the third set of frequency resources for a second set of time periods associated with the physical downlink shared channel. In some examples, the reference signal processing configuration component 1420 may determine a second subset of frequency resources from the third set of frequency resources for each time period in the second set of time periods based on the overlap between the third set of frequency resources and the second set of frequency resources, where the second subset of frequency resources includes the frequency resources remaining in the third set of frequency resources after rate matching around the second set of frequency resources.

[0188] In some examples, the frequency resource determination component 1415 may identify, from the remaining frequency resource set, a maximum common frequency resource subset across all time periods of the set of time periods. The union component 1430 may identify, across all time periods of the set of time periods, the union of a second frequency resource subset from a third frequency resource set, wherein the reference signal processing configuration indicates that the maximum common frequency resource subset is large enough to decode a physical downlink shared channel in the union of the second frequency resource subset from the third frequency resource set.

[0189] The precoding resource block group component 1435 may identify that the precoding resource block group size for a first frequency resource set is configured as wideband. In some examples, the precoding resource block group component 1435 may transmit a radio resource control signal to the UE indicating that the precoding resource block group size is configured to be less than the default size of wideband. In some cases, the precoding resource block group size for the first frequency resource set is configured as wideband, or the physical downlink shared channel is configured with a first frequency domain resource allocation type, and wherein the second frequency resource set includes resource element-level rate matching resources.

[0190] In some cases, the reference signal processing configuration indicates that the frequency resource subset includes the maximum common frequency resource subset across all time periods of the set of time periods. In some cases, the precoding resource block group size for the first frequency resource set is configured as wideband, or the physical downlink shared channel is configured with a first frequency domain resource allocation type, and wherein the reference signal processing configuration indicates that the frequency resource subset includes a number of frequency segments of coherent resource blocks that is less than or equal to a threshold.

[0191] In some cases, the first frequency resource set includes a first resource element in a set of resource elements associated with a time division orthogonal cover code or a frequency division orthogonal cover code, and wherein the second frequency resource set includes resource element-level rate matching resources that overlap at least the first resource element in the set of resource elements.

[0192] The configuration component 1440 may configure the phase continuity of a reference signal associated with the physical downlink shared channel for beamforming of time periods in a set of time periods associated with the reference signal. In some cases, the number of frequency segments is based on the maximum common frequency resource subset from the remaining frequency resource set across all time periods of the set of time periods. In some cases, the number of frequency segments is based on the frequency resource subset in each time period of the set of time periods.

[0193] In some cases, the reference signal processing configuration indicates that the subset of frequency resources is consistent for each time period in the set of time periods. In some cases, the reference signal processing configuration indicates that the total number of frequency resources in the second set of frequency resources is less than or equal to a threshold. In some cases, the total number of frequency resources in the second set of frequency resources corresponds to any time period in the set of time periods.

[0194] In some cases, the reference signal processing configuration indicates that the set of time periods associated with the reference signal includes at least one of the following: a set of time periods associated with a physical downlink shared channel in a time slot, a set of time periods associated with a repetition of a physical downlink shared channel in one or more time slots scheduled by the same downlink control indicator, a set of time periods associated with a plurality of physical downlink shared channels scheduled by a multi-time-slot downlink control indicator, a set of time periods associated with a plurality of physical downlink shared channels in a plurality of time slots semi-persistently scheduled and activated by the same downlink control indicator, or a combination thereof.

[0195] In some cases, the physical downlink shared channel includes a broadcast physical downlink shared channel or a unicast physical downlink shared channel. In some cases, the broadcast physical downlink shared channel is scheduled with at least one of the following: a system information radio network temporary identifier, a random access radio network temporary identifier, a paging radio network temporary identifier, a temporary cell radio network temporary identifier, or a combination thereof. In some cases, the system information radio network temporary identifier includes a system information indicator set to a fixed value in the downlink control indicator. In some cases, the unicast physical downlink shared channel is scheduled with at least one of a physical downlink control channel including a cyclic redundancy check scrambled by one or more identifiers, a physical downlink shared channel with semi-persistent scheduling, or a combination thereof. In some cases, the one or more identifiers include at least one of the following: a cell radio network temporary identifier, a modulation and coding scheme radio network temporary identifier, a configured scheduling radio network temporary identifier.

[0196] Figure 15FIG. 1500 shows a diagram of a system 1500 including a device 1505 that supports physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure. Device 1505 may be an example of device 1205, device 1305, or base station 105 as described herein or include components of the foregoing devices. Device 1505 may include components for two-way voice and data communication, including components for transmitting and receiving communication, including communication manager 1510, network communication manager 1515, transceiver 1520, antenna 1525, memory 1530, processor 1540, and inter-station communication manager 1545. These components may be in electronic communication via one or more buses (e.g., bus 1550).

[0197] The communication manager 1510 may transmit to a UE a reference signal associated with a physical downlink shared channel; identify an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources for puncturing the first set of resources and not available for scheduling on the physical downlink shared channel for a set of time periods associated with the reference signal associated with the physical downlink shared channel; determine a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods based on the overlap; determine a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods based on a reference signal processing configuration; and schedule the second set of frequency resources based on the reference signal processing configuration.

[0198] The network communication manager 1515 may manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 1515 may manage the delivery of data communication for client devices (such as one or more UEs 115).

[0199] The transceiver 1520 may communicate bi-directionally via one or more antennas, wired or wireless links, as described herein. For example, the transceiver 1520 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1520 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna.

[0200] In some instances, the wireless device may include a single antenna 1525. However, in some instances, the device may have more than one antenna 1525, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

[0201] Memory 1530 may include RAM, ROM, or a combination thereof. Memory 1530 may store computer-readable code 1535 including instructions that, when executed by a processor (e.g., processor 1540), cause the device to perform various functions described herein. In some cases, memory 1530 may particularly include BIOS, which may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0202] Processor 1540 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 1540 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into processor 1540. Processor 1540 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1530) to cause device 1505 to perform various functions (e.g., functions or tasks supporting physical downlink shared channel reference signal puncturing).

[0203] The inter-station communication manager 1545 may manage communication with other base stations 105 and may include a controller or scheduler for collaboratively controlling communication with UE 115 with other base stations 105. For example, the inter-station communication manager 1545 may coordinate the scheduling of transmissions to UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-station communication manager 1545 may provide an X2 interface within the LTE / LTE-A wireless communication network technology to provide communication between base stations 105.

[0204] Code 1535 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communication. Code 1535 may be stored on a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 1535 may not be directly executable by processor 1540, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0205] Figure 16 A flowchart illustrating a method 1600 for supporting physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure is shown. Operations of method 1600 may be implemented by UE 115 or its components as described herein. For example, operations of method 1600 may be implemented by referring to Figures 8 to 11be performed by the described communication manager. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the functions described herein. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described herein.

[0206] At 1605, the UE may receive a reference signal associated with a physical downlink control channel from a base station. The operation of 1605 may be performed according to the methods described herein. In some examples, aspects of the operation of 1605 may be performed by overlapping components as described with reference to Figures 8 to 11 the description.

[0207] At 1610, the UE may identify an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel, for a set of time periods associated with the reference signal associated with the physical downlink shared channel. The operation of 1610 may be performed according to the methods described herein. In some examples, aspects of the operation of 1610 may be performed by overlapping components as described with reference to Figures 8 to 11 the description.

[0208] At 1615, the UE may determine a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods based on the overlap. The operation of 1615 may be performed according to the methods described herein. In some examples, aspects of the operation of 1615 may be performed by a frequency resource determination component as described with reference to Figures 8 to 11 the description.

[0209] At 1620, the UE may determine a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods based on a reference signal processing configuration. The operation of 1620 may be performed according to the methods described herein. In some examples, aspects of the operation of 1620 may be performed by a reference signal processing configuration component as described with reference to Figures 8 to 11 the description.

[0210] At 1625, the UE may process the reference signal in the subset of frequency resources based on the reference signal processing configuration. The operation of 1625 may be performed according to the methods described herein. In some examples, aspects of the operation of 1625 may be performed by a reference signal processing component as described with reference to Figures 8 to 11 the description.

[0211] Figure 17FIG. 1700 is a flow chart illustrating a method 1700 for supporting physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure. Operations of method 1700 may be implemented by UE 115 or components thereof as described herein. For example, operations of method 1700 may be performed by a communication manager as described with reference to Figures 8 to 11 described. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the functions described herein. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described herein.

[0212] At 1705, the UE may receive a reference signal associated with a physical downlink control channel. The operation of 1705 may be performed in accordance with the methods described herein. In some examples, aspects of the operation of 1705 may be performed by an overlapping component as described with reference to Figures 8 to 11 described.

[0213] At 1710, the UE may identify an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on the physical downlink shared channel, for a set of time periods associated with the reference signal associated with the physical downlink shared channel. The operation of 1710 may be performed in accordance with the methods described herein. In some examples, aspects of the operation of 1710 may be performed by an overlapping component as described with reference to Figures 8 to 11 described.

[0214] At 1715, the UE may determine a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods based on the overlap. The operation of 1715 may be performed in accordance with the methods described herein. In some examples, aspects of the operation of 1715 may be performed by a frequency resource determination component as described with reference to Figures 8 to 11 described.

[0215] At 1720, the UE may determine a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods based on a reference signal processing configuration. The operation of 1720 may be performed in accordance with the methods described herein. In some examples, aspects of the operation of 1720 may be performed by a reference signal processing configuration component as described with reference to Figures 8 to 11 described.

[0216] In 1725, the UE may identify an overlap between a third set of frequency resources allocated to a physical downlink shared channel and a second set of frequency resources scheduled to puncture the third set of frequency resources for a second set of time periods associated with the physical downlink shared channel. The operations of 1725 may be performed according to the methods described herein. In some examples, aspects of the operations of 1725 may be performed by an overlap component as described with reference to Figures 8 to 11 The described overlap component.

[0217] In 1730, the UE may determine, for each time period in the second set of time periods, a second subset of frequency resources from the third set of frequency resources based on the overlap between the third set of frequency resources and the second set of frequency resources, where the second subset of frequency resources includes the frequency resources remaining in the third set of frequency resources after rate matching around the second set of frequency resources. The operations of 1730 may be performed according to the methods described herein. In some examples, aspects of the operations of 1730 may be performed by a frequency resource determination component as described with reference to Figures 8 to 11 The described frequency resource determination component.

[0218] In 1735, the UE may identify a maximum common subset of frequency resources across all time periods of the time period set from the remaining set of frequency resources. The operations of 1735 may be performed according to the methods described herein. In some examples, aspects of the operations of 1735 may be performed by a frequency resource determination component as described with reference to Figures 8 to 11 The described frequency resource determination component.

[0219] In 1740, the UE may process reference signals in the subset of frequency resources based on the identification. The operations of 1740 may be performed according to the methods described herein. In some examples, aspects of the operations of 1740 may be performed by a reference signal processing component as described with reference to Figures 8 to 11 The described reference signal processing component.

[0220] Figure 18 FIG. 1800 is a flow diagram illustrating a method 1800 for supporting physical downlink shared channel reference signal puncturing in accordance with aspects of the present disclosure. The operations of method 1800 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of method 1800 may be performed by a communication manager as described with reference to Figures 8 to 11 The described communication manager. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the functions described herein. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described herein.

[0221] In 1805, the UE may receive reference signals associated with a physical downlink control channel from a 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 by a reference signal receiving component as described with reference toFigures 8 to 11 performed by the overlapping components described.

[0222] In 1810, the UE may identify an overlap between a first set of frequency resources allocated to a reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and are not available for scheduling on a physical downlink shared channel, for a set of time periods associated with the reference signal related to the physical downlink shared channel. The operation of 1810 may be performed according to the method described herein. In some examples, aspects of the operation of 1810 may be performed by an overlapping component as referred to Figures 8 to 11 described.

[0223] In 1815, the UE may determine, for each time period in the set of time periods, a remaining set of frequency resources from the first set of frequency resources based on the overlap. The operation of 1815 may be performed according to the method described herein. In some examples, aspects of the operation of 1815 may be performed by a frequency resource determination component as referred to Figures 8 to 11 described.

[0224] In 1820, the UE may determine, for each time period in the set of time periods, a subset of frequency resources from the remaining set of frequency resources based on a reference signal processing configuration. The operation of 1820 may be performed according to the method described herein. In some examples, aspects of the operation of 1820 may be performed by a reference signal processing configuration component as referred to Figures 8 to 11 described.

[0225] In 1825, the UE may identify that the precoding resource block group size for the first set of frequency resources is configured as wideband. The operation of 1825 may be performed according to the method described herein. In some examples, aspects of the operation of 1825 may be performed by a precoding resource block group component as referred to Figures 8 to 11 described.

[0226] In 1830, the UE may assume that the precoding resource block group size is configured to be less than the default wideband size. The operation of 1830 may be performed according to the method described herein. In some examples, aspects of the operation of 1830 may be performed by a precoding resource block group component as referred to Figures 8 to 11 described.

[0227] In 1835, the UE may discard, from the subset of frequency resources, precoding resource block groups from the remaining set of frequency resources that overlap at least one resource element with the second set of frequency resources, based on the assumption that the precoding resource block group size is configured as the default size. The operation of 1835 may be performed according to the method described herein. In some examples, aspects of the operation of 1835 may be performed by a discarding component as referred to Figures 8 to 11 described.

[0228] At 1840, the UE may process the reference signals in the frequency resource subset based on the reference signal processing configuration. The operations of 1840 may be performed according to the methods described herein. In some examples, aspects of the operations of 1840 may be performed by a reference signal processing component as described with reference to Figures 8 to 11 the description.

[0229] Figure 19 FIG. 1900 is a flow chart illustrating a method for supporting reference signal puncturing for a physical downlink shared channel in accordance with aspects of the present disclosure. The operations of method 1900 may be implemented by a base station 105 or its components as described herein. For example, the operations of method 1900 may be performed by a communication manager as described with reference to Figures 12 to 15 the description. In some examples, the base station may execute an instruction set to control functional elements of the base station to perform the functions described herein. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described herein.

[0230] At 1905, the base station may transmit a reference signal associated with a physical downlink shared channel to the UE.

[0231] At 1910, the base station may identify an overlap between a first set of frequency resources allocated to the reference signal and a second set of frequency resources that are used for puncturing the first set of resources and are not available for scheduling on the physical downlink shared channel, for a set of time periods associated with the reference signal associated with the physical downlink shared channel. 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 by an overlap component as described with reference to Figures 12 to 15 the description.

[0232] At 1915, the base station may determine a remaining set of frequency resources from the first set of frequency resources for each time period in the set of time periods based on the overlap. 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 by a frequency resource determination component as described with reference to Figures 12 to 15 the description.

[0233] At 1920, the base station may determine a subset of frequency resources from the remaining set of frequency resources for each time period in the set of time periods based on the reference signal processing configuration. The operations of 1920 may be performed according to the methods described herein. In some examples, aspects of the operations of 1920 may be performed by a reference signal processing configuration component as described with reference to Figures 12 to 15 the description.

[0234] In 1925, the base station may schedule the second set of frequency resources based on the reference signal processing configuration. 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 by a scheduling component as described in reference to Figures 12 to 15 as described.

[0235] It should be noted that the methods described herein describe possible implementations, and the operations may be rearranged or otherwise modified and other implementations are possible. In addition, aspects from two or more methods may be combined.

[0236] The techniques described herein may be used in various wireless communication systems such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single-carrier frequency division multiple access (SC-FDMA), and other systems. CDMA systems may implement radio technologies such as CDMA2000, universal terrestrial radio access (UTRA), etc. CDMA2000 covers standards such as IS-2000, IS-95, and IS-856. The IS-2000 version is commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, high rate packet data (HRPD), etc. UTRA includes wideband CDMA (WCDMA) and other variants of CDMA. TDMA systems may implement radio technologies such as the global system for mobile communications (GSM).

[0237] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are UMTS versions that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from an organization called the "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization called the "3rd Generation Partnership Project 2" (3GPP2). The technologies described in this document can be used for the systems and radio technologies mentioned in this document, as well as for other systems and radio technologies. Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in most of the descriptions, the technologies described in this document can also be applied to applications outside of LTE, LTE-A, LTE-A Pro, or NR applications.

[0238] Macro cells generally cover a relatively large geographical area (e.g., with a radius of several kilometers) and may allow unconstrained access by UEs having a service subscription with the network provider. Small cells may be associated with a lower power base station (compared to macro cells), and small cells may operate in the same or different (e.g., licensed, unlicensed, etc.) frequency bands as macro cells. According to various examples, small cells may include picocells, femtocells, and microcells. Picocells, for example, may cover a smaller geographical area and may allow unconstrained access by UEs having a service subscription with the network provider. Femtocells may also cover a smaller geographical area (e.g., a residence) and may provide constrained access by UEs associated with the femtocell (e.g., UEs in a Closed Subscriber Group (CSG), UEs of users in the residence, etc.). The eNB for a macro cell may be referred to as a macro eNB. The eNB for a small cell may be referred to as a small cell eNB, pico eNB, femto eNB, or home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells and may also support communication using one or more component carriers.

[0239] The wireless communication systems described herein can support synchronous or asynchronous operations. For synchronous operations, each base station can have similar frame timing, and transmissions from different base stations can be approximately aligned in time. For asynchronous operations, each base station can have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein can be used for synchronous or asynchronous operations.

[0240] The information and signals described herein can be represented using any of a variety of different arts and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0241] The various illustrative blocks and modules described in connection with the disclosure herein can be implemented or executed with a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, microcontroller, or state machine. The processor can also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0242] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted via a computer-readable medium as one or more instructions or code. Other examples and implementations fall within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software, hardware, firmware, hardwired, or any combination thereof executed by a processor. The features implementing the functions can also be physically located in various positions, including being distributed such that portions of the functions are implemented at different physical locations.

[0243] A computer-readable medium includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer, or a general purpose or special purpose processor. Also, any connection is properly termed 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 microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks typically reproduce data magnetically and discs reproduce data optically with lasers. Combinations of the above media are also included within the scope of computer-readable media.

[0244] As used herein, including in the claims, the "or" used in a list of items (e.g., a list of items accompanied by language such as "at least one of" or "one or more of") indicates an inclusive listing such that, for example, the listing 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). Also, as used herein, the phrase "based on" should not be construed as reciting a closed set of conditions. For example, an exemplary operation described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0245] In the figures, like components or features may have the same reference numerals. Additionally, each of the same type of components may be distinguished by following the reference numeral with a dash and a second label that differentiates among the similar components. If only the first reference numeral is used in the specification, the description may apply to any one of the similar components having the same first reference numeral regardless of the second reference numeral, or any other subsequent reference numerals.

[0246] The description set forth herein with reference to the drawings describes exemplary configurations and does not represent all examples that may be implemented or that fall within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration" and does not mean "superior to" or "better than" other examples. This detailed description includes specific details to provide an understanding of the described techniques. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0247] The description provided herein is to enable a person skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled 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, comprising: Receiving, from a network device, a reference signal associated with a physical downlink shared channel; For each of a set of time periods associated with the reference signal associated with the physical downlink shared channel, identifying a respective overlap between a first set of frequency resources assigned to the reference signal and a second set of frequency resources scheduled to puncture the first set of frequency resources and unavailable for scheduling on the physical downlink shared channel, wherein in at least some configurations, at least one overlap is different from other overlaps in the respective overlap in terms of frequency resources; Determining, for each time period in the set of time periods, a respective remaining set of frequency resources from the first set of frequency resources based at least in part on the respective overlap; Determining, for each time period in the set of time periods, an intersection of the respective remaining sets of frequency resources as a subset of frequency resources based at least in part on a reference signal processing configuration, wherein the reference signal processing configuration indicates that the subset of frequency resources includes a maximum common subset of frequency resources across all time periods in the set of time periods; and Processing the reference signal in the subset of frequency resources based at least in part on the reference signal processing configuration.

2. The method of claim 1, wherein the reference signal processing configuration indicates that the subset of frequency resources is consistent for each time period in the set of time periods.

3. The method of claim 1, further comprising: Identifying an overlap between a third set of frequency resources assigned to the physical downlink shared channel and the second set of frequency resources scheduled to puncture the third set of frequency resources for a second set of time periods associated with the physical downlink shared channel; and Determining, for each time period in the second set of time periods, a second subset of frequency resources from the third set of frequency resources based at least in part on the overlap between the third set of frequency resources and the second set of frequency resources, wherein the second subset of frequency resources includes the frequency resources remaining in the third set of frequency resources after rate matching around the second set of frequency resources.

4. The method of claim 3, further comprising: Identifying a maximum common subset of frequency resources across all time periods in the set of time periods from the respective remaining sets of frequency resources; And Identifying, across all time periods in the set of time periods, a union of the second subsets of frequency resources from the third set of frequency resources, wherein the reference signal processing configuration indicates that the maximum common subset of frequency resources is large enough to decode the physical downlink shared channel in the union of the second subsets of frequency resources from the third set of frequency resources.

5. The method of claim 1, wherein determining the intersection of the respective remaining sets of frequency resources as the subset of frequency resources comprises: Discarding resource elements from the subset of frequency resources that overlap with the second set of frequency resources from the respective remaining sets of frequency resources.

6. The method according to claim 1, wherein determining the intersection of the respective remaining frequency resource sets as the frequency resource subset comprises: Discarding, from the frequency resource subset, resource blocks from the respective remaining frequency resource sets that overlap at least one resource element with the second frequency resource set.

7. The method according to claim 1, wherein determining the intersection of the respective remaining frequency resource sets as the frequency resource subset comprises: Including, in the frequency resource subset, resource blocks from the respective remaining frequency resource sets that include at least one resource element that does not overlap any resource element with the second frequency resource set.

8. The method according to claim 1, wherein determining the intersection of the respective remaining frequency resource sets as the frequency resource subset comprises: Discarding, from the frequency resource subset, groups of precoded resource blocks from the respective remaining frequency resource sets that overlap at least one resource element with the second frequency resource set.

9. The method according to claim 1, wherein determining the intersection of the respective remaining frequency resource sets as the frequency resource subset comprises: Identifying that the size of the group of precoded resource blocks for the first frequency resource set is configured as wideband; Assuming that the size of the group of precoded resource blocks is configured to be less than the default size for wideband; At least partially based on assuming that the size of the group of precoded resource blocks is configured as the default size, discarding, from the frequency resource subset, groups of precoded resource blocks from the respective remaining frequency resource sets that overlap at least one resource element with the second frequency resource set; And At least partially based on at least one of a radio resource control signal received from a network device, an ability associated with the user equipment, or a combination thereof, assuming that the size of the group of precoded resource blocks is configured as the default size.

10. The method according to claim 1, wherein the size of the group of precoded resource blocks for the first frequency resource set is configured as wideband, or the physical downlink shared channel is configured with a first frequency domain resource allocation type, and wherein the second frequency resource set includes resource element-level rate matching resources, and wherein determining the intersection of the respective remaining frequency resource sets as the frequency resource subset further comprises: Discarding, from the frequency resource subset, resource blocks from the respective remaining frequency resource sets that have resource elements overlapping with the resource element-level rate matching resources.

11. The method according to claim 1, wherein the first frequency resource set includes a first resource element in a set of resource elements associated with a time division orthogonal cover code or a frequency division orthogonal cover code, wherein the second frequency resource set includes resource element-level rate matching resources overlapping at least the first resource element in the set of resource elements, and wherein determining the intersection of the respective remaining frequency resource sets as the frequency resource subset further comprises: Discarding the set of resource elements from the frequency resource subset.

12. The method according to claim 1, wherein the precoding resource block group size for the first frequency resource set is configured as wideband, or the physical downlink shared channel is configured with a first frequency domain resource allocation type, and wherein the reference signal processing configuration indicates that the frequency resource subset includes a number of frequency segments less than or equal to a threshold of contiguous resource blocks.

13. The method according to claim 12, wherein the number of frequency segments is at least partially based on a maximum common frequency resource subset from the respective remaining frequency resource sets over all time periods of the set of time periods, or wherein the number of frequency segments is at least partially based on the frequency resource subsets in each time period of the set of time periods.

14. The method according to claim 1, wherein the reference signal processing configuration indicates that the total number of frequency resources of the second frequency resource set is less than or equal to a threshold.

15. The method according to claim 14, wherein the total number of frequency resources of the second frequency resource set corresponds to any time period in the set of time periods.

16. The method according to claim 14, further comprising: identifying a first time period in the set of time periods and a second time period in the set of time periods associated with a time division orthogonal cover code; and identifying, in the first time period and the second time period, a unique number of frequency resources of the first frequency resource set scheduled to be punctured for the reference signal, wherein the total number of frequency resources of the second frequency resource set is at least partially based on the unique number of frequency resources.

17. The method according to claim 14, further comprising: identifying, in the set of time periods, a unique number of frequency resources of the first frequency resource set scheduled to be punctured for the reference signal, wherein the total number of frequency resources of the second frequency resource set is at least partially based on the unique number of frequency resources.

18. The method according to claim 1, wherein the reference signal processing configuration indicates that the set of time periods associated with the reference signal includes at least one of the following: a set of time periods associated with the physical downlink shared channel in a time slot, a set of time periods associated with a repetition of the physical downlink shared channel in one or more time slots scheduled by the same downlink control indicator, a set of time periods associated with a plurality of physical downlink shared channels scheduled by a multi-time slot downlink control indicator, a set of time periods associated with a plurality of physical downlink shared channels in a plurality of time slots semi-persistently scheduled and activated by the same downlink control indicator, or a combination thereof.

19. The method according to claim 1, wherein: the phase continuity of the reference signal associated with the physical downlink shared channel is configured for beamforming of time periods in the set of time periods associated with the reference signal.

20. The method according to claim 19, wherein determining the intersection of the respective remaining frequency resource sets as the frequency resource subset further comprises: Identify the punctured time periods in the set of time periods and the subset of the remaining time periods in the set of time periods after the punctured time periods; and Cluster the subset of the time periods at least in part based on the reference signal processing configuration, where the reference signal processing configuration indicates that clustering is disabled during the punctured time periods.

21. The method according to claim 19, wherein determining the intersection of the respective remaining frequency resource sets as the subset of frequency resources further comprises: Identify the punctured time periods in the set of time periods; and Suppress clustering of the set of time periods at least in part based on the reference signal processing configuration.

22. The method according to claim 1, wherein the physical downlink shared channel comprises a broadcast physical downlink shared channel or a unicast physical downlink shared channel.

23. The method according to claim 22, wherein the broadcast physical downlink shared channel is scheduled with at least one of: a system information radio network temporary identifier, a random access radio network temporary identifier, a paging radio network temporary identifier, a temporary cell radio network temporary identifier, or a combination thereof, and wherein the system information radio network temporary identifier comprises a system information indicator set to a fixed value in a downlink control indicator.

24. The method according to claim 22, wherein the unicast physical downlink shared channel is scheduled with at least one of: a physical downlink control channel including a cyclic redundancy check scrambled by one or more identifiers, a physical downlink shared channel having semi-persistent scheduling, or a combination thereof, and wherein the one or more identifiers comprise at least one of: a cell radio network temporary identifier, a modulation and coding scheme radio network temporary identifier, a configured scheduling radio network temporary identifier.

25. The method according to claim 1, further comprising: Receiving a signal from a network device indicating the reference signal processing configuration.

26. The method according to claim 1, wherein the second frequency resource set comprises a synchronization signal block resource or a rate matching resource or both, and wherein the reference signal comprises a demodulation reference signal.

27. A method for wireless communication at a network device, comprising: Transmitting a reference signal associated with a physical downlink shared channel to a user equipment; For each of the set of time periods associated with the reference signal associated with the physical downlink shared channel, identify a respective overlap between a first frequency resource set allocated to the reference signal and a second frequency resource set used to puncture the first frequency resource set and not available for scheduling on the physical downlink shared channel, wherein in at least some configurations, at least one overlap is different from other overlaps in the respective overlap in terms of frequency resources; Determine a respective remaining frequency resource set from the first frequency resource set for each time period in the set of time periods at least in part based on the respective overlap; Determine the intersection of the corresponding remaining frequency resource sets as a frequency resource subset for each time period in the set of time periods, at least in part based on a reference signal processing configuration, where the reference signal processing configuration indicates that the frequency resource subset includes the largest common frequency resource subset across all time periods in the set of time periods; and Schedule the second frequency resource set, at least in part based on the reference signal processing configuration.

28. An apparatus for wireless communication at a user equipment, comprising: Means for identifying, for each of a set of time periods associated with a reference signal associated with a physical downlink shared channel, a corresponding overlap between a first frequency resource set allocated to the reference signal and a second frequency resource set scheduled to puncture the first frequency resource set and not available for scheduling on the physical downlink shared channel, wherein in at least some configurations, at least one overlap is different from other overlaps in the corresponding overlap in terms of frequency resources; Means for determining, for each time period in the set of time periods, a corresponding remaining frequency resource set from the first frequency resource set, at least in part based on the corresponding overlap; Means for determining, for each time period in the set of time periods, the intersection of the corresponding remaining frequency resource sets as a frequency resource subset, at least in part based on a reference signal processing configuration, where the reference signal processing configuration indicates that the frequency resource subset includes the largest common frequency resource subset across all time periods in the set of time periods; And Means for processing the reference signal in the frequency resource subset, at least in part based on the reference signal processing configuration.

29. An apparatus for wireless communication at a network device, comprising: Means for identifying, for each of a set of time periods associated with a reference signal associated with a physical downlink shared channel, a corresponding overlap between a first frequency resource set allocated to the reference signal and a second frequency resource set for puncturing the first frequency resource set and not available for scheduling on the physical downlink shared channel, wherein in at least some configurations, at least one overlap is different from other overlaps in the corresponding overlap in terms of frequency resources; Means for determining, for each time period in the set of time periods, a corresponding remaining frequency resource set from the first frequency resource set, at least in part based on the corresponding overlap; Means for determining, for each time period in the set of time periods, the intersection of the corresponding remaining frequency resource sets as a frequency resource subset, at least in part based on a reference signal processing configuration, where the reference signal processing configuration indicates that the frequency resource subset includes the largest common frequency resource subset across all time periods in the set of time periods; And Means for scheduling the second frequency resource set, at least in part based on the reference signal processing configuration.

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