Overlapping downlink control channel and cell-specific reference signal bandwidth

Abstract

Methods, systems, and devices for wireless communication are described. A user equipment (UE) receives a physical downlink control channel (PDCCH) configuration associated with a first radio access technology (RAT) for a first set of time-frequency resources including one or more control channel elements (CCEs). The UE receives a cell-specific reference signal (CRS) configuration associated with a second RAT, the CRS configuration for a second set of time-frequency resources overlapping with at least one CCE. And the UE receives a demodulation reference signal (DMRS) in a third set of time-frequency resources of the PDCCH according to the PDCCH configuration and the CRS configuration for a demodulation reference signal (DMRS) configuration identified by the third set of time-frequency resources of the PDCCH, the third set of time-frequency resources is included within the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

Description

[0001] Cross-references

[0002] This patent application claims the benefit of U.S. Provisional Patent Application No. 63 / 351,704, filed by TAKEDA et al. on June 13, 2022, and entitled “OVERLAPPINGDOWNLINK CONTROL CHANNEL AND CELL-SPECIFIC REFERENCE SIGNAL BANDWIDTHS”, and U.S. Patent Application No. 18 / 331,582, filed by TAKEDA et al. on June 8, 2023, and entitled “OVERLAPPINGDOWNLINK CONTROL CHANNEL AND CELL-SPECIFIC REFERENCE SIGNAL BANDWIDTHS”, each of which is assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0003] The following relates to wireless communications including overlapping downlink control channels and cell-specific reference signal (CRS) bandwidths. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems) and fifth generation (5G) systems (which may be referred to as new radio (NR) systems). These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations, each of which supports wireless communication for a communication device, which may be referred to as a user equipment (UE).

[0005] Different radio access technologies (RATs) such as 5G, NR, 4G, and LTE utilize different sets of resources to communicate different types of signals. In some cases, the resources used for different RATs may overlap with each other, resulting in conflicts that limit the ability of wireless devices to perform different types of signals. Summary of the invention

[0006] The described technology relates to improved methods, systems, devices and apparatuses that support overlapping downlink control channel and cell-specific reference signal (CRS) bandwidths. In general, aspects of the present disclosure support different rules or configurations that enable demodulation reference signals (DMRS) to be sent within physical downlink control channel (PDCCH) resources associated with a first radio access technology (RAT) when cell-specific reference signal (CRS) resources associated with a second radio access technology (RAT) overlap (e.g., puncture) with PDCCH resources. Specifically, aspects of the present disclosure support different DMRS configurations / modes that enable DMRS to be communicated on PDCCH resources of a first RAT (e.g., fifth generation (5G) or new radio (NR)) that do not overlap with CRS resources of a second RAT (e.g., fourth generation (4G) or long term evolution (LTE)). For example, a user equipment (UE) may receive a PDCCH configuration associated with a first RAT (e.g., 5G, NR) including a plurality of control channel elements (CCEs), and a CRS configuration associated with a second RAT (e.g., 4G, LTE) that at least partially overlaps with one of the CCEs. In this example, the UE may determine a DMRS configuration within the CCE based on the PDCCH configuration and the CRS configuration, and may receive a DMRS within the CCE of the PDCCH resource based on the determined DMRS configuration.

[0007] A method for wireless communication at a UE is described. The method may include: receiving first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being used for a first set of time-frequency resources including one or more CCEs; receiving second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being used for a second set of time-frequency resources at least partially overlapping with at least one CCE of the one or more CCEs; and receiving DMRS within a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for the downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included within the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0008] A device for wireless communication at a UE is described. The device may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the device to: receive a first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being used for a first set of time-frequency resources including one or more CCEs; receive a second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being used for a second set of time-frequency resources that at least partially overlaps with at least one CCE of the one or more CCEs; and receive a DMRS within a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0009] Another apparatus for wireless communication at a UE is described. The apparatus may include: a component for receiving a first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration for a first set of time-frequency resources including one or more CCEs; a component for receiving a second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration for a second set of time-frequency resources at least partially overlapping with at least one CCE of the one or more CCEs; and a component for receiving a DMRS within a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included within the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0010] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions that can be executed by a processor to perform the following operations: receiving a first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being used for a first set of time-frequency resources including one or more CCEs; receiving a second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being used for a second set of time-frequency resources that at least partially overlaps with at least one CCE of the one or more CCEs; and receiving a DMRS in a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for the downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more CCEs span at least a first symbol period and a second symbol period, the second set of time-frequency resources of the CRS configuration at least partially overlaps with a first portion of the one or more CCEs within the first symbol period, and the third set of time-frequency resources includes a second portion of the one or more CCEs within the second symbol period.

[0012] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the third set of time-frequency resources includes each time-frequency resource of the one or more CCEs within the second symbol period, and excludes each time-frequency resource of the one or more CCEs within the first symbol period based on the second set of time-frequency resources configured by the CRS overlapping with at least a portion of at least one CCE within the first symbol period.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more CCEs include a first CCE and a second CCE spanning at least a first symbol period and a second symbol period, the second set of time-frequency resources of the CRS configuration at least partially overlaps with a first portion of the first CCE in the first symbol period, and the third set of time-frequency resources includes the second CCE and a second portion of the first CCE within the second symbol period.

[0014] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more CCEs include CCEs comprising a first resource element group (REG) bundle and a second REG bundle spanning at least a first symbol period and a second symbol period, the second set of time-frequency resources of the CRS configuration at least partially overlaps with a first portion of the first REG bundle in the first symbol period, and the third set of time-frequency resources includes the second REG bundle and a second portion of the first REG bundle within the second symbol period.

[0015] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the second set of time-frequency resources of the CRS configuration overlaps with a first subset of the first portion of the first REG bundle in the first symbol period, and the third set of time-frequency resources also includes a second subset of the first portion of the first REG bundle in the first symbol period.

[0016] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: processing a signal received within the one or more CCEs, wherein the one or more CCEs include a first set of CCEs of a first type and a second set of CCEs of a second type, wherein the first set of CCEs of the first type at least partially overlaps with the second set of time-frequency resources configured by the CRS, and wherein the second set of CCEs of the second type does not overlap with the second set of time-frequency resources configured by the CRS, wherein receiving the DMRS may be based on the processing.

[0017] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for processing the signal received within a certain number of CCEs among the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the number of CCEs may be less than or equal to a threshold number of CCEs of the first type and the second type that can be processed by the UE.

[0018] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: processing the signal received within a first number of CCEs in the one or more CCEs during a monitoring opportunity, a time slot, or both, wherein the first number of CCEs may be less than or equal to a first threshold number of CCEs of the first type that may be processed by the UE; and processing the signal received within a second number of CCEs in the one or more CCEs during the monitoring opportunity, the time slot, or both, wherein the second number of CCEs may be less than or equal to a second threshold number of CCEs of the second type that may be processed by the UE.

[0019] Some examples of the methods, devices, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: processing signals received within the one or more CCEs, wherein the one or more CCEs include a first set of CCEs of a first type, a second set of CCEs of a second type, and a third set of CCEs of a third type, wherein the first set of the CCEs of the first type may have a first level of overlap with the second set of time-frequency resources configured by the CRS, wherein the second set of the CCEs of the second type may have a second level of overlap with the second set of time-frequency resources configured by the CRS, and wherein the third set of the CCEs of the third type does not overlap with the second set of time-frequency resources configured by the CRS, wherein receiving the DMRS may be based on the processing.

[0020] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, processing the signal may include operations, features, components, or instructions for processing the signal received within a certain number of CCEs among the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the number of CCEs may be less than or equal to a threshold number of CCEs of the first type, the second type, and the third type that can be processed by the UE.

[0021] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, processing the signal may include operations, features, components, or instructions for: processing the signal received within a first number of CCEs among the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the first number of CCEs may be less than or equal to a first threshold number of CCEs of the first type that may be processed by the UE; processing the signal received within a second number of CCEs among the one or more CCEs within the monitoring opportunity, the time slot, or both, wherein the second number of CCEs may be less than or equal to a second threshold number of CCEs of the second type that may be processed by the UE; and processing the signal received within a third number of CCEs among the one or more CCEs within the monitoring opportunity, the time slot, or both, wherein the third number of CCEs may be less than or equal to a third threshold number of CCEs of the third type that may be processed by the UE.

[0022] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, processing the signal may include operations, features, components, or instructions for: processing the signal received within a first number of CCEs among the one or more CCEs during a monitoring opportunity, a time slot, or both, wherein the first number of CCEs may be less than or equal to a first threshold number of CCEs of the first type and the second type that may be processed by the UE; and processing the signal received within a second number of CCEs among the one or more CCEs during the monitoring opportunity, the time slot, or both, wherein the second number of CCEs may be less than or equal to a second threshold number of CCEs of the second type that may be processed by the UE.

[0023] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving a downlink control message within a portion of the first set of time-frequency resources that does not include the second set of time-frequency resources and the third set of time-frequency resources.

[0024] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first RAT includes a 5G RAT, a NR access technology, or any combination thereof, and the second RAT includes a 4G RAT, a LTE RAT, or any combination thereof.

[0025] A method for wireless communication at a UE is described. The method may include: sending a first control signaling to the UE indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being used for a first set of time-frequency resources including one or more CCEs; sending a second control signaling to the UE indicating a CRS configuration associated with a second RAT, the CRS configuration being used for a second set of time-frequency resources at least partially overlapping with at least one CCE of the one or more CCEs; and sending a DMRS to the UE within a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for the downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0026] A device for wireless communication at a UE is described. The device may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the device to: send a first control signaling indicating a downlink control channel configuration associated with a first RAT to the UE, the downlink control channel configuration being used for a first set of time-frequency resources including one or more CCEs; send a second control signaling indicating a CRS configuration associated with a second RAT to the UE, the CRS configuration being used for a second set of time-frequency resources that at least partially overlaps with at least one CCE of the one or more CCEs; and send a DMRS to the UE within a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0027] Another apparatus for wireless communication at a UE is described. The apparatus may include: a component for sending a first control signaling to the UE indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs; a component for sending a second control signaling to the UE indicating a CRS configuration associated with a second RAT, the CRS configuration being for a second set of time-frequency resources at least partially overlapping with at least one of the one or more CCEs; and a component for sending a DMRS to the UE within a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included within the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0028] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions that can be executed by a processor to perform the following operations: sending a first control signaling indicating a downlink control channel configuration associated with a first RAT to the UE, the downlink control channel configuration being used for a first set of time-frequency resources including one or more CCEs; sending a second control signaling indicating a CRS configuration associated with a second RAT to the UE, the CRS configuration being used for a second set of time-frequency resources that at least partially overlaps with at least one CCE of the one or more CCEs; and sending a DMRS to the UE within a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for the downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0029] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more CCEs span at least a first symbol period and a second symbol period, the second set of time-frequency resources of the CRS configuration at least partially overlaps with a first portion of the one or more CCEs within the first symbol period, and the third set of time-frequency resources includes a second portion of the one or more CCEs within the second symbol period.

[0030] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the third set of time-frequency resources includes each time-frequency resource of the one or more CCEs within the second symbol period, and excludes each time-frequency resource of the one or more CCEs within the first symbol period based on the second set of time-frequency resources configured by the CRS overlapping with at least a portion of at least one CCE within the first symbol period.

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more CCEs include a first CCE and a second CCE spanning at least a first symbol period and a second symbol period, the second set of time-frequency resources of the CRS configuration at least partially overlaps with a first portion of the first CCE in the first symbol period, and the third set of time-frequency resources includes the second CCE and a second portion of the first CCE within the second symbol period.

[0032] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more CCEs include CCEs comprising a first REG bundle and a second REG bundle spanning at least a first symbol period and a second symbol period, the second set of time-frequency resources of the CRS configuration at least partially overlaps with a first portion of the first REG bundle in the first symbol period, and the third set of time-frequency resources includes the second REG bundle and a second portion of the first REG bundle within the second symbol period.

[0033] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the second set of time-frequency resources of the CRS configuration overlaps with a first subset of the first portion of the first REG bundle in the first symbol period, and the third set of time-frequency resources also includes a second subset of the first portion of the first REG bundle in the first symbol period.

[0034] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending a downlink control message to the UE within a portion of the first set of time-frequency resources that does not include the second set of time-frequency resources and the third set of time-frequency resources.

[0035] The features and technical advantages of examples according to the present disclosure have been outlined quite extensively above so that the following specific embodiments may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures for the same purpose of achieving the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and methods of operation) and the associated advantages will be better understood according to the following description. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and not as a definition of limitations to the claims.

[0036] Although various aspects and embodiments are described in this application by illustrating some examples, it will be understood by those skilled in the art that additional specific implementations and use cases can be generated in many different arrangements and scenarios. The innovation described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, each embodiment and / or use can be generated via an integrated chip embodiment and other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment, devices that enable artificial intelligence (AI), etc.). Although some examples may or may not specifically relate to use cases or applications, the innovation described may have various types of applicability. The scope of specific implementation can range from chip-level or module components to non-module, non-chip-level specific implementations, and further to aggregated, distributed or original equipment manufacturer (OEM) devices or systems in conjunction with one or more aspects of the described innovation. In some actual settings, the device in conjunction with the aspects and features must also include other components and features for the specific implementation and practice of the embodiments protected and described by the claims. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). The innovations described herein are intended to be practiced in a variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc., having different sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 An example of a wireless communication system supporting overlapping downlink control channel and cell-specific reference signal (CRS) bandwidth according to one or more aspects of the present disclosure is illustrated.

[0038] Figure 2 An example of a network architecture supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is illustrated.

[0039] Figure 3 An example of a wireless communication system supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is illustrated.

[0040] Figure 4-Figure 7 Example DMRS configurations supporting overlapping downlink control channel and CRS bandwidths according to one or more aspects of the present disclosure are illustrated.

[0041] Figure 8 An example of a process flow for supporting overlapping downlink control channels and CRS bandwidth in accordance with one or more aspects of the present disclosure is illustrated.

[0042] Fig. 9 and Fig.10 A block diagram of an apparatus supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is shown.

[0043] Fig.11 A block diagram of a communications manager supporting overlapping downlink control channels and CRS bandwidth is shown in accordance with one or more aspects of the present disclosure.

[0044] Fig.12 A diagram of a system including devices supporting overlapping downlink control channels and CRS bandwidth is shown in accordance with one or more aspects of the present disclosure.

[0045] Fig.13 and Fig.14 A block diagram of an apparatus supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is shown.

[0046] Fig.15 A block diagram of a communications manager supporting overlapping downlink control channels and CRS bandwidth is shown in accordance with one or more aspects of the present disclosure.

[0047] Fig.16 A diagram of a system including devices supporting overlapping downlink control channels and CRS bandwidth is shown in accordance with one or more aspects of the present disclosure.

[0048] Figures 17 to 19 A flow chart illustrating a method of supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0049] Some wireless communication systems may support one or more radio access technologies (RATs), such as a fifth generation (5G) RAT (e.g., a new radio (NR) access technology) or a fourth generation (4G) RAT (e.g., a long term evolution (LTE) RAT), or any combination thereof. Different RATs may utilize different sets of resources to convey different types of signals. For example, a 5G physical downlink control channel (PDCCH) resource may include a control resource set (CORESET) for transmitting 5G control signaling (including a demodulation reference signal (DMRS)). Similarly, an LTE RAT may utilize a set of resources for conveying a cell-specific reference signal (CRS). In some cases, the NR PDCCH bandwidth and the LTE CRS bandwidth may partially overlap with each other (e.g., the LTE CRS bandwidth "punctures" the NR PDCCH bandwidth). In such a case, other control signals such as DMRS cannot be sent in the PDCCH resources that overlap with the LTE CRS resources. Furthermore, in the case where the LTE CRS bandwidth punctures the NR PDCCH bandwidth, it is unclear whether (or to what extent) DMRS can be sent on other PDCCH resources that do not overlap with LTE CRS resources.

[0050] Therefore, various aspects of the present disclosure support different rules or configurations that enable DMRS to be sent within a PDCCH resource when the CRS resource overlaps (e.g., punctured) with a PDCCH resource. Specifically, various aspects of the present disclosure support different DMRS configurations / modes that enable DMRS to be communicated on a PDCCH resource associated with a first RAT (e.g., 5G, NR) that does not overlap with CRS resources associated with a second RAT (e.g., 4G, LTE). For example, a UE may receive a PDCCH configuration associated with a first RAT that includes a plurality of control channel elements (CCEs), and a CRS configuration associated with a second RAT that at least partially overlaps with one of the CCEs. In this example, the UE may determine a DMRS configuration within a CCE based on the PDCCH configuration and the CRS configuration, and may receive a DMRS within a CCE of a PDCCH resource based on the determined DMRS configuration. In other words, the identified DMRS configuration may enable the UE to receive DMRS within a PDCCH resource that does not overlap with a CRS resource.

[0051] In some aspects, the DMRS configuration may be determined within the PDCCH resources according to different granularities. In some cases, the DMRS configuration may include resources of CCEs within symbols (e.g., symbol periods) that do not include any LTE CRS resources (e.g., DMRS configuration per CORESET). In other cases, the DMRS configuration may include all resources of each CCE that does not overlap with LTE CRS resources (e.g., DMRS configuration per CCE). In other cases, the DMRS configuration may include all resources of each resource element group (REG) of the CCE that does not overlap with LTE CRS resources (e.g., DMRS configuration per REG).

[0052] Various aspects of the disclosure are first described in the context of a wireless communication system. Additional aspects of the disclosure are described in the context of an example network architecture, an example DMRS configuration, and an example process flow. Various aspects of the disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flow diagrams related to overlapping downlink control channels and CRS bandwidth.

[0053] Figure 1 An example of a wireless communication system 100 supporting overlapping downlink control channels and CRS bandwidths according to one or more aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an advanced LTE (LTE-A) network, an LTE-A Pro network, a new radio (NR) network, or a network operating according to other systems and radio technologies (including future systems and radio technologies not explicitly mentioned herein).

[0054] The network entities 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may include devices in different forms or with different capabilities. In various examples, the network entities 105 may be referred to as network elements, mobility elements, radio access network (RAN) nodes, or network equipment, among other names. In some examples, the network entities 105 and the UE 115 may communicate wirelessly via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, the network entity 105 may support a coverage area 110 (e.g., a geographic coverage area), and the UE 115 and the network entity 105 may establish one or more communication links 125 over the coverage area. The coverage area 110 may be an example of a geographic area, and the network entity 105 and the UE 115 may support signal communications over the geographic area according to one or more radio access technologies (RATs).

[0055] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be devices in different forms or with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. 1 . The UEs 115 described herein may be capable of supporting communication with various types of devices, such as Figure 1 Communicate with other UEs 115 or network entities 105) as shown.

[0056] As described herein, a node of the wireless communication system 100 (which may be referred to as a network node or a wireless node) may be a network entity 105 (e.g., any network entity described herein), a UE 115 (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, the node may be a UE 115. As another example, the node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In other aspects of this example, the first node, the second node, and the third node may be different relative to these examples. Similarly, references to UE 115, network entity 105, apparatus, device, computing system, etc. may include disclosure of UE 115, network entity 105, apparatus, device, computing system, etc. as nodes. For example, a disclosure that UE 115 is configured to receive information from network entity 105 also discloses that the first node is configured to receive information from a second node.

[0057] In some examples, the network entities 105 may communicate with the core network 130, or with each other, or both. For example, the network entities 105 may communicate with the core network 130 via one or more backhaul links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, the network entities 105 may communicate with each other directly (e.g., directly between the network entities 105) or indirectly (e.g., via the core network 130) via the backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols). In some examples, the network entities 105 may communicate with each other via midhaul communication links 162 (e.g., according to a midhaul interface protocol) or fronthaul communication links 168 (e.g., according to a fronthaul interface protocol) or any combination thereof. The backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., electrical links, optical fiber links), one or more wireless links (e.g., radio links, wireless optical links), and other examples or various combinations thereof. UE 115 may communicate with core network 130 via communication link 155 .

[0058] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a transceiver base station, a radio base station, an NR base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a 5G NB, a next generation eNB (ng-eNB), a Home Node B, a Home Evolved Node B, or other suitable terms). In some examples, the network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140).

[0059] In some examples, the network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that may be configured to utilize a protocol stack that is physically or logically distributed between two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN)). For example, the network entity 105 may include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (RIC) 175 (e.g., a near real-time RIC (near RT RIC), a non-real-time RIC (non-RT RIC)), a service management and orchestration (SMO) 180 system, or any combination thereof. The RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH), a remote radio unit (RRU), or a transmit receive point (TRP). One or more components of the network entity 105 in the decomposed RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 of the decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0060] The functional split between CU 160, DU 165, and RU 170 is flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combination thereof) are performed at CU 160, DU 165, and RU 170. For example, a functional split of a protocol stack may be employed between CU 160 and DU 165 such that CU 160 may support one or more layers of a protocol stack and DU 165 may support one or more different layers of a protocol stack. In some examples, CU 160 may host higher protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functionality and signaling (e.g., radio resource control (RRC), service data adaptation protocol (SDAP), packet data convergence protocol (PDCP)). The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally or alternatively, a functional split of the protocol stack may be employed between the DU 165 and the RU 170, such that the DU 165 may support one or more layers of the protocol stack, and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or more different cells (e.g., via one or more RUs 170). In some cases, the functional split between CU 160 and DU 165 or between DU 165 and RU 170 may be within the protocol layer (e.g., some functions of the protocol layer may be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer are performed by the other of CU 160, DU 165, or RU 170). CU 160 may be further functionally split into CU control plane (CU-CP) functions and CU user plane (CU-UP) functions. CU 160 may be connected to one or more DUs 165 via midhaul communication links 162 (e.g., F1, F1-c, F1-u), and DU 165 may be connected to one or more RUs 170 via fronthaul communication links 168 (e.g., open fronthaul (FH) interface). In some examples, midhaul communication link 162 or fronthaul communication link 168 may be implemented based on interfaces (eg, channels) between layers of a protocol stack supported by respective network entities 105 that communicate via those communication links.

[0061] In some wireless communication systems (e.g., wireless communication system 100), infrastructure and spectrum resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as donor entities or IAB donors. One or more DUs 165 or one or more RUs 170 may be controlled in part by one or more CUs 160 associated with a donor network entity 105 (e.g., a donor base station 140). One or more donor network entities 105 (e.g., IAB donors) may communicate with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120). The IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by a DU 165 of a coupled IAB donor. The IAB-MT may include an independent set of antennas for relaying communications with the UE 115, or may share the same antennas of the IAB node 104 (e.g., of the RU 170) for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the decomposed RAN architecture (e.g., one or more IAB nodes 104 or components of the IAB node 104) may be configured to operate according to the techniques described herein.

[0062] For example, an access network (AN) or RAN may include an access node (e.g., an IAB donor), communications between an IAB node 104, and one or more UEs 115. The IAB donor may facilitate a connection between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130). That is, the IAB donor may refer to a RAN node having a wired or wireless connection to the core network 130. The IAB donor may include a CU 160 and at least one DU 165 (e.g., and RU 170), wherein the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link). The IAB donor and the IAB node 104 may communicate via an F1 interface according to a protocol defining a signaling message (e.g., an F1 AP protocol). Additionally or alternatively, CU 160 may communicate with the core network via an interface (which may be an example of a portion of a backhaul link) and may communicate with other CUs 160 (e.g., CU 160 associated with an alternative IAB donor) via an Xn-C interface (which may be an example of a portion of a backhaul link).

[0063] An IAB node 104 may refer to a RAN node that provides IAB functionality (e.g., access for UE 115, wireless self-backhaul capabilities, etc.). DU 165 may act as a distributed scheduling node toward child nodes associated with IAB node 104, and IAB-MT may act as a scheduled node toward a parent node associated with IAB node 104. That is, an IAB donor may be referred to as a parent node that communicates with one or more child nodes (e.g., an IAB donor may relay for transmissions to UEs through one or more other IAB nodes 104). Additionally or alternatively, depending on the relay chain or configuration of the AN, an IAB node 104 may also be referred to as a parent node or child node of other IAB nodes 104. Thus, the IAB-MT entity of the IAB node 104 may provide a Uu interface for the child IAB node 104 to receive signaling from the parent IAB node 104 , and a DU interface (eg, DU 165 ) may provide a Uu interface for the parent IAB node 104 to signal to the child IAB node 104 or the UE 115 .

[0064] For example, the IAB node 104 may be referred to as a parent node supporting communications for a child IAB node or as a child IAB node associated with an IAB donor, or both. The IAB donor may include a CU 160 having a wired or wireless connection (e.g., backhaul communication link 120) to the core network 130, and may act as a parent node of the IAB node 104. For example, the DU 165 of the IAB donor may relay transmissions to the UE 115 via the IAB node 104, or may directly signal the transmissions to the UE 115, or both. The CU 160 of the IAB donor may signal the establishment of a communication link to the IAB node 104 via the F1 interface, and the IAB node 104 may schedule transmissions (e.g., transmissions relayed from the IAB donor to the UE 115) via the DU 165. That is, data may be relayed to and from the IAB node 104 via signaling via the NR Uu interface of the MT to the IAB node 104. Communications with the IAB node 104 may be scheduled by the DU 165 of the IAB donor, and communications with the IAB node 104 may be scheduled by the DU 165 of the IAB node 104 .

[0065] Where the techniques described herein are applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support overlapping downlink control channels and CRS bandwidths as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally or alternatively be performed by one or more components of the disaggregated RAN architecture (e.g., an IAB node 104, a DU 165, a CU 160, a RU 170, a RIC 175, a SMO 180).

[0066] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, among other examples. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or may be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, among other examples, which may be implemented in various objects such as appliances or vehicles, meters, and among other examples.

[0067] The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, and other examples, such as Figure 1 shown.

[0068] The UE 115 and the network entity 105 may wirelessly communicate with each other via one or more communication links 125 (e.g., access links) using resources associated with one or more carriers. The term "carrier" may refer to a collection of RF spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of an RF spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given RAT (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communications with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between a device and any portion (e.g., entity, sub-entity) of the network entity 105. For example, the terms "send," "receive," or "communicate" when referring to the network entity 105 may refer to any portion of the network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) of the RAN communicating with another device (e.g., directly or via one or more other network entities 105).

[0069] In some examples, such as in a carrier aggregation configuration, a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute RF Channel Number (EARFCN)) and may be identified according to a channel raster for discovery by UE 115. A carrier may operate in a standalone mode, in which case initial acquisition and connection may be made by UE 115 via the carrier, or a carrier may operate in a non-standalone mode, in which case a different carrier (e.g., of the same or different RAT) is used to anchor the connection.

[0070] The communication link 125 shown in the wireless communication system 100 may include downlink transmissions (e.g., forward link transmissions) from the network entity 105 to the UE 115, uplink transmissions (e.g., return link transmissions) from the UE 115 to the network entity 105, or both, among other transmission configurations. A carrier may carry either downlink communications or uplink communications (e.g., in an FDD mode), or may be configured to carry both downlink communications and uplink communications (e.g., in a TDD mode).

[0071] A carrier may be associated with a particular bandwidth of the RF spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a set of bandwidths for a carrier for a particular RAT (e.g., 1.4 megahertz (MHz), 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, 40 MHz, or 80 MHz). A device of the wireless communication system 100 (e.g., a network entity 105, a UE 115, or both) may have a hardware configuration that supports communications using a particular carrier bandwidth or may be capable of being configured to support communications using one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a network entity 105 or a UE 115 that supports concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate using a portion (e.g., a subband, a BWP) or all of a carrier bandwidth.

[0072] The signal waveform transmitted via the carrier wave may be composed of 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)). In a system using MCM techniques, a resource element may refer to a resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, in which case the symbol period and the subcarrier spacing may be inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both), so that a relatively high number of resource elements (e.g., in the transmission duration) and a relatively high order modulation scheme may correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of RF spectrum resources, time resources, and spatial resources (e.g., spatial layers, beams), and the use of multiple spatial resources may increase the data rate or data integrity of the communication with the UE 115.

[0073] One or more parameter sets for a carrier may be supported, and the parameter sets may include subcarrier spacing (Δf) and cyclic prefixes. A carrier may be divided into one or more BWPs with the same or different parameter sets. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications of a UE 115 may be constrained to one or more active BWPs.

[0074] The time interval for the network entity 105 or the UE 115 may be expressed as a multiple of a basic time unit, which may be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, where Δf max It can represent the supported subcarrier spacing, and N f The supported discrete Fourier transform (DFT) size may be indicated. The time intervals of the communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0075] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, the frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into multiple time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include multiple symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). In some wireless communication systems 100, the time slot may also be divided into multiple mini time slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0076] A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0077] Physical channels may be multiplexed using carriers for communication according to various techniques. For example, physical control channels and physical data channels may be multiplexed via downlink carriers for signaling using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a set of symbol periods and may extend across a system bandwidth or a subset of a system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more UEs in UE 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of a control channel candidate may refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to a plurality of UEs 115 , and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0078] In some examples, the network entities 105 (e.g., base stations 140, RUs 170) may be mobile and thus provide communication coverage for mobile coverage areas 110. In some examples, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other examples, overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.

[0079] The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). The UE 115 may be designed to support ultra-reliable or low-latency or critical functions. Ultra-reliable communication may include private communication or group communication, and may be supported by one or more services (such as push-to-talk, video, or data). Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety applications or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency are used interchangeably herein.

[0080] In some examples, a UE 115 may be configured to support communication directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 in a group that are performing D2D communication may be within a coverage area 110 of a network entity 105 (e.g., a base station 140, a RU 170), which may support various aspects of such D2D communication configured (e.g., scheduled) by the network entity 105. In some examples, one or more UEs 115 of such a group may be outside of the coverage area 110 of the network entity 105, or may otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system, in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, network entity 105 may facilitate scheduling of resources for D2D communications. In some other examples, D2D communications may be conducted between UEs 115 without involving network entity 105.

[0081] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these items. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units), or communicate with the network via one or more network nodes (e.g., network entity 105, base station 140, RU 170) using vehicle-to-network (V2N) communication, or both.

[0082] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity for managing access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity for routing packets or interconnecting to an external network (e.g., a serving gateway (S-GW)), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for UE 115 served by a network entity 105 (e.g., a base station 140) associated with the core network 130. User IP packets may be delivered via the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to an IP service 150 for one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0083] The wireless communication system 100 may operate using one or more frequency bands that may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelength range is approximately one decimeter to one meter. UHF waves may be blocked or redirected by buildings and environmental features (which may be referred to as clusters), but these waves may be sufficient to penetrate structures so that macro cells provide services to UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to communications using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0084] The wireless communication system 100 may utilize both licensed RF spectrum bands and unlicensed RF spectrum bands. For example, the wireless communication system 100 may employ licensed assisted access (LAA), LTE-unlicensed (LTE-U) RAT, or NR technology using unlicensed bands (such as, 5GHz Industrial, Scientific and Medical (ISM) band). When operating using unlicensed RF spectrum bands, devices such as network entity 105 and UE 115 may employ carrier sensing for conflict detection and avoidance. In some examples, operations using unlicensed bands may be based on carrier aggregation configuration in combination with component carriers operating using licensed bands (e.g., LAA). Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, as well as other examples.

[0085] The network entity 105 (e.g., base station 140, RU 170) or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of the network entity 105 or UE 115 may be located in one or more antenna arrays or antenna panels that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with the network entity 105 may be located at different geographical locations. The network entity 105 may include an antenna array having a set of rows and columns of antenna ports that the network entity 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may include one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming for signals sent via the antenna ports.

[0086] The network entity 105 or UE 115 may use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such technology may be referred to as spatial multiplexing. Multiple signals may be, for example, sent by a transmitting device via different antennas or different combinations of antennas. Similarly, multiple signals may be received by a receiving device 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 information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technologies include single-user MIMO (SU-MIMO), in which multiple spatial layers are sent to the same receiving device; and multi-user MIMO (MU-MIMO), in which multiple spatial layers are sent to multiple devices.

[0087] 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., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals conveyed via antenna elements of an antenna array so that some signals propagating along a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals conveyed via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of the antenna elements 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).

[0088] The network entity 105 or UE 115 may use beam scanning techniques as part of a beamforming operation. For example, the network entity 105 (e.g., base station 140, RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the network entity 105 along different directions. For example, the network entity 105 may send signals according to different sets of beamforming weights associated with different transmission directions. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device (such as network entity 105), or by a receiving device (such as UE 115)) beam directions for later transmission or reception by the network entity 105.

[0089] Some signals, such as data signals associated with a particular receiving device, may be sent by a transmitting device (e.g., transmitting network entity 105, transmitting UE 115) along a single beam direction (e.g., a direction associated with a receiving device (such as receiving network entity 105 or receiving UE 115)). In some examples, a beam direction associated with transmission along a single beam direction may be determined based on signals sent along one or more beam directions. For example, UE 115 may receive one or more of the signals sent by network entity 105 along different directions, and may report to network entity 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0090] In some examples, transmission by a device (e.g., by network entity 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from network entity 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more subbands. Network entity 105 may send a reference signal (e.g., CRS, channel state information reference signal (CSI-RS)), which may be precoded or unprecoded. UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel codebook, a linear combination codebook, a port selection codebook). Although these techniques are described with reference to signals sent along one or more directions by a network entity 105 (e.g., base station 140, RU 170), UE 115 may use similar techniques to send signals multiple times along different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115), or to send signals along a single direction (e.g., to send data to a receiving device).

[0091] A receiving device (e.g., UE 115) may perform receiving operations according to multiple receiving configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a receiving device (e.g., network entity 105). For example, the receiving device may perform reception according to multiple receiving directions by: receiving via different antenna subarrays, processing the received signals according to different antenna subarrays, receiving according to different receiving beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or processing the received signals according to different receiving beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0092] The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication at the bearer or PDCP layer may be IP-based. The RLC layer may perform packet segmentation and reassembly to communicate via logical channels. The MAC layer may perform priority processing and multiplexing of logical channels to transport channels. The MAC layer may also implement error detection techniques, error correction techniques, or both to support retransmission to improve link efficiency. In the control plane, the RRC layer may provide the establishment, configuration, and maintenance of an RRC connection that supports a radio bearer for user plane data between the UE 115 and the network entity 105 or the core network 130. The PHY layer may map a transport channel to a physical channel.

[0093] UE 115 and network entity 105 may support retransmission of data to increase the likelihood that the data is successfully received. Hybrid automatic repeat request (HARQ) feedback is a technique for increasing the likelihood of correctly receiving data via a communication link (e.g., communication link 125, D2D communication link 135). HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific time slot for data received in a previous symbol in the time slot. In some other examples, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0094] In some implementations, the wireless communication system 100 may support different rules or configurations that enable DMRS to be sent within PDCCH resources when the CRS resources overlap (e.g., punctured) with the PDCCH resources. Specifically, aspects of the present disclosure support different DMRS configurations that enable DMRS to be communicated on PDCCH resources associated with a first RAT (e.g., 5G, NR) that do not overlap with CRS resources associated with a second RAT (e.g., 4G, LTE).

[0095] For example, a UE 115 of the wireless communication system 100 may receive a PDCCH configuration associated with a first RAT including a plurality of CCEs, and a CRS configuration associated with a second RAT that at least partially overlaps one of the CCEs. In this example, the UE 115 may determine a DMRS configuration within the CCE based on the PDCCH configuration and the CRS configuration, and may receive a DMRS within the CCE of the PDCCH resource based on the determined DMRS configuration. In other words, the identified DMRS configuration may enable the UE 115 to receive a DMRS within a PDCCH resource that does not overlap with a CRS resource.

[0096] In some aspects, the DMRS configuration may be determined within the PDCCH resources according to different granularities. In some cases, the DMRS configuration may include resources of CCEs within symbols (e.g., symbol periods) that do not include any LTE CRS resources (e.g., DMRS configuration per CORESET). In other cases, the DMRS configuration may include all resources of each CCE that does not overlap with LTE CRS resources (e.g., DMRS configuration per CCE). In other cases, the DMRS configuration may include all resources of each REG of CCEs that do not overlap with LTE CRS resources (e.g., DMRS configuration per REG).

[0097] The techniques described herein may enable the communication of DMRS within PDCCH resources that at least partially overlap with CRS resources. Specifically, in a case where PDCCH resources associated with a first RAT (e.g., 5G, NR) are "punctured" by CRS resources associated with a second RAT (e.g., 4G, LTE), various aspects of the present disclosure may enable the transmission of DMRS within the PDCCH resources. In this regard, even in the case where the PDCCH resources conflict (e.g., overlap) with resources of a different RAT, various aspects of the present disclosure may retain the use of PDCCH resources, thereby facilitating the communication of DMRS and improving resource utilization within the wireless communication system 100. Therefore, by facilitating the communication of DMRS, various aspects of the present disclosure may improve the reliability and efficiency of wireless communications within the wireless communication system 100.

[0098] Figure 2An example of a network architecture 200 (e.g., a decomposed base station architecture, a decomposed RAN architecture) supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is illustrated. The network architecture 200 may illustrate an example for implementing one or more aspects of the wireless communication system 100. The network architecture 200 may include one or more CUs 160-a, which may communicate directly with the core network 130-a via a backhaul communication link 120-a, or indirectly communicate with the core network 130-a through one or more decomposed network entities 105 (e.g., a near RT RIC 175-b via an E2 link, or a non-RT RIC 175-a associated with an SMO 180-a (e.g., an SMO framework), or both. The CU 160-a may communicate with one or more DUs 165-a via corresponding midhaul communication links 162-a (e.g., an F1 interface). The DU 165-a may communicate with one or more RUs 170-a via corresponding fronthaul communication links 168-a. The RUs 170-a may be associated with respective coverage areas 110-a and may communicate with the UEs 115-a via one or more communication links 125-a. In some implementations, a UE 115-a may be simultaneously served by multiple RUs 170-a.

[0099] Each of the network entities 105 of the network architecture 200 (e.g., CU 160-a, DU 165-a, RU 170-a, non-RT RIC 175-a, near-RT RIC 175-b, SMO 180-a, open cloud (O-Cloud) 205, open eNB (O-eNB) 210) may include one or more interfaces or may be coupled to one or more interfaces configured to receive or send signals (e.g., data, information) via a wired or wireless transmission medium. Each network entity 105 or an associated processor (e.g., a controller) that provides instructions to an interface of the network entity 105 may be configured to communicate with one or more of the other network entities 105 via a transmission medium. For example, these network entities 105 may include a wired interface that is configured to receive signals on a wired transmission medium or to send signals to one or more of the other network entities 105 on a wired transmission medium. Additionally or alternatively, the network entity 105 may include a wireless interface, which may include a receiver, transmitter, or transceiver (e.g., an RF transceiver) configured to receive signals on a wireless transmission medium, or to send signals to one or more of the other network entities 105 on a wireless transmission medium, or both.

[0100] In some examples, CU 160-a may host one or more higher layer control functions. Such control functions may include RRC, PDCP, SDAP, etc. Each control function may be implemented with an interface configured to communicate signals with other control functions hosted by CU 160-a. CU 160-a may be configured to handle user plane functionality (e.g., CU-UP), control plane functionality (e.g., CU-CP), or a combination thereof. In some examples, CU 160-a may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 160-a may be implemented to communicate with DU 165-a for network control and signaling.

[0101] DU 165-a may correspond to a logical unit that includes one or more functions (e.g., base station functions, RAN functions) for controlling the operation of one or more RUs 170-a. In some examples, DU 165-a may at least partially host one or more of the RLC layer, the MAC layer, and one or more aspects of the PHY layer (e.g., a high PHY layer, such as modules for FEC encoding and decoding, scrambling, modulation and demodulation, etc.), which depends at least in part on functional divisions, such as those defined by the Third Generation Partnership Project (3GPP). In some examples, DU 165-a may also host one or more low PHY layers. Each layer may be implemented with an interface that is configured to communicate signals with other layers hosted by DU 165-a or with control functions hosted by CU160-a.

[0102] In some examples, lower layer functionality may be implemented by one or more RUs 170-a. For example, a RU 170-a controlled by a DU 165-a may correspond to a logical node that hosts RF processing functions or low PHY layer functions (e.g., performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.) or both based at least in part on functional splitting (such as lower layer functional splitting). In this architecture, RU 170-a may be implemented to handle over-the-air (OTA) communications with one or more UEs 115-a. In some specific implementations, real-time and non-real-time aspects of control plane and user plane communications with RU 170-a may be controlled by the corresponding DU 165-a. In some examples, this configuration may enable DU 165-a and CU 160-a to be implemented in a cloud-based RAN architecture (such as a vRAN architecture).

[0103] The SMO 180-a may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network entities 105. For non-virtualized network entities 105, the SMO 180-a may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (e.g., an O1 interface). For virtualized network entities 105, the SMO 180-a may be configured to interact with a cloud computing platform (e.g., O-Cloud 205) via a cloud computing platform interface (e.g., an O2 interface) to perform network entity lifecycle management (e.g., to instantiate virtualized network entities 105). Such virtualized network entities 105 may include, but are not limited to, CU 160-a, DU 165-a, RU 170-a, and near-RT RIC 175-b. In some specific implementations, the SMO 180-a may communicate with components configured according to a 4G RAN (e.g., via an O1 interface). Additionally or alternatively, in some implementations, the SMO 180-a may communicate directly with one or more RUs 170-a via an O1 interface. The SMO 180-a may also include a non-RT RIC 175-a configured to support the functionality of the SMO 180-a.

[0104] The non-RT RIC 175-a may be configured to include logic functions that implement non-real-time control and optimization of RAN elements and resources, artificial intelligence (AI) or machine learning (ML) workflows (including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 175-b). The non-RT RIC 175-a may be coupled to or communicate with the near-RT RIC 175-b (e.g., via an A1 interface). The near-RT RIC 175-b may be configured to include logic functions that implement near real-time control and optimization of RAN elements and resources via data collection and actions on an interface connecting one or more CUs 160-a, one or more DUs 165-a, or both, and the O-eNB 210 to the near-RT RIC 175-b (e.g., via an E2 interface).

[0105] In some examples, in order to generate an AI / ML model to be deployed in the near-RT RIC 175-b, the non-RT RIC 175-a may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 175-b and may be received from a non-network data source or from a network function at the SMO 180-a or the non-RT RIC 175-a. In some examples, the non-RT RIC 175-a or the near-RT RIC 175-b may be configured to tune RAN behavior or performance. For example, the non-RT RIC 175-a may monitor long-term trends and patterns of performance and employ an AI model or ML model to perform corrective actions through the SMO 180-a (e.g., via reconfiguration of O1) or via the generation of a RAN management policy (such as an A1 policy).

[0106] Figure 3 An example of a wireless communication system 300 that supports overlapping downlink control channels and CRS bandwidths according to one or more aspects of the present disclosure is illustrated. In some examples, aspects of the wireless communication system 300 may implement or be implemented by aspects of the wireless communication system 100, the network architecture 200, or both. Specifically, as described with respect to Figure 1 As described, the wireless communication system 300 may support different rules or configurations that enable DMRS to be sent within PDCCH resources when CRS resources overlap (eg, are punctured) with PDCCH resources.

[0107] The wireless communication system 300 may include a network entity 105-a and a UE 115-a. The UE 115-a may communicate with the network entity 105-a using a communication link 305, which may be an example of an NR or LTE link between the respective UE 115-a and the network entity 105-a. In some cases, the communication link 305 may include an example of an access link (e.g., a Uu link), which may include a bidirectional link that implements both uplink and downlink communications. For example, the UE 115-a may use the communication link 305 to send an uplink signal, such as an uplink control signal or an uplink data signal, to one or more components of the network entity 105-a, and one or more components of the network entity 105-a may use the communication link 305 to send a downlink signal, such as a downlink control signal or a downlink data signal, to the UE 115-a.

[0108] In some implementations, the wireless communication system 300 may support wireless communication via one or more different RATs (including but not limited to 5G, NR, 4G, and LTE). In other words, the wireless communication system 300 may support coexistence of 5G / NR communications and 4G / LTE communications. As previously mentioned herein, different RATs may utilize different sets of resources to convey different types of signals.

[0109] For example, NR PDCCH resources may include a CORESET for conveying 5G control signaling (including DMRS). In the context of NR PDCCH configuration, PDCCH resources may be divided into resources of different granularities. Specifically, NR PDCCH may be formed by one or more CCEs (e.g., including one or more CCEs), wherein the CCE is formed by one or more REG clusters (REGb) (e.g., including one or more REG clusters). In addition, REG clusters (REGb) may be formed by one or more REGs that are continuous in time, in frequency, or in both time and frequency (e.g., including one or more REGs), wherein the REG includes resources spanning one resource block and one OFDM symbol (e.g., one OFDM symbol period). In each REG, DMRS may be sent in a subset of resource elements. For example, in each REG, DMRS resource elements may include resource elements #1, #5, and #9 (e.g., DMRS may be sent on resource elements #1, #5, and #9). It may be assumed that the precoder used for DMRS is the same within a REG bundle or within a set of consecutive resource blocks in a CORESET.

[0110] The PDCCH configuration may present a non-interleaved CCE to REG mapping configuration or an interleaved CCE to REG mapping configuration. A non-interleaved mapping configuration may include one or more CCEs, each CCE including a set of multiple REGs that are continuous in the frequency domain. In contrast, an interleaved mapping configuration may include a CCE that includes multiple REGs that are discontinuous (e.g., separated from each other) in the frequency domain. Figure 4 – Figure 7 Interleaved and non-interleaved CCE-to-REG mapping configurations are shown and described in more detail.

[0111] The coexistence of multiple RATs within a wireless communication system may result in conflicts when the resource sets for the respective RATs overlap with each other. For example, in some cases, the PDCCH resources associated with the first RAT (e.g., 5G, NR) may partially overlap with the CRS resources of the second RAT (e.g., 4G, LTE). In other words, the LTE CRS resources may "puncture" the NR PDCCH resources. In such a case, other control signals such as DMRS cannot be sent in the PDCCH resources that overlap with the CRS resources. In addition, in the case where the CRS resources puncture the PDCCH resources, it may not be clear whether (or to what extent) DMRS can be sent on other PDCCH resources that do not overlap with the CRS resources.

[0112] Thus, the wireless communication system 300 may support different rules or configurations that enable transmission of DMRS 325 within PDCCH resources 330 when CRS resources 340 overlap (e.g., punctured) with PDCCH resources 330. Specifically, aspects of the present disclosure support different DMRS configurations that enable communication of DMRS 325 on PDCCH resources 330 associated with a first RAT (e.g., 5G, NR) that do not overlap CRS resources 340 associated with a second RAT (e.g., 4G, LTE).

[0113] About Figure 3 310 further illustrates and describes the attendant advantages of the present disclosure. As shown in resource configuration 310, UE 115-a may receive a PDCCH configuration 315 associated with a first RAT including a plurality of CCEs. PDCCH configuration 315 may indicate or include a set (e.g., CORESET) of PDCCH resources 330 spanning two or three consecutive symbol periods in the time domain. For example, PDCCH configuration 315 may be associated with a set of PDCCH resources 330 spanning consecutive symbols 1 and 2 of resource configuration 310.

[0114] The UE 115-a may alternatively receive a CRS configuration 320 associated with a second RAT, wherein the CRS configuration 320 indicates or includes a CRS resource 340 that at least partially overlaps with the PDCCH resource 330. For example, as shown in the resource configuration 310, the CRS resource 340 overlaps with the OFDM symbol of the PDCCH resource 330 within symbol 1. In this regard, at least one symbol period (e.g., symbol 2) of the PDCCH resource 330 may not overlap with the CRS resource 340.

[0115] According to some specific implementations / DMRS configurations (e.g., Figure 4), PDCCH DMRS may not be sent on symbol periods in which CRS resources 340 are present. On symbol periods in which CRS resources 340 are not present, DMRS may be mapped in the same manner as for conventional PDCCH resources or CORESETs (e.g., DMRS resources 335 are mapped on resource elements #1, #5, #9 in each REG), as shown in resource configuration 310. In addition, the PDCCH payload may be mapped on resource elements for the monitored PDCCH but not for the associated PDCCH DMRS in the same manner as some legacy PDCCH / CORESETs, and then punctured at resource elements that overlap or collide with LTE CRS resources. In other words, UE115-a may monitor (and receive) non-DMRS downlink control messages within PDCCH resources 330 that are not allocated for DMRS resources 335 and do not overlap with CRS resources 340.

[0116] Some aspects of the present disclosure are directed to DMRS configuration (e.g., Figure 4 – Figure 7 ), which is used to determine how to map DMRS resources 335 within PDCCH resources 330 when PDCCH resources 330 and CRS resources 340 at least partially overlap, as shown in resource configuration 310. In addition, the DMRS configuration described herein can achieve DMRS mapping while maintaining the characteristics or parameters of conventional PDCCH resources / CORESETs (including REG cluster size, CCE to REG mapping configuration, and aggregation level).

[0117] An example may prove illustrative. Figure 3 In the wireless communication system 300 illustrated in FIG. 1 , UE 115 - a may receive first control signaling indicating a downlink control channel configuration (e.g., PDCCH configuration 315) associated with a first RAT. For example, UE 115 - a may receive first control signaling (e.g., RRC signaling) indicating a PDCCH configuration 315 associated with a 5G RAT and / or NR access technology. The downlink control channel configuration may be associated with a non-interleaved mapping configuration or an interleaved mapping configuration, as will be described in detail in FIG. Figure 4 – Figure 7 The PDCCH configuration 315 may indicate or be associated with a first set of time-frequency resources (eg, PDCCH resources 330). In addition, the first set of time-frequency resources may include one or more CCEs.

[0118] UE 115-a may receive second control signaling indicating a CRS configuration 320 associated with a second RAT. In some cases, UE 115-a may receive the second control signaling for CRS configuration 320 based on receiving the first control signaling for PDCCH configuration 315. CRS configuration 320 may indicate or be associated with a second set of time-frequency resources (e.g., CRS resources 340). In addition, CRS resources 340 may at least partially overlap with at least one CCE of PDCCH resources 330 of PDCCH configuration 315. That is, the CRS bandwidth may at least partially overlap with the PDCCH bandwidth.

[0119] In some implementations, the UE 115-a may desire to be configured with a PDCCH configuration 315 such that some of the REG bundles or CCEs of the PDCCH configuration 315 that the UE 115-a desires to monitor overlap with the CRS resources 340, with some other REG bundles or CCEs not overlapping with the CRS resources 340 within a given PDCCH monitoring opportunity. That is, the UE 115-a may desire to be configured with a PDCCH configuration 315 and a CRS configuration 320 such that all REG bundles / CCEs at least partially overlap with the CRS resources 340, or such that no REG bundles / CCEs at least partially overlap with the CRS resources 340. In this regard, in some cases, the network entity 105-a may configure the downlink control channel configuration (e.g., NR-PDCCH configuration 315 / CORESET) and / or the CRS configuration 320 such that the CORESET bandwidth and the CRS bandwidth completely overlap with each other, or do not overlap at all.

[0120] In some aspects, the UE 115-a, the network entity 105-a, or both may identify the DMRS configuration to be used. Specifically, the UE 115-a and / or the network entity 105-a may identify which DMRS configuration is to be used to identify the DMRS resource 335 based on the PDCCH configuration 315 and the CRS configuration 320. In other words, the UE 115-a, the network entity 105-a, or both may identify Figure 4 – Figure 7 Which DMRS configuration among the DMRS configurations 400 to 700 illustrated in FIG. 4 is to be used to identify the DMRS resource 335 .

[0121] In some implementations, the network entity 105-a may indicate which DMRS configuration 400 to 700 to use or apply via first control signaling for indicating the PDCCH configuration 315, via second control signaling for indicating the CRS configuration 320, via additional control signaling (e.g., RRC signaling, downlink control information (DCI) signaling, MAC control element (MAC-CE) signaling), or any combination thereof. In additional or alternative implementations, the UE 115-a may be configured (e.g., preconfigured to) use or apply one of the DMRS configurations 400 to 700, such as based on different time periods or based on the satisfaction of certain conditions.

[0122] Reference Figure 4 – Figure 7 A corresponding DMRS configuration for mapping DMRS resources 335 within the set of PDCCH resources 330 is further shown and described.

[0123] The UE 115-a, the network entity 105-a, or both may identify the DMRS resources 335 (e.g., a third set of time-frequency resources) to be used for receiving / sending the DMRS 325. Specifically, the UE 115-a and / or the network entity 105-a may identify the DMRS resources 335 based on the PDCCH configuration 315 (e.g., the PDCCH resources 330) and the CRS configuration 320 (e.g., the CRS resources 340) and according to the identified DMRS configuration.

[0124] If it will Figure 4 – Figure 7 As further shown and described in , the UE 115-a and / or the network entity 105-a may identify a set of DMRS resources 335 within a set of PDCCH resources 330 based on a DMRS mapping configuration. Specifically, the UE 115-a and / or the network entity 105-a may identify DMRS resources 335 within a portion of one or more CCEs of the PDCCH resources 330 that do not overlap with the CRS resources 340. Different DMRS configurations 400, 500, 600, 700 may enable the UE 115-a and / or the network entity 105-a to identify DMRS resources 335 with different granularities. For example, Figure 4 The DMRS configuration 400 illustrated in FIG. 4 may be used to identify DMRS resources 335 on a per-CORESET basis, while Figure 5 The DMRS configuration 500 illustrated in FIG. 5 may be used to identify DMRS resources 335 on a per-CCE basis. Figure 6 The DMRS configuration 600 illustrated in FIG. 6 may be used to identify DMRS resources 335 on a per-REG bundle basis, while Figure 7The DMRS configuration 700 illustrated in FIG. 7 may be used to identify the DMRS resources 335 on a per-sub-REG bundle basis (eg, on a per-portion basis of a REG bundle).

[0125] In some aspects, UE 115-a may monitor, process, and / or blindly decode a particular number and / or type of CCEs of a first set of time-frequency resources configured for a downlink control channel. Figure 4 – Figure 7 In further detail, different DMRS configurations may result in different types of CCEs, where the different types of CCEs may vary in the level or degree of overlap with the CRS resources 340 and / or in the pattern of the DMRS resources 335 within the corresponding CCEs. Figure 4 The DMRS configuration 400 illustrated in FIG. 4 may result in one type of CCE 430, while Figure 5 The DMRS configuration 500 illustrated in FIG. 5 may result in up to two different types of CCEs 530. In addition, Figure 6 The DMRS configuration 600 illustrated in FIG. 6 may result in up to three different types of CCEs 630, and Figure 7 The DMRS configuration 700 illustrated in FIG. 7 may result in up to four different types of CCEs 730 .

[0126] As will be described in further detail herein, different types of CCEs may be treated the same or differently with respect to how many CCEs the UE 115-a is configured to process, monitor, and / or decode within a given monitoring opportunity, span, or time slot. Thus, the UE 115-a may be configured to determine whether the UE 115-a is to treat different types of CCEs as the same or different from each other, and to identify an applicable threshold number of CCEs that the UE 115-a is able or expected to process or monitor within a given monitoring opportunity, span, or time slot.

[0127] Subsequently, the UE 115-a may receive the DMRS 325 from the network entity 105-a within the third set of time-frequency resources (e.g., the DMRS resources 335). In this regard, based on the PDCCH configuration 315, the CRS configuration 320, the DMRS configuration, or any combination thereof, the UE 115-a may receive the DMRS 325 and the network entity 105-a may send the DMRS.

[0128] For example, the UE 115-a may receive the DMRS 325 within the DMRS resources 335 illustrated in the resource configuration 310. In this regard, the UE 115-a may receive the DMRS 325 within a portion of the PDCCH resources 330 that does not overlap with the CRS resources 340.

[0129] In some implementations, the UE 115-a may receive a downlink control message (e.g., a PDCCH message) from the network entity 105-a within a portion of the PDCCH resources 330 that is not allocated for the DMRS 325. Specifically, the UE 115-a may receive the downlink control message within a portion of the PDCCH resources 330 that does not overlap with the CRS resources 340 and is not allocated for the DMRS 325.

[0130] For example, referring to resource configuration 310, UE 115-a may receive a downlink control message (e.g., a non-DMRS control message) within symbols 1 and 2 on resource elements 11 and 12, within symbols 1 and 2 on resource elements 8 and 9, within symbol 2 of resource element 7, and so on.

[0131] The techniques described herein may enable communication of DMRS 325 within a PDCCH resource 330 that at least partially overlaps with a CRS resource 340. Specifically, in a case where a PDCCH resource 330 associated with a first RAT (e.g., 5G, NR) is "punctured" by a CRS resource 340 associated with a second RAT (e.g., 4G, LTE), aspects of the present disclosure may enable transmission of DMRS 325 within the PDCCH resource 330. In this regard, even in the case where the PDCCH resource 330 conflicts (e.g., overlaps) with resources of a different RAT, aspects of the present disclosure may preserve the use of the PDCCH resource 330, thereby facilitating communication of DMRS 325 and improving resource utilization within a wireless communication system. Therefore, by facilitating communication of DMRS 325, aspects of the present disclosure may improve the reliability and efficiency of wireless communications within a wireless communication system.

[0132] Figure 4 An example of a DMRS configuration 400 that supports overlapping downlink control channels and CRS bandwidths according to one or more aspects of the present disclosure is illustrated. In some examples, aspects of the DMRS configuration 400 can implement or be implemented by aspects of the wireless communication system 100, the network architecture 200, the wireless communication system 300, or any combination thereof. Specifically, the DMRS configuration 400 can enable DMRS to be communicated on a PDCCH resource associated with a first RAT that at least partially overlaps with a CRS resource associated with a second RAT, as described in reference to Figure 1-Figure 3 The above, and other aspects.

[0133] DMRS configuration 400 illustrates a non-interlaced CCE to REG mapping configuration 405-a and an interlaced CCE to REG mapping configuration 405-b. Mapping configurations 405-a, 405-b illustrate resource sets including sets of PDCCH resources 410-a, 410-b and CRS resources 415-a, 415-b. The set of PDCCH resources 410 can be associated with a first RAT (such as 5G, NR, or both). Conversely, CRS resources 415 can be associated with a second RAT (such as 4G, LTE, or both). In some aspects, PDCCH resources 410 can be associated with PDCCH bandwidth 420, and CRS resources 415 can be associated with CRS bandwidth 425. Figure 4 The DMRS configuration 400 illustrated in FIG. 4 depicts resources in the frequency domain along the y-axis and resources in the time domain along the x-axis.

[0134] As previously mentioned herein, UE 115 may receive control signaling (e.g., RRC signaling) indicating a PDCCH configuration including or indicating PDCCH resources 410, PDCCH bandwidth 420, or both. In addition, the PDCCH configuration may indicate or be associated with a non-interleaved CCE to REG mapping configuration 405-a or an interleaved CCE to REG mapping configuration 405-b. Similarly, UE 115 may receive control signaling (e.g., RRC signaling) indicating a CRS configuration including or indicating CRS resources 415, CRS bandwidth 425, or both.

[0135] A PDCCH configuration (e.g., PDCCH resource 410) may include or be associated with a CORESET that spans one or more symbols (e.g., one or more symbol periods) in the frequency domain. Figure 4 As shown in , the PDCCH resource 410 may span two symbols (e.g., symbols 1 and 2) in the frequency domain. Referring to the non-interleaved mapping configuration 405-a, the PDCCH configuration may include: a first CCE 430-a (CCE0) including REG bundles 0-2 (e.g., REGb 0-2) that are consecutive in the frequency domain, and a second CCE 430-b (CCE1) including REG bundles 3-5 that are consecutive in the frequency domain. Relatively speaking, referring to the interleaved mapping configuration 405-b, the PDCCH configuration may include a CCE 430-c (CCE0) including REG bundles 0-2 that are discontinuous in the frequency domain. In some cases, each REG bundle (e.g., REGb or REGb-x) may span one resource block in the frequency domain and span two symbols (e.g., two symbol periods) in the time domain. As shown in , the PDCCH resource 410 may span two symbols (e.g., symbols 1 and 2) in the frequency domain. Figure 4As shown, each of CCEs 430-a, 430-b, and 430-c may span symbols 1 and 2 associated with a corresponding set of PDCCH resources 410-a, 410-b. In some other cases, each REG cluster (e.g., REGb or REGb-x) may span three resource blocks in the frequency domain and two symbols (e.g., two symbol periods) in the time domain, which may be Figure 4 In some aspects, a PDCCH candidate or monitoring opportunity may include one or more CCEs 430 .

[0136] In some cases, such as Figure 4 As shown in , the PDCCH bandwidth 420 (e.g., the NR-PDCCH CORESET bandwidth) and the CRS bandwidth 425 (e.g., the LTE CRS bandwidth) may at least partially overlap with each other. For example, referring to the non-interleaved mapping configuration 405-a, the CRS resource 415-a does not overlap with the first CCE 430-a of the PDCCH resource 410-a, but overlaps with the second CCE 430-b of the PDCCH resource 410-a on symbol 1. As another example, referring to the interleaved mapping configuration 405-b, the CRS resource 415-b does not overlap with REGb-0 of the CCE 430-c, but partially and completely overlaps with REGb-1 and REGb-2 of the CCE 430-c on symbol 1, respectively.

[0137] As mentioned previously herein, according to some conventional techniques, in the case where the PDCCH resource 410 overlaps with the CRS resource 415, it may not be clear whether (or to what extent) the DMRS can be sent on the PDCCH resource 410, such as Figure 4 Specifically, according to some conventional techniques, it is unclear how to construct NR-PDCCH / DMRS and how UE 115 performs channel estimation and decoding within PDCCH resource 410.

[0138] Therefore, the DMRS configuration 400 illustrates a resource configuration that enables DMRS to be transmitted on the PDCCH resource 410 that does not overlap with the CRS resource 415. Specifically, the DMRS configuration 400 illustrates a configuration that enables DMRS resources 435 to be implemented within the PDCCH resource 410 on a per-CORESET basis. According to the DMRS configuration 400, the DMRS structure can be applied to any REG bundle of a PDCCH candidate associated with a search space set of a CORESET, regardless of whether the REG bundle or CCE 430 overlaps with the CRS resource 415.

[0139] In other words, the DMRS configuration 400 may include DMRS resources 435 within symbols (eg, symbol periods) of the PDCCH resources 410 that do not overlap with the CRS resources 415. In other words, the DMRS configuration 400 may include DMRS resources 435 for each resource of symbols that do not include the CRS resources 415.

[0140] For example, referring to the non-interleaved mapping configuration 405-a, the CRS resource 415-a partially overlaps with the second CCE 430-b within symbol 1 of the PDCCH resource 410-a. The UE 115 and / or the network entity 105 may identify which PDCCH resources 410 include DMRS resources 435 based on the PDCCH configuration and the CRS configuration and according to the DMRS configuration. Therefore, according to the DMRS configuration 400, due to the overlap of the CRS resource 415-a in symbol 1, no PDCCH resource 410 within symbol 1 may include DMRS resources 435, and due to the fact that the CRS resource 415-a does not overlap with the PDCCH resource 410-a in symbol 2, all PDCCH resources 410 within symbol 2 may include DMRS resources 435. Therefore, the DMRS configuration 400 may include all PDCCH resources 410 of the set of PDCCH resources 410-a within symbol 2.

[0141] As another example, referring to the interleaved mapping configuration 405-b, the CRS resource 415-b completely overlaps with REGb-2 of the CCE 430-c within symbol 1 of the PDCCH resource 410-b, and partially overlaps with REGb-1 of the CCE 430-c within symbol 1 of the PDCCH resource 410-b. Therefore, according to the DMRS configuration 400, due to the overlap of the CRS resource 415-b in symbol 1, no PDCCH resource 410 within symbol 1 may include the DMRS resource 435, and due to the fact that the CRS resource 415-b does not overlap with the PDCCH resource 410-b in symbol 2, all PDCCH resources 410 within symbol 2 may include the DMRS resource 435. Therefore, the DMRS configuration 400 may include all PDCCH resources 410 of the set of PDCCH resources 410-b within symbol 2.

[0142] like Figure 4As shown, the CCEs 430 within the non-interleaved mapping configuration 405-a (and within the interleaved mapping configuration 405-b) present the same degree, level, or amount of overlap with the CRS resources 415, and / or present the same format with respect to the DMRS resources 435. In this regard, it can be said that the CCEs 430 present the same CCE type. For example, the first CCE 430-a and the second CCE 430-b present the same format of DMRS resources 435, wherein the DMRS resources 435 are only present in symbol 2 of the respective CCEs 430-a, 430-b. Therefore, it can be said that the CCEs 430-a, 430-b are of the same type (e.g., the same CCE type).

[0143] Figure 5 An example of a DMRS configuration 500 that supports overlapping downlink control channels is illustrated. In some examples, aspects of the DMRS configuration 500 can implement or be implemented by aspects of the wireless communication system 100, the network architecture 200, the wireless communication system 300, or any combination thereof. Specifically, the DMRS configuration 500 can enable DMRS to be communicated on a PDCCH resource associated with a first RAT that at least partially overlaps with a CRS resource associated with a second RAT, as described in reference to Figure 1-Figure 4 The above, and other aspects.

[0144] DMRS configuration 500 illustrates a non-interlaced CCE to REG mapping configuration 505-a and an interlaced CCE to REG mapping configuration 505-b. Mapping configurations 505-a, 505-b illustrate resource sets including sets of PDCCH resources 510-a, 510-b and CRS resources 515-a, 515-b. The set of PDCCH resources 510 can be associated with a first RAT (such as 5G, NR, or both). Conversely, CRS resources 515 can be associated with a second RAT (such as 4G, LTE, or both). In some aspects, PDCCH resources 510 can be associated with PDCCH bandwidth 520, and CRS resources 515 can be associated with CRS bandwidth 525. Figure 5 The DMRS configuration 500 illustrated in FIG. 5 depicts resources in the frequency domain along the y-axis and resources in the time domain along the x-axis.

[0145] As previously mentioned herein, the UE 115 may receive control signaling (e.g., RRC signaling) indicating a PDCCH configuration including or indicating PDCCH resources 510, PDCCH bandwidth 520, or both. In addition, the PDCCH configuration may indicate or be associated with a non-interleaved CCE to REG mapping configuration 505-a or an interleaved CCE to REG mapping configuration 505-b. Similarly, the UE 115 may receive control signaling (e.g., RRC signaling) indicating a CRS configuration including or indicating CRS resources 515, CRS bandwidth 525, or both.

[0146] A PDCCH configuration (eg, PDCCH resource 510) may include or be associated with a CORESET that spans one or more symbols in the frequency domain. Figure 4 As shown in , the PDCCH resources may span two symbols (e.g., symbols 1 and 2) in the frequency domain. Referring to the non-interleaved mapping configuration 505-a, the PDCCH configuration may include: a first CCE 530-a (CCE0) including REG bundles 0-2 (e.g., REGb 0-2) that are consecutive in the frequency domain, and a second CCE 530-b (CCE1) including REG bundles 3-5 that are consecutive in the frequency domain. Relatively speaking, referring to the interleaved mapping configuration 505-b, the PDCCH configuration may include a CCE 530-c (CCE0) including REGb 0-2 that are discontinuous in the frequency domain. In some cases, each REG bundle (e.g., REGb or REGb-x) may span one resource block in the frequency domain and span two symbols (e.g., two symbol periods) in the time domain. As Figure 5 As shown, each of CCEs 530-a, 530-b, and 530-c may span symbols 1 and 2 associated with a corresponding set of PDCCH resources 510-a, 510-b. In some other cases, each REG cluster (e.g., REGb or REGb-x) may span three resource blocks in the frequency domain and two symbols (e.g., two symbol periods) in the time domain, which may be Figure 5 In some aspects, a PDCCH candidate or monitoring opportunity may include one or more CCEs 530.

[0147] In some cases, such as Figure 5As shown in , the PDCCH bandwidth 520 (e.g., the NR-PDCCH CORESET bandwidth) and the CRS bandwidth 525 (e.g., the LTE CRS bandwidth) can at least partially overlap with each other. For example, referring to the non-interleaved mapping configuration 505-a, the CRS resource 515-a does not overlap with the first CCE 530-a of the PDCCH resource 510-a, but overlaps with the second CCE 530-b of the PDCCH resource 510-a on symbol 1. As another example, referring to the interleaved mapping configuration 505-b, the CRS resource 515-b does not overlap with REGb-0 of the CCE 530-c, but partially and completely overlaps with REGb-1 and REGb-2 of the CCE 530-c on symbol 1, respectively.

[0148] As mentioned earlier in this document, according to some conventional techniques, in the case where the PDCCH resource 510 overlaps with the CRS resource 515, it may be unclear whether (or to what extent) the DMRS can be sent on the PDCCH resource 510, such as Figure 4 Specifically, according to some conventional techniques, it is unclear how to construct NR-PDCCH / DMRS and how UE 115 performs channel estimation and decoding within PDCCH resource 510.

[0149] Therefore, the DMRS configuration 500 illustrates a resource configuration that enables DMRS to be transmitted on the PDCCH resource 510 that does not overlap with the CRS resource 515. Specifically, the DMRS configuration 500 illustrates a configuration that enables DMRS resources 535 to be implemented within the PDCCH resource 510 on a per-CCE basis. According to the DMRS configuration 500, the DMRS structure may be applied to any REG bundle of the CCE 530 that overlaps with the CRS resource 515. Therefore, the DMRS structure may be applied to any REG bundle of the CCE 530, regardless of whether the REG bundle of the CCE 530 overlaps with the CRS resource.

[0150] In other words, the DMRS configuration 500 may include: DMRS resources 535 including any CCE 530 that does not overlap with the CRS resource 515, and PDCCH resources 510 of the symbols of the CCE 530 that do not overlap with the CRS resource 515. In other words, the DMRS configuration 500 may include DMRS resources 535 for each resource of the symbol that does not include the CRS resource 515, and DMRS resources 535 within each CCE 530 that do not fully or partially overlap with the CRS resource 515.

[0151] For example, referring to the non-interleaved mapping configuration 505-a, the CRS resource 515-a partially overlaps with the second CCE 530-b within symbol 1 of the PDCCH resource 510-a, and does not overlap with the first CCE 530-a. The UE 115 and / or the network entity 105 may identify which PDCCH resources 510 include DMRS resources 535 based on the PDCCH configuration and the CRS configuration and according to the DMRS configuration. Therefore, according to the DMRS configuration 500, since the first CCE 530-a does not overlap with the CRS resource 515-a, the first CCE 530-a may include the DMRS resource 535. In addition, according to the DMRS configuration 500, since the resources of the second CCE 530-b in symbol 2 do not overlap with the CRS resource 515-a, the DMRS resource 535 may also include the PDCCH resource 510 of the second CCE 530-b within symbol 2.

[0152] Compare Figure 5 The non-interleaved mapping configuration 505-a and Figure 4 For the non-interleaved mapping configuration 405-a illustrated in FIG. 4 , the results of the DMRS configurations 400 and 500 are the same for the second CCE 430-b, 530-b. However, the results of the DMRS configurations 400 and 500 are different for the first CCE 430-a, 530-a. Specifically, Figure 4 The DMRS configuration 400 in FIG. 4 does not include a DMRS resource 435 within the resources of the first CCE 430 - a of symbol 1, and Figure 5 The DMRS configuration 500 in symbol 1 includes DMRS resources 535 within the resources of the first CCE 530 - a of symbol 1.

[0153] As another example, referring to the interleaved mapping configuration 505-b, the CRS resource 515-b completely overlaps with REGb-2 of the CCE 530-c within symbol 1 of the PDCCH resource 510-b, and partially overlaps with REGb-1 of the CCE 530-c within symbol 1 of the PDCCH resource 510-b. Therefore, according to the DMRS configuration 500, due to the overlap of the CRS resource 515-b in symbol 1, no PDCCH resource 510 within symbol 1 may include the DMRS resource 535, and due to the fact that the CRS resource 515-b does not overlap with the PDCCH resource 510-b in symbol 2, all PDCCH resources 510 within symbol 2 may include the DMRS resource 535. Therefore, the DMRS configuration 500 may include all PDCCH resources 510 of the set of PDCCH resources 510-b within symbol 2.

[0154] Compare Figure 5 The interleaved mapping configuration 505-b and Figure 44. In the interleaved mapping configuration 405-b illustrated in FIG. 4, the result of the DMRS configurations 400 and 500 is the same for both the first CCE 430-a, 530-a and the second CCE 430-b, 530-b.

[0155] like Figure 5 As shown in , the UE 115 may be configured to process, monitor, and / or decode different types of CCEs 530, wherein the different types of CCEs 530 differ in the degree, level, or amount of overlap with the CRS resources 515, and / or differ in the format with respect to the DMRS resources 535. For example, referring to the non-interleaved mapping configuration 505-a, the first CCE 530-a may present the first type because the entire CCE 530-a includes the DMRS resources 535, while the second CCE 530-b may present the second type because the DMRS resources 535 are only present in symbol 2 of the second CCE 530-b. In addition, in some cases, the CCE 530-c illustrated in the interleaved mapping configuration 505-b may also be considered to be associated with the second type because the DMRS resources 535 are only present in symbol 2 of the CCE 530-c.

[0156] When it comes to processing, monitoring and / or decoding different types of CCE 530, depending on different implementations, a first type of CCE 530 (e.g., a first CCE 530-a) and a second type of CCE 530 (e.g., a second CCE 530-b) may be treated the same or differently. Specifically, different types of CCE 530 may be processed the same or differently with respect to a threshold number N of CCE 530 that the UE 115 is capable of processing, monitoring or decoding (where the threshold number N of CCE 530 may be configured at the UE 115 and / or signaled to the UE 115).

[0157] According to a first specific implementation, these two types of CCE 530 may be treated equally. For example, if UE 115 is capable of processing a threshold number N of CCE 530 within a given PDCCH monitoring opportunity, span, or time slot, UE 115 may be able to fully process a threshold number N of CCE 530 for both types of CCE 530 at a given PDCCH monitoring opportunity, span, or time slot. In other words, UE 115 may be able to process the sum of N number of first type and second type CCE 530. If there are more than N number of CCE 530 including the first type and / or the second type at a given PDCCH monitoring opportunity, span, or time slot, UE 115 may not monitor one or some search space sets so that the number does not exceed N.

[0158] According to a second specific implementation, the two types of CCE 530 may be treated differently, with separate blind decoding and / or CCE budgets for different types of CCE 530. For example, the UE 115 may be able to process a first threshold number N1 of the first type of CCE 530 within a given PDCCH monitoring opportunity, span, or time slot, and may be able to process a second threshold number N2 of the second type of CCE 530 within a given PDCCH monitoring opportunity or time slot. In this example, the UE 115 may be able to process up to N1+N2 number of CCE 530, where N1+N2 may be less than or equal to N, which represents the total number of CCE 530 that the UE 115 can monitor within a given monitoring opportunity or span or time slot. If there are more than N1 number of first type CCE 530 and / or N2 number of second type CCE 530 at a given PDCCH monitoring opportunity or span or time slot, the UE 115 may not monitor one or some search space sets so that the number does not exceed N1 and N2, respectively.

[0159] Figure 6 An example of a DMRS configuration 600 that supports overlapping downlink control channel and CRS bandwidth according to one or more aspects of the present disclosure is illustrated. In some examples, aspects of the DMRS configuration 600 can implement or be implemented by aspects of the wireless communication system 100, the network architecture 200, the wireless communication system 300, or any combination thereof. Specifically, the DMRS configuration 600 can enable DMRS to be communicated on a PDCCH resource associated with a first RAT that at least partially overlaps with a CRS resource associated with a second RAT, as described in reference to Figure 1-Figure 5 The above, and other aspects.

[0160] DMRS configuration 600 illustrates a non-interlaced CCE to REG mapping configuration 605-a and an interlaced CCE to REG mapping configuration 605-b. Mapping configurations 605-a, 605-b illustrate resource sets including sets of PDCCH resources 610-a, 610-b and CRS resources 615-a, 615-b. The set of PDCCH resources 610 can be associated with a first RAT (such as 5G, NR, or both). In contrast, CRS resources 615 can be associated with a second RAT (such as 4G, LTE, or both). In some aspects, PDCCH resources 610 can be associated with PDCCH bandwidth 620, and CRS resources 615 can be associated with CRS bandwidth 625. Figure 6 The DMRS configuration 600 illustrated in FIG. 6 depicts resources in the frequency domain along the y-axis and resources in the time domain along the x-axis.

[0161] As previously mentioned herein, UE 115 may receive control signaling (e.g., RRC signaling) indicating a PDCCH configuration including or indicating PDCCH resources 610, PDCCH bandwidth 620, or both. In addition, the PDCCH configuration may indicate or be associated with a non-interleaved CCE to REG mapping configuration 605-a or an interleaved CCE to REG mapping configuration 605-b. Similarly, UE 115 may receive control signaling (e.g., RRC signaling) indicating a CRS configuration including or indicating CRS resources 615, CRS bandwidth 625, or both.

[0162] A PDCCH configuration (eg, PDCCH resource 610) may include or be associated with a CORESET that spans one or more symbols in the frequency domain. Figure 4 As shown in , the PDCCH resources may span two symbols (e.g., symbols 1 and 2) in the frequency domain. Referring to the non-interleaved mapping configuration 605-a, the PDCCH configuration may include: a first CCE 630-a (CCE0) including REG bundles 0-2 (e.g., REGb 0-2) that are consecutive in the frequency domain, and a second CCE 630-b (CCE1) including REG bundles 3-5 that are consecutive in the frequency domain. Relatively speaking, referring to the interleaved mapping configuration 605-b, the PDCCH configuration may include a CCE 630-c (CCE0) including REG bundles 0-2 that are discontinuous in the frequency domain. In some cases, each REG bundle (e.g., REGb or REGb-x) may span one resource block in the frequency domain and span two symbols (e.g., two symbol periods) in the time domain. As Figure 6 As shown, each of CCEs 630-a, 630-b, and 630-c may span symbols 1 and 2 associated with a corresponding set of PDCCH resources 610-a, 610-b. In some other cases, each REG cluster (e.g., REGb or REGb-x) may span three resource blocks in the frequency domain and two symbols (e.g., two symbol periods) in the time domain, which may be Figure 6 In some aspects, a PDCCH candidate or monitoring opportunity may include one or more CCEs 630.

[0163] In some cases, such as Figure 6As shown in , the PDCCH bandwidth 620 (e.g., the NR-PDCCH CORESET bandwidth) and the CRS bandwidth 625 (e.g., the LTE CRS bandwidth) can at least partially overlap with each other. For example, referring to the non-interleaved mapping configuration 605-a, the CRS resource 615-a does not overlap with the first CCE 630-a of the PDCCH resource 610-a, but overlaps with the second CCE 630-b of the PDCCH resource 610-a on symbol 1. As another example, referring to the interleaved mapping configuration 605-b, the CRS resource 615-b does not overlap with REGb-0 of the CCE 630-c, but partially and completely overlaps with REGb-1 and REGb-2 of the CCE 630-c on symbol 1, respectively.

[0164] As mentioned previously herein, according to some conventional techniques, in the case where the PDCCH resource 610 overlaps with the CRS resource 615, it may not be clear whether (or to what extent) the DMRS can be sent on the PDCCH resource 610, such as Figure 6 Specifically, according to some conventional techniques, it is unclear how to construct NR-PDCCH / DMRS and how UE 115 performs channel estimation and decoding within PDCCH resource 610.

[0165] Therefore, the DMRS configuration 600 illustrates a resource configuration that enables DMRS to be transmitted on the PDCCH resource 610 that does not overlap with the CRS resource 615. Specifically, the DMRS configuration 600 illustrates a configuration that enables DMRS resources 635 to be implemented within the PDCCH resource 610 on a per-REG cluster basis. According to the DMRS configuration 600, the DMRS structure may be applied to a REG cluster that overlaps with the CRS resource 615. That is, for a REG cluster that completely or partially overlaps with the CRS resource 615, the DMRS structure is applied to any REG cluster of the CCE 630.

[0166] In other words, the DMRS configuration 600 may include a DMRS resource 635 including any CCE 630 that does not overlap with the CRS resource 615 , any REG that does not overlap with the CRS resource 615 , and a PDCCH resource 610 for symbols of the CCE 630 that does not overlap with the CRS resource 615 .

[0167] For example, referring to the non-interleaved mapping configuration 605-a, the CRS resource 615-a partially overlaps with the second CCE 630-b within symbol 1 of the PDCCH resource 610-a, and does not overlap with the first CCE 630-a. The UE 115 and / or the network entity 105 may identify which PDCCH resources 610 include the DMRS resources 635 based on the PDCCH configuration and the CRS configuration and according to the DMRS configuration. Therefore, according to the DMRS configuration 600, since the first CCE 630-a does not overlap with the CRS resource 615-a, the first CCE 630-a may include the DMRS resource 635. In addition, according to the DMRS configuration 600, since the resources of the second CCE 630-b in symbol 2 do not overlap with the CRS resource 615-a, the DMRS resource 635 may also include the PDCCH resource 610 of the second CCE 630-b within symbol 2.

[0168] Compare Figure 6 The non-interleaved mapping configuration 605-a and Figure 5 4. As shown in the non-interleaved mapping configuration 505-a illustrated in FIG, the result of the DMRS configurations 500 and 600 is the same for both the first CCE 530-a, 630-a and the second CCE 530-b, 630-b.

[0169] As another example, referring to the interleaved mapping configuration 605-b, the CRS resource 615-b completely overlaps with REGb-2 of the CCE 630-c within symbol 1 of the PDCCH resource 610-b, and partially overlaps with REGb-1 of the CCE 630-c within symbol 1 of the PDCCH resource 610-b. Therefore, according to the DMRS configuration 600, due to the fact that the CRS resource 615-b does not overlap with the PDCCH resource 610-b in symbol 2, all PDCCH resources 610 within symbol 2 may include the DMRS resource 635. In addition, according to the DMRS configuration 600, due to the fact that REGb-0 does not completely or partially overlap with the CRS resource 615-b, all PDCCH resources 610 of REGb-0 may include the DMRS resource 635.

[0170] Compare Figure 6 The interleaved mapping configuration 605-b and Figure 5 In the interleaved mapping configuration 505-a illustrated in FIG. 1 , the results of the DMRS configurations 500 and 600 are the same for REGb-1 and REGb-2. However, the results of the DMRS configurations 500 and 600 are different for REGb-0. Specifically, Figure 5 The DMRS configuration 500 in FIG. 5 does not include the DMRS resources 535 within the resources of REGb-0 within symbol 1, and Figure 6The DMRS configuration 600 in φ includes DMRS resources 635 within resources of REGb- 0 within symbol 1.

[0171] like Figure 6 As shown in , the UE 115 may be configured to process, monitor, and / or decode different types of CCEs 630, wherein the different types of CCEs 630 differ in the degree, level, or amount of overlap with the CRS resources 615, and / or differ in the format with respect to the DMRS resources 635. For example, referring to the non-interleaved mapping configuration 605-a, the first CCE 630-a may present a first type because the entire CCE 630-a includes the DMRS resource 635, while the second CCE 630-b may present a second type because the DMRS resource 635 is present only in symbol 2 of the second CCE 630-b. In addition, referring to the interleaved mapping configuration 605-b, CCE 630-c can present a third type because some REG bundles (e.g., REGb-0) of CCE 630-c include DMRS resources 635 throughout the entire REG bundle, while other REG bundles (e.g., REGb-1, REGb-2) ​​of CCE 630-c only include DMRS resources 635 in symbol 2 of the corresponding REG bundle.

[0172] When it comes to processing, monitoring and / or decoding different types of CCE 630, depending on different implementations, a first type of CCE 630 (e.g., a first CCE 630-a), a second type of CCE 630 (e.g., a second CCE 630-b), and a third type of CCE 630 (e.g., CCE 630-c) may be treated the same or differently. Specifically, different types of CCE 630 may be processed the same or differently with respect to a threshold number N of CCE 630 that the UE 115 is capable of processing, monitoring, or decoding (where the threshold number N of CCE 630 may be configured at the UE 115 and / or signaled to the UE 115).

[0173] According to a first specific implementation, these three types of CCE 630 may be treated equally. For example, if UE 115 is capable of processing a threshold number N of CCE 630 within a given PDCCH monitoring opportunity or time slot, UE 115 may be able to fully process a threshold number N of CCE 630 for all three types of CCE 630 at a given PDCCH monitoring opportunity or time slot. In other words, UE 115 may be able to process a sum of N number of first type, second type and third type CCE 630. If there are more than N number of CCE 630 including the first type, the second type and / or the third type at a given PDCCH monitoring opportunity, span or time slot, UE 115 may not monitor one or some search space sets so that the number does not exceed N.

[0174] According to a second specific implementation, the three types of CCEs 630 may be treated differently, with separate blind decoding and / or CCE budgets for different types of CCEs 630. For example, the UE 115 may be able to process a first threshold number N1 of the first type of CCEs 630 within a given PDCCH monitoring opportunity or time slot, a second threshold number N2 of the second type of CCEs 630 within a given PDCCH monitoring opportunity or time slot, and a third threshold number N3 of the third type of CCEs 630 within a given PDCCH monitoring opportunity or time slot. In this example, the UE 115 may be able to process up to N1+N2+N3 number of CCEs 630, where N1+N2+N3 may be less than or equal to N, which represents the total number of CCEs 630 that the UE 115 is able to monitor within a given monitoring opportunity or time slot. If there are more than N1 number of first type CCE 630, more than N2 number of second type CCE 630, and / or more than N3 number of third type CCE 630 at a given PDCCH monitoring opportunity or span or time slot, the UE 115 may not monitor one or some search space sets so that the numbers do not exceed N1, N2 and N3, respectively.

[0175] According to a third specific implementation, the second type of CCE 630 (e.g., CCE 630-b) and the third type of CCE 630 (e.g., CCE 630-c) can be considered to be the same type for the purpose of processing CCE 630 within a monitoring opportunity or time slot, and thus can be counted together toward a threshold number N2 of CCE 630 that can be processed, monitored, or decoded.

[0176] Figure 7An example of a DMRS configuration 700 that supports overlapping downlink control channels and CRS bandwidths according to one or more aspects of the present disclosure is illustrated. In some examples, aspects of the DMRS configuration 700 can implement or be implemented by aspects of the wireless communication system 100, the network architecture 200, the wireless communication system 300, or any combination thereof. Specifically, the DMRS configuration 700 can enable DMRS to be communicated on a PDCCH resource associated with a first RAT that at least partially overlaps with a CRS resource associated with a second RAT, as described in reference to Figure 1-Figure 6 The above, and other aspects.

[0177] DMRS configuration 700 illustrates a non-interlaced CCE to REG mapping configuration 705-a and an interlaced CCE to REG mapping configuration 705-b. Mapping configurations 705-a, 705-b illustrate resource sets including sets of PDCCH resources 710-a, 710-b and CRS resources 715-a, 715-b. The set of PDCCH resources 710 can be associated with a first RAT (such as 5G, NR, or both). Conversely, CRS resources 715 can be associated with a second RAT (such as 4G, LTE, or both). In some aspects, PDCCH resources 710 can be associated with PDCCH bandwidth 720, and CRS resources 715 can be associated with CRS bandwidth 725. Figure 7 The DMRS configuration 700 illustrated in FIG. 7 depicts resources in the frequency domain along the y-axis and resources in the time domain along the x-axis.

[0178] As previously mentioned herein, the UE 115 may receive control signaling (e.g., RRC signaling) indicating a PDCCH configuration including or indicating PDCCH resources 710, PDCCH bandwidth 720, or both. In addition, the PDCCH configuration may indicate or be associated with a non-interlaced CCE to REG mapping configuration 705-a or an interlaced CCE to REG mapping configuration 705-b. Similarly, the UE 115 may receive control signaling (e.g., RRC signaling) indicating a CRS configuration including or indicating CRS resources 715, CRS bandwidth 725, or both.

[0179] A PDCCH configuration (eg, PDCCH resource 710) may include or be associated with a CORESET that spans one or more symbols in the frequency domain. Figure 4As shown in , the PDCCH resources may span two symbols (e.g., symbols 1 and 2) in the frequency domain. Referring to the non-interleaved mapping configuration 705-a, the PDCCH configuration may include: a first CCE 730-a (CCE0) including REG bundles 0-2 (e.g., REGb 0-2) that are consecutive in the frequency domain, and a second CCE 730-b (CCE1) including REG bundles 3-5 that are consecutive in the frequency domain. Relatively speaking, referring to the interleaved mapping configuration 705-b, the PDCCH configuration may include a CCE 730-c (CCE0) including REG bundles 0-2 that are discontinuous in the frequency domain. In some cases, each REG bundle (e.g., REGb or REGb-x) may span one resource block in the frequency domain and span two symbols (e.g., two symbol periods) in the time domain. As Figure 7 As shown, each of CCEs 730-a, 730-b, and 730-c may span symbols 1 and 2 associated with a corresponding set of PDCCH resources 710-a, 710-b. In some other cases, each REG cluster (e.g., REGb or REGb-x) may span three resource blocks in the frequency domain and two symbols (e.g., two symbol periods) in the time domain, which may be Figure 7 In some aspects, a PDCCH candidate or monitoring opportunity may include one or more CCEs 730.

[0180] In some cases, such as Figure 7 As shown in , the PDCCH bandwidth 720 (e.g., the NR-PDCCH CORESET bandwidth) and the CRS bandwidth 725 (e.g., the LTE CRS bandwidth) can at least partially overlap with each other. For example, referring to the non-interleaved mapping configuration 705-a, the CRS resource 715-a does not overlap with the first CCE 730-a of the PDCCH resource 710-a, but overlaps with the second CCE 730-b of the PDCCH resource 710-a on symbol 1. As another example, referring to the interleaved mapping configuration 705-b, the CRS resource 715-b does not overlap with REGb-0 of the CCE 730-c, but partially and completely overlaps with REGb-1 and REGb-2 of the CCE 730-c on symbol 1, respectively.

[0181] As mentioned previously herein, according to some conventional techniques, in the case where the PDCCH resource 710 overlaps with the CRS resource 715, it may not be clear whether (or to what extent) the DMRS can be sent on the PDCCH resource 710, such as Figure 6 Specifically, according to some conventional techniques, it is unclear how to construct NR-PDCCH / DMRS and how UE 115 performs channel estimation and decoding within PDCCH resource 710.

[0182] Therefore, the DMRS configuration 700 illustrates a resource configuration that enables DMRS to be transmitted on the PDCCH resource 710 that does not overlap with the CRS resource 715. Specifically, the DMRS configuration 700 illustrates a configuration that enables DMRS resources 735 to be implemented within the PDCCH resource 710 on a per-sub-REG bundle basis or on a per-portion basis of the REG. According to the DMRS configuration 700, the DMRS structure may be applied to a portion of the REG bundle (e.g., a subcarrier or a resource element) in the frequency domain. That is, the DMRS structure is applied to a portion of the REG bundle (e.g., a subcarrier or a resource element) that does not overlap with the CRS resource 715.

[0183] In other words, the DMRS configuration 700 may include DMRS resources 735 for any subcarrier or resource element in the frequency domain that does not overlap with the CRS resources 715 .

[0184] For example, referring to the non-interleaved mapping configuration 705-a, the CRS resources 715-a partially overlap with the second CCE 730-b within symbol 1 of the PDCCH resources 710-a, and do not overlap with the first CCE 730-a. The UE 115 and / or the network entity 105 may identify which PDCCH resources 510 include DMRS resources 535 based on the PDCCH configuration and the CRS configuration and according to the DMRS configuration. Therefore, according to the DMRS configuration 700, since the first CCE 730-a does not overlap with the CRS resources 715-a, the first CCE 730-a may include the DMRS resources 735. Additionally, according to the DMRS configuration 700, since the resources of the second CCE 730-b in symbol 2 do not overlap with the CRS resources 715-a, the DMRS resources 735 may also include the PDCCH resources 710 of the second CCE 730-b within symbol 2. In this regard, the DMRS resources 735 may include each subcarrier or resource block of the PDCCH resources 710 - a that does not overlap with the CRS resources 715 - a .

[0185] Compare Figure 7 The non-interleaved mapping configuration 705-a and Figure 6 6. As illustrated in the non-interleaved mapping configuration 605-a, the result of the DMRS configurations 600 and 700 is the same for both the first CCE 630-a, 730-a and the second CCE 630-b, 730-b.

[0186] As another example, referring to the interleaved mapping configuration 705-b, the CRS resource 715-b completely overlaps with REGb-2 of the CCE 730-c within symbol 1 of the PDCCH resource 710-b, and partially overlaps with REGb-1 of the CCE 730-c within symbol 1 of the PDCCH resource 710-b. Therefore, according to the DMRS configuration 700, due to the fact that the CRS resource 715-b does not overlap with the PDCCH resource 710-b in symbol 2, all PDCCH resources 710 within symbol 2 may include DMRS resources 735. In addition, according to the DMRS configuration 700, due to the fact that REGb-0 does not completely or partially overlap with the CRS resource 715-b, all PDCCH resources 710 of REGb-0 may include DMRS resources 735. In addition, the portion of the PDCCH resource 710 of REGb-1 that does not overlap with the CRS resource 715-b includes the DMRS resource 735. In this regard, the DMRS resources 735 may include each subcarrier or resource block of the PDCCH resources 710 - b that does not overlap with the CRS resources 715 - b .

[0187] Compare Figure 7 The interleaved mapping configuration 705-b and Figure 6 In the interleaved mapping configuration 605-a illustrated in FIG. 1 , the results of DMRS configurations 600 and 700 are the same for REGb-0 and REGb-2. However, the results of DMRS configurations 600 and 700 are different for REGb-1. Specifically, Figure 6 The DMRS configuration 600 in FIG. 6 does not include the DMRS resource 635 within the resource of REGb-1 within symbol 1, and Figure 7 The DMRS configuration 700 in symbol 1 includes DMRS resources 735 within a portion of the resources of REGb-1 within symbol 1 that do not overlap with the CRS resources 715-b.

[0188] like Figure 7 As shown in FIG. 1 , the UE 115 may be configured to process, monitor, and / or decode different types of CCEs 730, wherein the different types of CCEs 730 differ in the degree, level, or amount of overlap with the CRS resources 715, and / or differ in the format of the DMRS resources 735. For example, referring to the non-interleaved mapping configuration 705-a, the first CCE 730-a may exhibit a first type because the entire CCE 730-a includes the DMRS resources 735, while the second CCE 730-b may exhibit a second type because the DMRS resources 735 are only present in symbol 2 of the second CCE 730-b. In addition, in some cases, the DMRS configuration 700 may produce Figure 6, wherein at least one REG cluster (REGb-0) includes a DMRS resource 635 throughout the entire REG cluster, and at least one REG cluster includes a DMRS resource 635 only in symbol 2. In addition, referring to the interlaced mapping configuration 705-b, the CCE 730-c may present a fourth type because some REG clusters (e.g., REGb-0) of the CCE 730-c include DMRS resources 735 throughout the entire REG cluster, other REG clusters (e.g., REGb-2) ​​of the CCE 730-c include DMRS resources 735 only in symbol 2 of the corresponding REG cluster, and other REG clusters (REGb-1) of the CCE 730-c include DMRS resources 735 in symbol 2 and in a portion of symbol 1 (e.g., CCEs having a portion of a REG / REG cluster in the frequency domain).

[0189] When it comes to processing, monitoring, and / or decoding different types of CCEs 730, a first type of CCE 730 (e.g., a first CCE 730-a), a second type of CCE 730 (e.g., a second CCE 730-b), a third type of CCE 730 (e.g., Figure 6 630-c) and a fourth type of CCE 730 (e.g., CCE 730-c) illustrated in FIG. 1 may be treated the same or differently depending on different implementations. Specifically, different types of CCE 730 may be treated the same or differently with respect to a threshold number N of CCE 730 that UE 115 is capable of processing, monitoring, or decoding (wherein the threshold number N of CCE 730 may be configured at UE 115 and / or signaled to UE 115).

[0190] According to a first specific implementation, these four types of CCE 730 may be treated equally. For example, if UE 115 is capable of processing a threshold number N of CCE 730 within a given PDCCH monitoring opportunity or time slot, UE 115 may be able to fully process a threshold number N of CCE 730 for all four types of CCE 730 at a given PDCCH monitoring opportunity or time slot. In other words, UE 115 may be able to process a sum of N number of first type, second type, third type and fourth type CCE 530. If there are more than N number of CCE 730 including the first type, second type, third type and / or fourth type at a given PDCCH monitoring opportunity, span or time slot, UE 115 may not monitor one or some search space sets so that the number does not exceed N.

[0191] According to a second specific implementation, the four types of CCEs 730 may be treated differently, with separate blind decoding and / or CCE budgets for different types of CCEs 730. For example, the UE 115 may be able to process a first threshold number N1 of the first type of CCEs 730 within a given PDCCH monitoring opportunity or time slot, a second threshold number N2 of the second type of CCEs 730 within a given PDCCH monitoring opportunity or time slot, a third threshold number N3 of the third type of CCEs 730 within a given PDCCH monitoring opportunity or time slot, and a fourth threshold number N4 of the fourth type of CCEs 730 within a given PDCCH monitoring opportunity or time slot. In this example, the UE 115 may be able to process up to N1+N2+N3+N4 number of CCEs 730, where N1+N2+N3 may be less than or equal to N, which represents the total number of CCEs 730 that the UE 115 is able to monitor within a given monitoring opportunity or time slot. If there are more than N1 number of first type CCE 730, more than N2 number of second type CCE 730, more than N3 number of third type CCE 730, and / or more than N4 number of fourth type CCE 730 at a given PDCCH monitoring opportunity or span or time slot, UE 115 may not monitor one or some search space sets so that the numbers do not exceed N1, N2, N3 and N4, respectively.

[0192] According to a third specific implementation, the second type of CCE 730 (e.g., CCE 730-b), the third type of CCE 730 (e.g., Figure 6 630-c illustrated in FIG), and a fourth type of CCE 730 (e.g., CCE 730-c) may be considered to be of the same type for purposes of processing CCE 730 within a monitoring opportunity or time slot, and may therefore be counted together toward a threshold number N2 of CCE 730 that can be processed, monitored, or decoded.

[0193] Figure 8 An example of a process flow 800 for supporting overlapping downlink control channels and CRS bandwidths according to one or more aspects of the present disclosure is illustrated. In some examples, aspects of the process flow 800 may implement or be implemented by aspects of the wireless communication system 100, the network architecture 200, the wireless communication system 300, the DMRS configurations 400 to 700, or any combination thereof.

[0194] Process flow 800 may include UE 115-b and network entity 105-b, which may be as described in reference Figures 1 to 7 Examples of UE 115, network entity 105 and other wireless devices. For example, Figure 8 The UE 115-b and the network entity 105-b illustrated in FIG. 1 may include Figure 3 Examples of UE 115-a and network entity 105-a are respectively illustrated in FIG.

[0195] In some examples, the operations illustrated by process flow 800 may be performed by hardware (e.g., including circuits, processing blocks, logic components, and other components), code executed by a processor (e.g., software), or any combination thereof. The following alternative examples may be implemented in which some of the steps are performed in an order different from the order described or not performed at all. In some cases, the steps may include additional features not mentioned below, or additional steps may be added.

[0196] At 805, UE 115-b may receive first control signaling indicating a downlink control channel configuration (e.g., a PDCCH configuration) associated with a first RAT. For example, UE 115-b may receive first control signaling (e.g., RRC signaling) indicating a PDCCH configuration associated with a 5G RAT and / or NR access technology. The downlink control channel configuration may be associated with a non-interleaved mapping configuration or an interleaved mapping configuration, such as Figure 4-Figure 7 As previously described herein, the downlink control channel configuration may indicate a first set of time-frequency resources (e.g., Figure 4-Figure 7 The PDCCH resources 410, 510, 610 and 710 illustrated in FIG. 4) may be associated with the first set of time-frequency resources. In addition, the first set of time-frequency resources may include one or more CCEs (e.g., Figure 4-Figure 7 CCE 430, 530, 630 and 730 exemplified in .

[0197] At 810, UE 115-b may receive second control signaling indicating a CRS configuration associated with a second RAT. In some cases, UE 115-b may receive the second control signaling at 810 based on receiving the first control signaling at 805. For example, UE 115-b may receive second control signaling (e.g., RRC signaling) indicating a CRS configuration associated with a 4G RAT and / or an LTE RAT. As previously described herein, the CRS configuration may indicate a second set of time-frequency resources (e.g., such as Figure 4-Figure 7 The CRS resources 415, 515, 615, and 715 illustrated in the figure) or are associated with the second set of time-frequency resources. In addition, the second set of time-frequency resources may at least partially overlap with at least one CCE of the first set of time-frequency resources (e.g., PDCCH resources) configured for the downlink control channel. That is, the CRS bandwidth may at least partially overlap with the PDCCH bandwidth.

[0198] Although the first control signaling for indicating the downlink control channel configuration and the second control signaling for indicating the CRS configuration are shown and described as comprising separate signaling, this should not be considered a limitation of the present disclosure. That is, in some cases, the first control signaling and the second control signaling may be the same. For example, in some implementations, the downlink control channel configuration and the CRS configuration may be indicated to UE 115-b via a single RRC message.

[0199] In some implementations, UE 115-b may desire to be configured with a PDCCH configuration such that some of the REG bundles or CCEs of the PDCCH configuration that UE 115-b desires to monitor overlap with CRS resources, with some other REG bundles or CCEs not overlapping with CRS resources within a given PDCCH monitoring opportunity. That is, UE 115-b may desire to be configured with a PDCCH configuration and a CRS configuration that causes all REG bundles / CCEs to at least partially overlap with CRS resources, or causes no REG bundles / CCEs to at least partially overlap with CRS resources. In this regard, in some cases, the network entity 105-b may configure the downlink control channel configuration (e.g., NR-PDCCH configuration / CORESET) and / or the CRS configuration so that the CORESET bandwidth (e.g., PDCCH bandwidth 420, 520, 620, 720) and the CRS bandwidth (e.g., CRS bandwidth 425, 525, 625, 725) completely overlap with each other, or do not overlap at all.

[0200] At 815, the UE 115-b, the network entity 105-b, or both may identify the DMRS configuration to be used. Specifically, the UE 115-b and / or the network entity 105-b may identify which DMRS configuration is to be used to identify the DMRS resource based on the downlink control channel configuration and the CRS configuration. In other words, the UE 115-b, the network entity 105-b, or both may identify Figure 4-Figure 7 Which one of the DMRS configurations 400 to 700 illustrated in will be used to identify the DMRS resources.

[0201] In some implementations, the network entity 105-b may indicate which DMRS configuration 400 to 700 to use or apply via the first control signaling at 805, via the second control signaling at 810, via additional control signaling (e.g., DCI, MAC-CE), or any combination thereof. In additional or alternative implementations, the UE 115-b may be configured (e.g., preconfigured) to use or apply one of the DMRS configurations 400 to 700, such as based on different time periods or based on the satisfaction of certain conditions.

[0202] At 820, the UE 115-b, the network entity 105-b, or both may identify DMRS resources (e.g., a third set of time-frequency resources) to be used for receiving / sending DMRS. Specifically, the UE 115-b and / or the network entity 105-b may identify the DMRS resources based on the downlink control channel configuration and the CRS configuration and according to the identified DMRS configuration. At this point, the UE 115-b and / or the network entity 105-b may identify the DMRS resources at 820 based on receiving / sending the first control signaling at 805, receiving / sending the second control signaling at 810, identifying the DMRS configuration at 815, or any combination thereof.

[0203] like Figure 4-Figure 7 As shown and described in , the UE 115-b and / or the network entity 105-b may identify a set of DMRS resources 435, 535, 635, 735 within a set of PDCCH resources 410, 510, 610, 710 based on a DMRS configuration. Specifically, the UE 115-b and / or the network entity 105-b may identify DMRS resources within a portion of one or more CCEs 430, 530, 630, 730 of the PDCCH resources that do not overlap with the CRS resources 415, 515, 615, 715. Different DMRS configurations 400, 500, 600, 700 may enable the UE 115-b and / or the network entity 105-b to identify DMRS resources with different granularities. For example, Figure 4 The DMRS configuration 400 illustrated in FIG. 4 may be used to identify DMRS resources on a per-CORESET basis, while Figure 5 The DMRS configuration 500 illustrated in FIG. 5 can be used to identify DMRS resources on a per-CCE basis. Figure 6 The DMRS configuration 600 illustrated in FIG. 6 can be used to identify DMRS resources on a per-REG bundle basis, while Figure 7 The DMRS configuration 700 illustrated in FIG. 7 may be used to identify DMRS resources on a per-sub-REG bundle basis (eg, on a per-portion basis of a REG bundle).

[0204] At 825, UE 115-b may monitor, process, and / or blindly decode a particular number and / or type of CCEs of a first set of time-frequency resources of a downlink control channel configuration. Based on receiving the first control signaling at 805, receiving the second control signaling at 810, identifying the DMRS configuration at 815, identifying the DMRS resources at 820, or any combination thereof, UE 115-b may perform one or more processes at 825.

[0205] For example, as previously described herein, different DMRS configurations may result in different types of CCEs, where the different types of CCEs may vary in the level or degree of overlap with CRS resources and / or in the pattern of DMRS resources within the corresponding CCEs. Figure 4 The DMRS configuration 400 illustrated in FIG. 4 may generate one type of CCE 430, while Figure 5 The DMRS configuration 500 illustrated in FIG. 5 can generate up to two different types of CCEs 530. In addition, Figure 6 The DMRS configuration 600 illustrated in FIG. 6 can generate up to three different types of CCEs 630, and Figure 7 The DMRS configuration 700 illustrated in FIG. 7 may produce up to four different types of CCEs 730. As previously described herein, different types of CCEs may be treated the same or differently with respect to how many CCEs the UE 115 is configured to process, monitor, and / or decode within a given monitoring opportunity or time slot. Thus, the UE 115 may be configured to determine whether the UE 115 is to treat different types of CCEs as the same or different from one another, and to identify an applicable threshold number of CCEs that the UE 115 is able to or expects to process or monitor within a given monitoring opportunity or time slot.

[0206] At 830, the UE 115-b may receive a DMRS from the network entity 105-b within the third set of time-frequency resources (e.g., DMRS resources) identified at 820. In this regard, based on receiving / sending the first control signaling at 805, receiving / sending the second control signaling at 810, identifying the DMRS configuration at 815, identifying the DMRS resources at 820, monitoring / processing / decoding a particular number / type of CCEs at 825, or any combination thereof, at 830 the UE 115-b may receive the DMRS and the network entity 105-b may send the DMRS.

[0207] For example, UE 115-b may Figure 4 In the DMRS resource 435 illustrated in Figure 5 In the DMRS resource 535 illustrated in Figure 6 In the DMRS resource 635 illustrated in FIG. Figure 7 , and receives the DMRS according to the corresponding DMRS configurations 400, 500, 600, and 700. In this regard, the UE 115-b may receive the DMRS in a portion of the PDCCH resource that does not overlap with the CRS resource, such as Figure 4 – Figure 7 Example in.

[0208] At 835, UE 115-b may receive a downlink control message (e.g., a PDCCH message) from network entity 105-b within a portion of PDCCH resources that are not allocated for DMRS. Specifically, UE 115-b may receive the downlink control message within a portion of PDCCH resources that do not overlap with CRS resources and are not allocated for DMRS.

[0209] For example, refer to Figure 4 In the non-interleaved mapping configuration 405-a illustrated in FIG. 1 , the UE 115-b may receive a downlink control message (eg, a non-DMRS control message) in symbol 1 of the first CCE 430-a. Figure 4 In the interleaved mapping configuration 405-a illustrated in FIG, UE 115-b can receive a downlink control message within symbol 1 of REGb-0 and / or within a portion of symbol 1 of REGb-1 (e.g., a portion that does not overlap with CRS resource 415-b).

[0210] As another example, refer to Figure 5 505 - b, UE 115 - b may receive a downlink control message in symbol 1 of REGb-0 and / or in a portion of symbol 1 of REGb-1 (e.g., a portion that does not overlap with CRS resource 515 - b). Figure 5 In the non-interleaved mapping configuration 505 - a illustrated in FIG, because all PDCCH resources 510 - a overlap with CRS resources 515 - a or are allocated for DMRS resources 535 , the non-interleaved mapping configuration 505 - a may not be used to send / receive other non-DMRS downlink control messages.

[0211] The techniques described herein may enable the communication of DMRS within PDCCH resources that at least partially overlap with CRS resources. Specifically, in a case where PDCCH resources associated with a first RAT (e.g., 5G, NR) are "punctured" by CRS resources associated with a second RAT (e.g., 4G, LTE), various aspects of the present disclosure may enable the transmission of DMRS within the PDCCH resources. In this regard, even in the case where the PDCCH resources conflict (e.g., overlap) with resources of different RATs, various aspects of the present disclosure may retain the use of PDCCH resources, thereby facilitating the communication of DMRS and improving resource utilization within the wireless communication system. Therefore, by facilitating the communication of DMRS, various aspects of the present disclosure may improve the reliability and efficiency of wireless communications within a wireless communication system.

[0212] Fig. 9A block diagram 900 of a device 905 supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is shown. The device 905 may be an example of aspects of the UE 115 as described herein. The device 905 may include a receiver 910, a transmitter 915, and a communication manager 920. The device 905 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0213] The receiver 910 may provide means for receiving information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to overlapping downlink control channels and CRS bandwidth), user data, control information, or any combination thereof. The information may be communicated to other components of the device 905. The receiver 910 may utilize a single antenna or a collection of multiple antennas.

[0214] The transmitter 915 may provide means for transmitting signals generated by other components of the device 905. For example, the transmitter 915 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to overlapping downlink control channels and CRS bandwidth), user data, control information, or any combination thereof. In some examples, the transmitter 915 may be co-located with the receiver 910 in a transceiver module. The transmitter 915 may utilize a single antenna or a collection of multiple antennas.

[0215] The communication manager 920, the receiver 910, the transmitter 915, or various combinations thereof, or various components thereof may be examples of means for performing various aspects of overlapping downlink control channels and CRS bandwidth as described herein. For example, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may support methods for performing one or more of the functions described herein.

[0216] In some examples, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a digital signal processor (DSP), a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic components, discrete hardware components, or any combination thereof that is configured as or otherwise supports means for performing the functions described in the present disclosure. In some examples, the processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0217] Additionally or alternatively, in some examples, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be performed by a general purpose processor (e.g., configured as or otherwise supporting means for performing the functionality described in the present disclosure), a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices.

[0218] In some examples, the communication manager 920 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise cooperating with the receiver 910, the transmitter 915, or both. For example, the communication manager 920 may receive information from the receiver 910, transmit information to the transmitter 915, or be integrated in conjunction with the receiver 910, the transmitter 915, or both to obtain information, output information, or perform various other operations as described herein.

[0219] According to an example as disclosed herein, the communication manager 920 may support wireless communication at a UE. For example, the communication manager 920 may be configured to or otherwise support a component for: receiving a first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. The communication manager 920 may be configured to or otherwise support a component for: receiving a second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being for a second set of time-frequency resources at least partially overlapping with at least one CCE of the one or more CCEs. The communication manager 920 may be configured to or otherwise support a component for: receiving a DMRS in a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0220] By including or configuring a communication manager 920 according to an example as described herein, the device 905 (e.g., a processor that controls or is otherwise coupled to a receiver 910, a transmitter 915, a communication manager 920, or a combination thereof) may support techniques that enable DMRS to be communicated within a PDCCH resource that at least partially overlaps with a CRS resource. Specifically, in the case where a PDCCH resource associated with a first RAT (e.g., 5G, NR) is "punctured" by a CRS resource associated with a second RAT (e.g., 4G, LTE), various aspects of the present disclosure may enable DMRS to be sent within the PDCCH resource. In this regard, even in the case where the PDCCH resource conflicts (e.g., overlaps) with resources of a different RAT, various aspects of the present disclosure may retain the use of the PDCCH resource, thereby facilitating the communication of DMRS and improving resource utilization within the wireless communication system. Therefore, by facilitating the communication of DMRS, various aspects of the present disclosure may improve the reliability and efficiency of wireless communications within a wireless communication system.

[0221] Fig.10 A block diagram 1000 of a device 1005 supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is shown. The device 1005 may be an example of aspects of the device 905 or UE 115 as described herein. The device 1005 may include a receiver 1010, a transmitter 1015, and a communication manager 1020. The device 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0222] The receiver 1010 may provide means for receiving information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to overlapping downlink control channels and CRS bandwidth), user data, control information, or any combination thereof. The information may be communicated to other components of the device 1005. The receiver 1010 may utilize a single antenna or a collection of multiple antennas.

[0223] The transmitter 1015 may provide means for transmitting signals generated by other components of the device 1005. For example, the transmitter 1015 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, information channels related to overlapping downlink control channels and CRS bandwidth), user data, control information, or any combination thereof. In some examples, the transmitter 1015 may be co-located with the receiver 1010 in a transceiver module. The transmitter 1015 may utilize a single antenna or a collection of multiple antennas.

[0224] Device 1005 or its various components may be examples of components for performing various aspects of overlapping downlink control channels and CRS bandwidths as described herein. For example, communication manager 1020 may include control signaling reception manager 1025, DMRS reception manager 1030, or any combination thereof. Communication manager 1020 may be an example of various aspects of communication manager 920 as described herein. In some examples, communication manager 1020 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise in conjunction with receiver 1010, transmitter 1015, or both. For example, communication manager 1020 may receive information from receiver 1010, transmit information to transmitter 1015, or integrate with receiver 1010, transmitter 1015, or both in combination to obtain information, output information, or perform various other operations as described herein.

[0225] According to an example as disclosed herein, the communication manager 1020 may support wireless communication at a UE. The control signaling reception manager 1025 may be configured to or otherwise support means for receiving a first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. The control signaling reception manager 1025 may be configured to or otherwise support means for receiving a second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being for a second set of time-frequency resources at least partially overlapping with at least one CCE of the one or more CCEs. The DMRS reception manager 1030 may be configured to or otherwise support means for receiving a DMRS in a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0226] Fig.11A block diagram 1100 of a communication manager 1120 supporting overlapping downlink control channels and CRS bandwidths according to one or more aspects of the present disclosure is shown. The communication manager 1120 may be an example of aspects of the communication manager 920, the communication manager 1020, or both as described herein. The communication manager 1120 or its various components may be examples of components for performing various aspects of overlapping downlink control channels and CRS bandwidths as described herein. For example, the communication manager 1120 may include a control signaling reception manager 1125, a DMRS reception manager 1130, a signal processing manager 1135, a downlink control message reception manager 1140, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses).

[0227] According to examples as disclosed herein, the communication manager 1120 may support wireless communication at a UE. The control signaling reception manager 1125 may be configured to or otherwise support means for receiving a first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. In some examples, the control signaling reception manager 1125 may be configured to or otherwise support means for receiving a second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being for a second set of time-frequency resources at least partially overlapping with at least one CCE of the one or more CCEs. The DMRS reception manager 1130 may be configured to or otherwise support means for receiving a DMRS in a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0228] In some examples, one or more CCEs span at least a first symbol period and a second symbol period. In some examples, a second set of time-frequency resources for a CRS configuration at least partially overlaps a first portion of one or more CCEs within the first symbol period. In some examples, a third set of time-frequency resources includes a second portion of one or more CCEs within the second symbol period.

[0229] In some examples, the third set of time-frequency resources includes each time-frequency resource of one or more CCEs in the second symbol period, and excludes each time-frequency resource of one or more CCEs in the first symbol period based on the second set of time-frequency resources configured with the CRS overlapping with at least a portion of at least one CCE in the first symbol period.

[0230] In some examples, the one or more CCEs include a first CCE and a second CCE spanning at least a first symbol period and a second symbol period. In some examples, a second set of time-frequency resources for the CRS configuration at least partially overlaps with a first portion of the first CCE in the first symbol period. In some examples, a third set of time-frequency resources includes the second CCE and a second portion of the first CCE in the second symbol period.

[0231] In some examples, the one or more CCEs include a CCE that includes a first REG cluster and a second REG cluster spanning at least a first symbol period and a second symbol period. In some examples, the second set of time-frequency resources for the CRS configuration at least partially overlaps with a first portion of the first REG cluster in the first symbol period. In some examples, the third set of time-frequency resources includes the second REG cluster and a second portion of the first REG cluster within the second symbol period.

[0232] In some examples, the second set of time-frequency resources for the CRS configuration overlaps with a first subset of the first portion of the first REG cluster in the first symbol period. In some examples, the third set of time-frequency resources also includes a second subset of the first portion of the first REG cluster in the first symbol period.

[0233] In some examples, the signal processing manager 1135 may be configured to or otherwise support components for: processing signals received within the one or more CCEs, wherein the one or more CCEs include a first set of CCEs of a first type and a second set of CCEs of a second type, wherein the first set of the CCEs of the first type at least partially overlaps with the second set of time-frequency resources configured by the CRS, and wherein the second set of the CCEs of the second type does not overlap with the second set of time-frequency resources configured by the CRS, wherein receiving the DMRS is based on the processing.

[0234] In some examples, the signal processing manager 1135 may be configured to or otherwise support components for processing the signal received within a certain number of CCEs among the one or more CCEs within a monitoring opportunity, a time slot, or both, where the number of CCEs is less than or equal to a threshold number of CCEs of the first type and the second type that can be processed by the UE.

[0235] In some examples, the signal processing manager 1135 may be configured to or otherwise support components for: processing the signal received within a first number of CCEs in the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the first number of CCEs is less than or equal to a first threshold number of CCEs of the first type that can be processed by the UE. In some examples, the signal processing manager 1135 may be configured to or otherwise support components for: processing the signal received within a second number of CCEs in the one or more CCEs within the monitoring opportunity, the time slot, or both, wherein the second number of CCEs is less than or equal to a second threshold number of CCEs of the second type that can be processed by the UE.

[0236] In some examples, the signal processing manager 1135 may be configured to or otherwise support components for: processing signals received within the one or more CCEs, wherein the one or more CCEs include a first set of CCEs of a first type, a second set of CCEs of a second type, and a third set of CCEs of a third type, wherein the first set of the CCEs of the first type have a first level of overlap with the second set of time-frequency resources configured by the CRS, wherein the second set of the CCEs of the second type have a second level of overlap with the second set of time-frequency resources configured by the CRS, and wherein the third set of the CCEs of the third type does not overlap with the second set of time-frequency resources configured by the CRS, wherein receiving the DMRS is based on the processing.

[0237] In some examples, to support processing the signal, the signal processing manager 1135 may be configured to or otherwise support components for processing the signal received within a certain number of CCEs among the one or more CCEs within a monitoring opportunity, a time slot, or both, where the number of CCEs is less than or equal to a threshold number of CCEs of the first type, the second type, and the third type that can be processed by the UE.

[0238] In some examples, to support processing a signal, the signal processing manager 1135 may be configured to or otherwise support components for: processing the signal received within a first number of CCEs in the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the first number of CCEs is less than or equal to a first threshold number of CCEs of the first type that can be processed by the UE. In some examples, to support processing a signal, the signal processing manager 1135 may be configured to or otherwise support components for: processing the signal received within a second number of CCEs in the one or more CCEs within the monitoring opportunity, the time slot, or both, wherein the second number of CCEs is less than or equal to a second threshold number of CCEs of the second type that can be processed by the UE. In some examples, to support processing a signal, the signal processing manager 1135 may be configured to or otherwise support components for: processing the signal received within a third number of CCEs in the one or more CCEs within the monitoring opportunity, the time slot, or both, wherein the third number of CCEs is less than or equal to a third threshold number of CCEs of the third type that can be processed by the UE.

[0239] In some examples, to support processing a signal, the signal processing manager 1135 may be configured to or otherwise support components for: processing the signal received within a first number of CCEs in the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the first number of CCEs is less than or equal to a first threshold number of CCEs of the first type and the second type that can be processed by the UE. In some examples, to support processing a signal, the signal processing manager 1135 may be configured to or otherwise support components for: processing the signal received within a second number of CCEs in the one or more CCEs within the monitoring opportunity, the time slot, or both, wherein the second number of CCEs is less than or equal to a second threshold number of CCEs of the second type that can be processed by the UE.

[0240] In some examples, the downlink control message reception manager 1140 may be configured to or otherwise support components for receiving a downlink control message within a portion of the first set of time-frequency resources that does not include the second set of time-frequency resources and the third set of time-frequency resources.

[0241] In some examples, the first RAT includes a 5G RAT, a NR access technology, or any combination thereof. In some examples, the second RAT includes a 4G RAT, a LTE RAT, or any combination thereof.

[0242] Fig.12A diagram of a system 1200 including a device 1205 that supports overlapping downlink control channels and CRS bandwidths according to one or more aspects of the present disclosure is shown. The device 1205 may be an example of a device 905, a device 1005, or a UE 115 as described herein, or include components of these devices. The device 1205 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. The device 1205 may include components for two-way voice and data communications, including components for sending and receiving communications, such as a communication manager 1220, an input / output (I / O) controller 1210, a transceiver 1215, an antenna 1225, a memory 1230, a code 1235, and a processor 1240. These components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1245).

[0243] I / O controller 1210 can manage input and output signals for device 1205. I / O controller 1210 can also manage peripheral devices that are not integrated into device 1205. In some cases, I / O controller 1210 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1210 can utilize an operating system, such as or another known operating system. Additionally or alternatively, I / O controller 1210 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 1210 may be implemented as part of a processor (such as processor 1240). In some cases, a user may interact with device 1205 via I / O controller 1210 or via hardware components controlled by I / O controller 1210.

[0244] In some cases, the device 1205 may include a single antenna 1225. However, in some other cases, the device 1205 may have more than one antenna 1225, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 1215 may communicate bidirectionally via one or more antennas 1225, a wired link, or a wireless link as described herein. For example, the transceiver 1215 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1215 may also include a modem for modulating packets, providing the modulated packets to one or more antennas 1225 for transmission, and for demodulating packets received from one or more antennas 1225. The transceiver 1215, or the transceiver 1215 and one or more antennas 1225 may be examples of transmitters 915, transmitters 1015, receivers 910, receivers 1010, or any combination thereof or any components thereof as described herein.

[0245] Memory 1230 may include random access memory (RAM) and read-only memory (ROM). Memory 1230 may store computer-readable, computer-executable code 1235 including instructions that, when executed by processor 1240, cause device 1205 to perform various functions described herein. Code 1235 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, code 1235 may not be directly executable by processor 1240, but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, memory 1230 may include, among other things, a basic I / O system (BIOS) that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0246] Processor 1240 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1240 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into processor 1240. Processor 1240 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1230) to enable device 1205 to perform various functions (e.g., functions or tasks that support overlapping downlink control channels and CRS bandwidths). For example, device 1205 or a component of device 1205 may include processor 1240 and memory 1230 coupled to or coupled to processor 1240, and processor 1240 and memory 1230 are configured to perform the various functions described herein.

[0247] According to an example as disclosed herein, the communication manager 1220 may support wireless communication at a UE. For example, the communication manager 1220 may be configured to or otherwise support a component for: receiving a first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. The communication manager 1220 may be configured to or otherwise support a component for: receiving a second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being for a second set of time-frequency resources at least partially overlapping with at least one CCE of the one or more CCEs. The communication manager 1220 may be configured to or otherwise support a component for: receiving a DMRS in a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0248] By including or configuring a communication manager 1220 according to an example as described herein, the device 1205 can support technology that enables DMRS to be communicated within a PDCCH resource that at least partially overlaps with a CRS resource. Specifically, in a case where a PDCCH resource associated with a first RAT (e.g., 5G, NR) is "punctured" by a CRS resource associated with a second RAT (e.g., 4G, LTE), various aspects of the present disclosure can enable DMRS to be sent within the PDCCH resource. In this regard, even in the case where the PDCCH resource conflicts (e.g., overlaps) with resources of different RATs, various aspects of the present disclosure can retain the use of the PDCCH resources, thereby facilitating the communication of DMRS and improving resource utilization within the wireless communication system. Therefore, by facilitating the communication of DMRS, various aspects of the present disclosure can improve the reliability and efficiency of wireless communications within a wireless communication system.

[0249] In some examples, the communication manager 1220 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise cooperating with the transceiver 1215, one or more antennas 1225, or any combination thereof. Although the communication manager 1220 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 1220 may be supported or performed by the processor 1240, the memory 1230, the code 1235, or any combination thereof. For example, the code 1235 may include instructions that are executable by the processor 1240 to cause the device 1205 to perform various aspects of overlapping downlink control channels and CRS bandwidths as described herein, or the processor 1240 and the memory 1230 may be otherwise configured to perform or support such operations.

[0250] Fig.13 A block diagram 1300 of a device 1305 supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is shown. The device 1305 may be an example of aspects of the network entity 105 as described herein. The device 1305 may include a receiver 1310, a transmitter 1315, and a communication manager 1320. The device 1305 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0251] Receiver 1310 may provide means for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be communicated to other components of device 1305. In some examples, receiver 1310 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, receiver 1310 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof.

[0252] The transmitter 1315 may provide means for outputting (e.g., transmitting, providing, conveying, transmitting) information generated by other components of the device 1305. For example, the transmitter 1315 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) (such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units)). In some examples, the transmitter 1315 may support outputting information by sending signals via one or more antennas. Additionally or alternatively, the transmitter 1315 may support outputting information by sending signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1315 and the receiver 1310 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0253] The communication manager 1320, the receiver 1310, the transmitter 1315, or various combinations thereof, or various components thereof may be examples of means for performing various aspects of overlapping downlink control channels and CRS bandwidth as described herein. For example, the communication manager 1320, the receiver 1310, the transmitter 1315, or various combinations or components thereof may support methods for performing one or more of the functions described herein.

[0254] In some examples, the communication manager 1320, the receiver 1310, the transmitter 1315, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a DSP, a CPU, an ASIC, an FPGA or other programmable logic device, a microcontroller, discrete gate or transistor logic components, discrete hardware components, or any combination thereof configured as or otherwise supporting means for performing the functions described in the present disclosure. In some examples, a processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0255] Additionally or alternatively, in some examples, the communication manager 1320, the receiver 1310, the transmitter 1315, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 1320, the receiver 1310, the transmitter 1315, or various combinations or components thereof may be performed by a general purpose processor (e.g., configured as or otherwise supporting means for performing the functions described in the present disclosure), a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices.

[0256] In some examples, communication manager 1320 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise cooperating with receiver 1310, transmitter 1315, or both. For example, communication manager 1320 may receive information from receiver 1310, transmit information to transmitter 1315, or be integrated in conjunction with receiver 1310, transmitter 1315, or both to obtain information, output information, or perform various other operations as described herein.

[0257] According to an example as disclosed herein, the communication manager 1320 may support wireless communication at a network entity. For example, the communication manager 1320 may be configured to or otherwise support a component for: sending a first control signaling indicating a downlink control channel configuration associated with a first RAT to a UE, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. The communication manager 1320 may be configured to or otherwise support a component for: sending a second control signaling indicating a CRS configuration associated with a second RAT to the UE, the CRS configuration being for a second set of time-frequency resources at least partially overlapping with at least one CCE of the one or more CCEs. The communication manager 1320 may be configured to or otherwise support a component for: sending a DMRS to the UE within a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0258] By including or configuring a communication manager 1320 according to an example as described herein, the device 1305 (e.g., a processor that controls or is otherwise coupled to the receiver 1310, the transmitter 1315, the communication manager 1320, or a combination thereof) may support techniques that enable DMRS to be communicated within PDCCH resources that at least partially overlap with CRS resources. Specifically, in the case where PDCCH resources associated with a first RAT (e.g., 5G, NR) are "punctured" by CRS resources associated with a second RAT (e.g., 4G, LTE), various aspects of the present disclosure may enable DMRS to be sent within the PDCCH resources. In this regard, even in the case where the PDCCH resources conflict (e.g., overlap) with resources of different RATs, various aspects of the present disclosure may retain the use of PDCCH resources, thereby facilitating the communication of DMRS and improving resource utilization within the wireless communication system. Therefore, by facilitating the communication of DMRS, various aspects of the present disclosure may improve the reliability and efficiency of wireless communications within the wireless communication system.

[0259] Fig.14 A block diagram 1400 of a device 1405 supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is shown. The device 1405 may be an example of aspects of the device 1305 or network entity 105 as described herein. The device 1405 may include a receiver 1410, a transmitter 1415, and a communication manager 1420. The device 1405 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0260] Receiver 1410 may provide means for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be communicated to other components of device 1405. In some examples, receiver 1410 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, receiver 1410 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof.

[0261] The transmitter 1415 may provide means for outputting (e.g., transmitting, providing, conveying, transmitting) information generated by other components of the device 1405. For example, the transmitter 1415 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) (such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units)). In some examples, the transmitter 1415 may support outputting information by sending signals via one or more antennas. Additionally or alternatively, the transmitter 1415 may support outputting information by sending signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1415 and the receiver 1410 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0262] Device 1405 or its various components may be examples of components for performing various aspects of overlapping downlink control channels and CRS bandwidths as described herein. For example, communication manager 1420 may include control signaling transmission manager 1425, DMRS transmission manager 1430, or any combination thereof. Communication manager 1420 may be an example of various aspects of communication manager 1320 as described herein. In some examples, communication manager 1420 or its various components may be configured to use or otherwise cooperate with receiver 1410, transmitter 1415, or both to perform various operations (e.g., receive, obtain, monitor, output, send). For example, communication manager 1420 may receive information from receiver 1410, transmit information to transmitter 1415, or integrate with receiver 1410, transmitter 1415, or both to obtain information, output information, or perform various other operations as described herein.

[0263] According to an example as disclosed herein, the communication manager 1420 may support wireless communication at a network entity. The control signaling sending manager 1425 may be configured to or otherwise support means for: sending to the UE a first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. The control signaling sending manager 1425 may be configured to or otherwise support means for: sending to the UE a second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being for a second set of time-frequency resources at least partially overlapping with at least one CCE of the one or more CCEs. The DMRS sending manager 1430 may be configured to or otherwise support means for: sending to the UE a DMRS in a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0264] Fig.15 A block diagram 1500 of a communication manager 1520 supporting overlapping downlink control channels and CRS bandwidths according to one or more aspects of the present disclosure is shown. The communication manager 1520 may be an example of aspects of the communication manager 1320, the communication manager 1420, or both as described herein. The communication manager 1520 or its various components may be examples of components for performing various aspects of overlapping downlink control channels and CRS bandwidths as described herein. For example, the communication manager 1520 may include a control signaling transmission manager 1525, a DMRS transmission manager 1530, a downlink control message transmission manager 1535, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses), which may include communication within a protocol layer of a protocol stack, communication associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack, within a device, component, or virtualized component associated with a network entity 105, between devices, components, or virtualized components associated with a network entity 105), or any combination thereof.

[0265] According to examples as disclosed herein, the communication manager 1520 may support wireless communications at a network entity. The control signaling sending manager 1525 may be configured to or otherwise support means for sending to a UE first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. In some examples, the control signaling sending manager 1525 may be configured to or otherwise support means for sending to the UE second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being for a second set of time-frequency resources that at least partially overlaps with at least one CCE of the one or more CCEs. The DMRS transmission manager 1530 may be configured to or otherwise support a component for: transmitting a DMRS to the UE within a third set of time-frequency resources for a downlink control channel based on a DMRS configuration identified by the third set of time-frequency resources based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0266] In some examples, one or more CCEs span at least a first symbol period and a second symbol period. In some examples, a second set of time-frequency resources for a CRS configuration at least partially overlaps a first portion of one or more CCEs within the first symbol period. In some examples, a third set of time-frequency resources includes a second portion of one or more CCEs within the second symbol period.

[0267] In some examples, the third set of time-frequency resources includes each time-frequency resource of one or more CCEs in the second symbol period, and excludes each time-frequency resource of one or more CCEs in the first symbol period based on the second set of time-frequency resources configured with the CRS overlapping with at least a portion of at least one CCE in the first symbol period.

[0268] In some examples, the one or more CCEs include a first CCE and a second CCE spanning at least a first symbol period and a second symbol period. In some examples, a second set of time-frequency resources for the CRS configuration at least partially overlaps with a first portion of the first CCE in the first symbol period. In some examples, a third set of time-frequency resources includes the second CCE and a second portion of the first CCE in the second symbol period.

[0269] In some examples, the one or more CCEs include a CCE that includes a first REG cluster and a second REG cluster spanning at least a first symbol period and a second symbol period. In some examples, the second set of time-frequency resources for the CRS configuration at least partially overlaps with a first portion of the first REG cluster in the first symbol period. In some examples, the third set of time-frequency resources includes the second REG cluster and a second portion of the first REG cluster within the second symbol period.

[0270] In some examples, the second set of time-frequency resources for the CRS configuration overlaps with a first subset of the first portion of the first REG cluster in the first symbol period. In some examples, the third set of time-frequency resources also includes a second subset of the first portion of the first REG cluster in the first symbol period.

[0271] In some examples, the downlink control message sending manager 1535 may be configured to or otherwise support components for sending a downlink control message to the UE within a portion of the first set of time-frequency resources that does not include the second set of time-frequency resources and the third set of time-frequency resources.

[0272] Fig.16 A diagram of a system 1600 including a device 1605 supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is shown. The device 1605 may be an example of a device 1305, a device 1405, or a network entity 105 as described herein, or include components of these devices. The device 1605 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, which may include communication through one or more wired interfaces, through one or more wireless interfaces, or any combination thereof. The device 1605 may include components that support output and acquisition of communications, such as a communication manager 1620, a transceiver 1610, an antenna 1615, a memory 1625, a code 1630, and a processor 1635. These components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1640).

[0273] The transceiver 1610 may support bidirectional communication via a wired link, a wireless link, or both as described herein. In some examples, the transceiver 1610 may include a wired transceiver and may communicate bidirectionally with another wired transceiver. Additionally or alternatively, in some examples, the transceiver 1610 may include a wireless transceiver and may communicate bidirectionally with another wireless transceiver. In some examples, the device 1605 may include one or more antennas 1615, which may be capable of (e.g., concurrently) sending or receiving wireless transmissions. The transceiver 1610 may also include a modem for modulating a signal, for providing a modulated signal for transmission (e.g., via one or more antennas 1615, via a wired transmitter), for receiving a modulated signal (e.g., from one or more antennas 1615, from a wired receiver), and for demodulating a signal. In some implementations, the transceiver 1610 may include one or more interfaces, such as one or more interfaces coupled to one or more antennas 1615 configured to support various receiving or obtaining operations, or one or more interfaces coupled to one or more antennas 1615 configured to support various sending or outputting operations, or a combination thereof. In some implementations, the transceiver 1610 may include or be configured to be coupled to one or more processors or memory components that are operable to: perform or support operations based on received or obtained information or signals; or generate information or other signals for transmission or other output; or any combination thereof. In some implementations, the transceiver 1610, or the transceiver 1610 and one or more antennas 1615, or the transceiver 1610 and one or more antennas 1615 and one or more processors or memory components (e.g., processor 1635, or memory 1625, or both) may be included in a chip or chip assembly installed in the device 1605. Where applicable, transceiver 1610 or transceiver 1610 and one or more antennas 1615 or wired interfaces may be examples of transmitter 1315, transmitter 1415, receiver 1310, receiver 1410, or any combination thereof or any components thereof as described herein. In some examples, the transceiver may be operable to support communication via one or more communication links (e.g., communication link 125, backhaul communication link 120, midhaul communication link 162, fronthaul communication link 168).

[0274] Memory 1625 may include RAM and ROM. Memory 1625 may store computer-readable, computer-executable code 1630 including instructions that, when executed by processor 1635, cause device 1605 to perform various functions described herein. Code 1630 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, code 1630 may not be directly executable by processor 1635, but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, memory 1625 may include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0275] Processor 1635 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA, a microcontroller, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1635 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into processor 1635. Processor 1635 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1625) to enable device 1605 to perform various functions (e.g., functions or tasks that support overlapping downlink control channels and CRS bandwidths). For example, device 1605 or a component of device 1605 may include processor 1635 and memory 1625 coupled to processor 1635, and processor 1635 and memory 1625 are configured to perform various functions described herein. Processor 1635 can be an example of a cloud computing platform (e.g., one or more physical nodes and supporting software, such as an operating system, a virtual machine, or a container instance) that can host functions (e.g., by executing code 1630) to perform functions of device 1605. Processor 1635 can be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in device 1605 (such as in memory 1625). In some specific implementations, processor 1635 can be a component of a processing system. A processing system can generally refer to a system or a series of machines or components that receive inputs and process these inputs to produce a set of outputs (which can be passed to other systems or components of device 1605, for example). For example, a processing system of device 1605 can refer to a system including various other components or subcomponents of device 1605, such as processor 1635, or transceiver 1610, or communication manager 1620, or other components or combinations of components of device 1605. The processing system of device 1605 may be docked with other components of device 1605, and may process information (such as input or signal) received from other components, or output information to other components. For example, a chip or modem of device 1605 may include a processing system and an interface for outputting information or for obtaining information or both. The interface may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information. In some specific implementations, the first interface may refer to an interface between a processing system of a chip or modem and a transmitter, so that device 1605 can send information output from a chip or modem. In some specific implementations, the second interface may refer to an interface between a processing system of a chip or modem and a receiver, so that device 1605 can obtain information or signal input, and the information can be passed to the processing system. Those of ordinary skill in the art will readily appreciate that the first interface may also obtain information or signal input, and the second interface may also output information or signal output.

[0276] In some examples, bus 1640 may support communications of a protocol layer of a protocol stack (e.g., within the protocol layer). In some examples, bus 1640 may support communications associated with a logical channel of a protocol stack (e.g., between protocol layers of the protocol stack), which may include communications performed within a component of device 1605 or between different components of device 1605 that may be co-located or located in different locations (e.g., where device 1605 may refer to a system where one or more of communication manager 1620, transceiver 1610, memory 1625, code 1630, and processor 1635 may be located in one of the different components or divided between the different components).

[0277] In some examples, communication manager 1620 may manage aspects of communications with core network 130 (e.g., via one or more wired or wireless backhaul links). For example, communication manager 1620 may manage delivery of data communications for client devices, such as one or more UEs 115. In some examples, communication manager 1620 may manage communications with other network entities 105 and may include a controller or scheduler for controlling communications with UE 115 in coordination with other network entities 105. In some examples, communication manager 1620 may support an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between network entities 105.

[0278] According to an example as disclosed herein, the communication manager 1620 may support wireless communication at a network entity. For example, the communication manager 1620 may be configured to or otherwise support a component for: sending a first control signaling indicating a downlink control channel configuration associated with a first RAT to a UE, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. The communication manager 1620 may be configured to or otherwise support a component for: sending a second control signaling indicating a CRS configuration associated with a second RAT to the UE, the CRS configuration being for a second set of time-frequency resources at least partially overlapping with at least one CCE of the one or more CCEs. The communication manager 1620 may be configured to or otherwise support a component for: sending a DMRS to the UE within a third set of time-frequency resources according to a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0279] By including or configuring a communication manager 1620 according to an example as described herein, the device 1605 can support technology that enables DMRS to be communicated within a PDCCH resource that at least partially overlaps with a CRS resource. Specifically, in a case where a PDCCH resource associated with a first RAT (e.g., 5G, NR) is "punctured" by a CRS resource associated with a second RAT (e.g., 4G, LTE), various aspects of the present disclosure can enable DMRS to be sent within the PDCCH resource. In this regard, even in the case where the PDCCH resource conflicts (e.g., overlaps) with resources of different RATs, various aspects of the present disclosure can retain the use of the PDCCH resources, thereby facilitating the communication of DMRS and improving resource utilization within the wireless communication system. Therefore, by facilitating the communication of DMRS, various aspects of the present disclosure can improve the reliability and efficiency of wireless communications within a wireless communication system.

[0280] In some examples, the communication manager 1620 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise cooperating with the transceiver 1610, one or more antennas 1615 (e.g., where applicable), or any combination thereof. Although the communication manager 1620 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 1620 may be supported or performed by the processor 1635, the memory 1625, the code 1630, the transceiver 1610, or any combination thereof. For example, the code 1630 may include instructions that are executable by the processor 1635 to cause the device 1605 to perform various aspects of overlapping downlink control channels and CRS bandwidths as described herein, or the processor 1635 and the memory 1625 may be otherwise configured to perform or support such operations.

[0281] Fig.17 1700 according to one or more aspects of the present disclosure. The operations of the method 1700 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1700 may be implemented by a UE or a component thereof as described herein. Figures 1 to 12 The UE 115 described herein may be executed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0282] At 1705, the method may include receiving first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. The operations of 1705 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1705 may be performed as described in reference to Fig.11 The control signaling receiving manager 1125 is used to execute.

[0283] At 1710, the method may include receiving second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being for a second set of time-frequency resources that at least partially overlaps with at least one CCE of the one or more CCEs. The operations of 1710 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1710 may be performed as described in reference to Fig.11 The control signaling receiving manager 1125 is used to execute.

[0284] At 1715, the method may include receiving a DMRS within a third set of time-frequency resources according to a DMRS configuration identified for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources included within one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources. The operations of 1715 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1715 may be performed as described in reference to Fig.11 The DMRS reception manager 1130 is used to execute.

[0285] Fig.18 1800 according to one or more aspects of the present disclosure. The operations of the method 1800 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1800 may be implemented by a UE or a component thereof as described herein. Figures 1 to 12 The UE 115 described herein may be executed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0286] At 1805, the method may include receiving first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. The operations of 1805 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1805 may be performed as described in reference to Fig.11The control signaling receiving manager 1125 is used to execute.

[0287] At 1810, the method may include receiving second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being for a second set of time-frequency resources that at least partially overlaps with at least one CCE of the one or more CCEs. The operations of 1810 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1810 may be performed as described in reference to Fig.11 The control signaling receiving manager 1125 is used to execute.

[0288] At 1815, the method may include receiving a DMRS within a third set of time-frequency resources according to a DMRS configuration identified for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources included within one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources. The operations of 1815 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1815 may be performed as described in reference to Fig.11 The DMRS reception manager 1130 is used to execute.

[0289] At 1820, the method may include receiving a downlink control message within a portion of the first set of time-frequency resources that does not include the second set of time-frequency resources and the third set of time-frequency resources. The operations of 1820 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1820 may be performed as described in reference to Fig.11 The downlink control message receiving manager 1140 is used to execute.

[0290] Fig.19 A flow chart of a method 1900 for supporting overlapping downlink control channels and CRS bandwidth according to one or more aspects of the present disclosure is shown. The operations of the method 1900 may be implemented by a network entity or a component thereof as described herein. For example, the operations of the method 1900 may be implemented by a network entity or a component thereof as described herein. Figures 1 to 8 as well as Figures 13 to 16 In some examples, the network entity may execute an instruction set to control the functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform various aspects of the described functions.

[0291] At 1905, the method may include sending to the UE first control signaling indicating a downlink control channel configuration associated with the first RAT, the downlink control channel configuration being for a first set of time-frequency resources including one or more CCEs. The operations of 1905 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1905 may be performed as described in reference to Fig.15 The control signaling sending manager 1525 is used to execute.

[0292] At 1910, the method may include sending to the UE second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being for a second set of time-frequency resources that at least partially overlaps with at least one CCE of the one or more CCEs. The operations of 1910 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1910 may be performed as described in reference to Fig.15 The control signaling sending manager 1525 is used to execute.

[0293] At 1915, the method may include sending a DMRS to the UE in a third set of time-frequency resources according to a DMRS configuration identified for a downlink control channel based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources included in one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources. The operations of 1915 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1915 may be performed as described in reference to Fig.15 The DMRS sending manager 1530 is used to execute.

[0294] The following provides an overview of various aspects of the disclosure:

[0295] Aspect 1: A method for performing wireless communications at a UE, the method comprising: receiving first control signaling indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being used for a first set of time-frequency resources including one or more CCEs; receiving second control signaling indicating a CRS configuration associated with a second RAT, the CRS configuration being used for a second set of time-frequency resources that at least partially overlap with at least one of the one or more CCEs; and receiving DMRS within a third set of time-frequency resources based on a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel based at least partially on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0296] Aspect 2: A method according to Aspect 1, wherein the one or more CCEs span at least a first symbol period and a second symbol period, the second set of time-frequency resources configured by the CRS at least partially overlaps with a first portion of the one or more CCEs within the first symbol period, and the third set of time-frequency resources includes a second portion of the one or more CCEs within the second symbol period.

[0297] Aspect 3: A method according to Aspect 2, wherein the third set of time-frequency resources includes each time-frequency resource of the one or more CCEs within the second symbol period, and excludes each time-frequency resource of the one or more CCEs within the first symbol period based at least in part on the overlap of the second set of time-frequency resources configured by the CRS with at least a portion of at least one CCE within the first symbol period.

[0298] Aspect 4: A method according to any one of Aspects 1 to 3, wherein the one or more CCEs include a first CCE and a second CCE spanning at least a first symbol period and a second symbol period, the second set of time-frequency resources configured by the CRS at least partially overlaps with a first part of the first CCE in the first symbol period, and the third set of time-frequency resources includes the second CCE and a second part of the first CCE in the second symbol period.

[0299] Aspect 5: A method according to any one of Aspects 1 to 4, wherein the one or more CCEs include CCEs including a first REG cluster and a second REG cluster spanning at least a first symbol period and a second symbol period, the second set of time-frequency resources configured by the CRS at least partially overlaps with a first portion of the first REG cluster in the first symbol period, and the third set of time-frequency resources includes the second REG cluster and a second portion of the first REG cluster within the second symbol period.

[0300] Aspect 6: A method according to Aspect 5, wherein the second set of time-frequency resources of the CRS configuration overlaps with a first subset of the first part of the first REG bundle in the first symbol period, and the third set of time-frequency resources also includes a second subset of the first part of the first REG bundle in the first symbol period.

[0301] Aspect 7: According to the method described in any one of Aspects 1 to 6, the method further includes: processing a signal received within the one or more CCEs, wherein the one or more CCEs include a first set of CCEs of a first type and a second set of CCEs of a second type, wherein the first set of CCEs of the first type at least partially overlaps with the second set of time-frequency resources configured by the CRS, and wherein the second set of CCEs of the second type does not overlap with the second set of time-frequency resources configured by the CRS, wherein receiving the DMRS is at least partially based on the processing.

[0302] Aspect 8: According to the method described in Aspect 7, the method also includes: processing the signal received within a certain number of CCEs among the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the number of CCEs is less than or equal to a threshold number of CCEs of the first type and the second type that can be processed by the UE.

[0303] Aspect 9: According to the method described in any one of Aspects 7 to 8, the method further includes: processing the signals received within a first number of CCEs among the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the first number of CCEs is less than or equal to a first threshold number of CCEs of the first type that can be processed by the UE; and processing the signals received within a second number of CCEs among the one or more CCEs within the monitoring opportunity, the time slot, or both, wherein the second number of CCEs is less than or equal to a second threshold number of CCEs of the second type that can be processed by the UE.

[0304] Aspect 10: According to the method described in any one of Aspects 1 to 9, the method also includes processing a signal received within the one or more CCEs, wherein the one or more CCEs include a first set of CCEs of a first type, a second set of CCEs of a second type, and a third set of CCEs of a third type, wherein the first set of CCEs of the first type has a first level of overlap with the second set of time-frequency resources configured by the CRS, wherein the second set of CCEs of the second type has a second level of overlap with the second set of time-frequency resources configured by the CRS, and wherein the third set of CCEs of the third type does not overlap with the second set of time-frequency resources configured by the CRS, wherein receiving the DMRS is at least partially based on the processing.

[0305] Aspect 11: A method according to Aspect 10, wherein processing the signal includes: processing the signal received within a certain number of CCEs among the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the number of CCEs is less than or equal to a threshold number of CCEs of the first type, the second type, and the third type that can be processed by the UE.

[0306] Aspect 12: A method according to any one of Aspects 10 to 11, wherein processing the signal includes: processing the signal received within a first number of CCEs among the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the first number of CCEs is less than or equal to a first threshold number of CCEs of the first type that can be processed by the UE; processing the signal received within a second number of CCEs among the one or more CCEs within the monitoring opportunity, the time slot, or both, wherein the second number of CCEs is less than or equal to a second threshold number of CCEs of the second type that can be processed by the UE; and processing the signal received within a third number of CCEs among the one or more CCEs within the monitoring opportunity, the time slot, or both, wherein the third number of CCEs is less than or equal to a third threshold number of CCEs of the third type that can be processed by the UE.

[0307] Aspect 13: A method according to any one of Aspects 10 to 12, wherein processing the signal includes: processing the signal received within a first number of CCEs in the one or more CCEs within a monitoring opportunity, a time slot, or both, wherein the first number of CCEs is less than or equal to a first threshold number of CCEs of the first type and the second type that can be processed by the UE; and processing the signal received within a second number of CCEs in the one or more CCEs within the monitoring opportunity, the time slot, or both, wherein the second number of CCEs is less than or equal to a second threshold number of CCEs of the second type that can be processed by the UE.

[0308] Aspect 14: According to the method described in any one of Aspects 1 to 13, the method further includes: receiving a downlink control message in a portion of the first set of time-frequency resources that does not include the second set of time-frequency resources and the third set of time-frequency resources.

[0309] Aspect 15: A method according to any one of Aspects 1 to 14, wherein the first RAT includes a 5G RAT, a NR access technology, or any combination thereof, and the second RAT includes a 4G RAT, a LTE RAT, or any combination thereof.

[0310] Aspect 16: A method for performing wireless communications at a UE, the method comprising: sending a first control signaling to the UE indicating a downlink control channel configuration associated with a first RAT, the downlink control channel configuration being used for a first set of time-frequency resources including one or more CCEs; sending a second control signaling to the UE indicating a CRS configuration associated with a second RAT, the CRS configuration being used for a second set of time-frequency resources that at least partially overlap with at least one CCE of the one or more CCEs; and sending a DMRS to the UE within a third set of time-frequency resources based on a DMRS configuration identified for a third set of time-frequency resources for a downlink control channel at least partially based on the downlink control channel configuration and the CRS configuration, the third set of time-frequency resources being included in the one or more CCEs of the first set of time-frequency resources that do not include the second set of time-frequency resources.

[0311] Aspect 17: A method according to Aspect 16, wherein the one or more CCEs span at least a first symbol period and a second symbol period, the second set of time-frequency resources of the CRS configuration at least partially overlaps with a first portion of the one or more CCEs within the first symbol period, and the third set of time-frequency resources includes a second portion of the one or more CCEs within the second symbol period.

[0312] Aspect 18: A method according to Aspect 17, wherein the third set of time-frequency resources includes each time-frequency resource of the one or more CCEs within the second symbol period, and excludes each time-frequency resource of the one or more CCEs within the first symbol period based at least in part on the overlap of the second set of time-frequency resources of the CRS configuration with at least a portion of at least one CCE within the first symbol period.

[0313] Aspect 19: A method according to any one of Aspects 16 to 18, wherein the one or more CCEs include a first CCE and a second CCE spanning at least a first symbol period and a second symbol period, the second set of time-frequency resources configured by the CRS at least partially overlaps with a first portion of the first CCE in the first symbol period, and the third set of time-frequency resources includes the second CCE and a second portion of the first CCE within the second symbol period.

[0314] Aspect 20: A method according to any one of Aspects 16 to 19, wherein the one or more CCEs include CCEs including a first REG cluster and a second REG cluster spanning at least a first symbol period and a second symbol period, the second set of time-frequency resources of the CRS configuration at least partially overlaps with a first portion of the first REG cluster in the first symbol period, and the third set of time-frequency resources includes the second REG cluster and a second portion of the first REG cluster within the second symbol period.

[0315] Aspect 21: A method according to Aspect 20, wherein the second set of time-frequency resources of the CRS configuration overlaps with a first subset of the first part of the first REG bundle in the first symbol period, and the third set of time-frequency resources also includes a second subset of the first part of the first REG bundle in the first symbol period.

[0316] Aspect 22: According to the method described in any one of Aspects 16 to 21, the method further includes: sending a downlink control message to the UE within a portion of the first set of time-frequency resources that does not include the second set of time-frequency resources and the third set of time-frequency resources.

[0317] Aspect 23: An apparatus for performing wireless communications at a UE, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 1 to 15.

[0318] Aspect 24: An apparatus for wireless communication at a UE, the apparatus comprising at least one means for performing the method according to any one of aspects 1 to 15.

[0319] Aspect 25: A non-transitory computer-readable medium storing a code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method according to any one of aspects 1 to 15.

[0320] Aspect 26: An apparatus for performing wireless communications at a UE, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 16 to 22.

[0321] Aspect 27: An apparatus for wireless communication at a UE, the apparatus comprising at least one means for performing a method according to any one of aspects 16 to 22.

[0322] Aspect 28: A non-transitory computer-readable medium storing a code for wireless communication at a UE, the code comprising instructions executable by a processor to perform a method according to any one of aspects 16 to 22.

[0323] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified and that other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0324] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0325] The information and signals described herein may be represented using any of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the specification may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0326] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed using a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration).

[0327] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as one or more instructions or codes of a computer-readable medium, or sent using the one or more instructions or codes. Other examples and specific implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hard wiring, or any combination of these items. Features that implement the functions may also be physically located at different locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0328] Computer-readable medium includes both non-transient computer storage medium and communication medium, including any medium that facilitates computer program to be transmitted from one position to another position.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.In an example and not limited way, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage device, or can be used for carrying or storing desired program code components and can be accessed by general or special-purpose computer or general or special-purpose processor in the form of instruction or data structure Any other non-transient medium.Moreover, any connection is appropriately referred to as computer-readable medium.For example, if software is sent from website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer-readable medium. As used herein, disks and optical disks include CDs, laser disks, optical disks, digital versatile disks (DVDs), floppy disks, and Blu-ray disks. Disks can reproduce data magnetically, and optical disks can reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0329] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on 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 "based at least in part on."

[0330] The term "determining" encompasses a variety of actions, and thus, "determining" may include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, database or other data structure), ascertaining, etc. Additionally, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data stored in a memory), etc. Additionally, "determining" may include parsing, retrieving, selecting, choosing, establishing, and other such similar actions.

[0331] In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by following the reference label with a dash and a second label to distinguish between similar components. If only the first reference label is used in the specification, the description may apply to any of the similar components having the same first reference label regardless of the second reference label, or other subsequent reference labels.

[0332] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "having advantages over other examples." The specific embodiments include specific details to provide an understanding of the described technology. However, these technologies may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0333] The description herein is provided to enable one of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: at least one processor; at least one memory coupled to the at least one processor; and instructions stored in the at least one memory and executable by the at least one processor to cause the apparatus to: receiving first control signaling indicating a downlink control channel configuration associated with a first radio access technology, the downlink control channel configuration being for a first set of time-frequency resources comprising one or more control channel elements; receiving second control signaling indicating a cell-specific reference signal configuration associated with a second radio access technology, the cell-specific reference signal configuration being for a second set of time-frequency resources at least partially overlapping with at least one of the one or more control channel elements; as well as A demodulation reference signal is received within a third set of time-frequency resources according to a demodulation reference signal configuration identified for a downlink control channel based at least in part on the downlink control channel configuration and the cell-specific reference signal configuration, the third set of time-frequency resources being included within the one or more control channel elements of the first set of time-frequency resources that do not include the second set of time-frequency resources.

2. The apparatus of claim 1 , wherein the one or more control channel elements span at least a first symbol period and a second symbol period, wherein the second set of time-frequency resources of the cell-specific reference signal configuration at least partially overlaps with a first portion of the one or more control channel elements within the first symbol period, and wherein the third set of time-frequency resources includes a second portion of the one or more control channel elements within the second symbol period.

3. The apparatus of claim 2 , wherein the third set of time-frequency resources includes each time-frequency resource of the one or more control channel elements within the second symbol period, and excludes each time-frequency resource of the one or more control channel elements within the first symbol period based at least in part on an overlap between the second set of time-frequency resources configured for the cell-specific reference signal and at least a portion of at least one control channel element within the first symbol period.

4. The apparatus of claim 1 , wherein the one or more control channel elements include a first control channel element and a second control channel element spanning at least a first symbol period and a second symbol period, wherein the second set of time-frequency resources of the cell-specific reference signal configuration at least partially overlaps with a first portion of the first control channel element in the first symbol period, and wherein the third set of time-frequency resources includes the second control channel element and a second portion of the first control channel element within the second symbol period.

5. The apparatus of claim 1 , wherein the one or more control channel elements include control channel elements comprising a first resource element group bundle and a second resource element group bundle spanning at least a first symbol period and a second symbol period, wherein the second set of time-frequency resources of the cell-specific reference signal configuration at least partially overlaps with a first portion of the first resource element group bundle in the first symbol period, and wherein the third set of time-frequency resources includes the second resource element group bundle and a second portion of the first resource element group bundle within the second symbol period.

6. An apparatus according to claim 5, wherein the second set of time-frequency resources of the cell-specific reference signal configuration overlaps with a first subset of the first part of the first resource element group bundle in the first symbol period, and wherein the third set of time-frequency resources also includes a second subset of the first part of the first resource element group bundle in the first symbol period.

7. The apparatus of claim 1, wherein the instructions are further executable by the at least one processor to cause the apparatus to: processing signals received within the one or more control channel elements, wherein the one or more control channel elements include a first set of control channel elements of a first type and a second set of control channel elements of a second type, wherein the first set of control channel elements of the first type at least partially overlaps with the second set of time-frequency resources of the cell-specific reference signal configuration, and wherein the second set of control channel elements of the second type does not overlap with the second set of time-frequency resources of the cell-specific reference signal configuration, wherein receiving the demodulation reference signal is based at least in part on the processing.

8. The apparatus of claim 7, wherein the instructions are further executable by the at least one processor to cause the apparatus to: Processing the signals received within a number of the one or more control channel elements within a monitoring occasion, a time slot, or both, wherein the number of control channel elements is less than or equal to a threshold number of control channel elements of the first type and the second type that can be processed by the UE.

9. The apparatus of claim 7, wherein the instructions are further executable by the at least one processor to cause the apparatus to: processing, within a monitoring occasion, a time slot, or both, the signals received within a first number of the one or more control channel elements, wherein the first number of control channel elements is less than or equal to a first threshold number of control channel elements of the first type that can be processed by the UE; and Processing the signals received within a second number of control channel elements among the one or more control channel elements within the monitoring occasion, the time slot, or both, wherein the second number of control channel elements is less than or equal to a second threshold number of control channel elements of the second type that can be processed by the UE.

10. The apparatus of claim 1, wherein the instructions are further executable by the at least one processor to cause the apparatus to: Processing signals received within the one or more control channel elements, wherein the one or more control channel elements include a first set of control channel elements of a first type, a second set of control channel elements of a second type, and a third set of control channel elements of a third type, wherein the first set of control channel elements of the first type has a first level of overlap with the second set of time-frequency resources of the cell-specific reference signal configuration, wherein the second set of control channel elements of the second type has a second level of overlap with the second set of time-frequency resources of the cell-specific reference signal configuration, and wherein the third set of control channel elements of the third type does not overlap with the second set of time-frequency resources of the cell-specific reference signal configuration, wherein receiving the demodulation reference signal is at least partially based on the processing.

11. The apparatus of claim 10, wherein the instructions for processing the signal are executable by the at least one processor to cause the apparatus to: Processing the signals received within a certain number of control channel elements among the one or more control channel elements within a monitoring occasion, a time slot, or both, wherein the number of control channel elements is less than or equal to a threshold number of control channel elements of the first type, the second type, and the third type that can be processed by the UE.

12. The apparatus of claim 10, wherein the instructions for processing the signal are executable by the at least one processor to cause the apparatus to: processing, within a monitoring occasion, a time slot, or both, the signals received within a first number of control channel elements of the one or more control channel elements, wherein the first number of control channel elements is less than or equal to a first threshold number of control channel elements of the first type that can be processed by the UE; processing, within the monitoring occasion, the time slot, or both, the signals received within a second number of control channel elements of the one or more control channel elements, wherein the second number of control channel elements is less than or equal to a second threshold number of control channel elements of the second type that can be processed by the UE; and Processing the signals received within a third number of control channel elements among the one or more control channel elements within the monitoring opportunity, the time slot, or both, wherein the third number of control channel elements is less than or equal to a third threshold number of control channel elements of the third type that can be processed by the UE.

13. The apparatus of claim 10, wherein the instructions for processing the signal are executable by the at least one processor to cause the apparatus to: processing, within a monitoring occasion, a time slot, or both, the signals received within a first number of the one or more control channel elements, wherein the first number of control channel elements is less than or equal to a first threshold number of control channel elements of the first type and the second type that can be processed by the UE; and Processing the signals received within a second number of control channel elements among the one or more control channel elements within the monitoring occasion, the time slot, or both, wherein the second number of control channel elements is less than or equal to a second threshold number of control channel elements of the second type that can be processed by the UE.

14. The apparatus of claim 1, wherein the instructions are further executable by the at least one processor to cause the apparatus to: A downlink control message is received within a portion of the first set of time-frequency resources excluding the second set of time-frequency resources and the third set of time-frequency resources.

15. The apparatus of claim 1, wherein the first radio access technology comprises a fifth generation radio access technology, a new radio access technology, or any combination thereof, and wherein the second radio access technology comprises a fourth generation radio access technology, a long term evolution radio access technology, or any combination thereof.

16. An apparatus for wireless communication at a network entity, the apparatus comprising: at least one processor; at least one memory coupled to the at least one processor; and instructions stored in the at least one memory and executable by the at least one processor to cause the apparatus to: sending first control signaling to a user equipment (UE) indicating a downlink control channel configuration associated with a first radio access technology, the downlink control channel configuration being for a first set of time-frequency resources including one or more control channel elements; sending, to the UE, second control signaling indicating a cell-specific reference signal configuration associated with a second radio access technology, the cell-specific reference signal configuration being for a second set of time-frequency resources at least partially overlapping with at least one of the one or more control channel elements; as well as Send a demodulation reference signal to the UE within a third set of time-frequency resources according to a demodulation reference signal configuration identified for a downlink control channel based at least in part on the downlink control channel configuration and the cell-specific reference signal configuration, the third set of time-frequency resources being included within the one or more control channel elements of the first set of time-frequency resources that do not include the second set of time-frequency resources.

17. The apparatus of claim 16, wherein the one or more control channel elements span at least a first symbol period and a second symbol period, wherein the second set of time-frequency resources of the cell-specific reference signal configuration at least partially overlaps with a first portion of the one or more control channel elements within the first symbol period, and wherein the third set of time-frequency resources includes a second portion of the one or more control channel elements within the second symbol period.

18. The apparatus of claim 17, wherein the third set of time-frequency resources includes each time-frequency resource of the one or more control channel elements within the second symbol period, and excludes each time-frequency resource of the one or more control channel elements within the first symbol period based at least in part on an overlap between the second set of time-frequency resources configured for the cell-specific reference signal and at least a portion of at least one control channel element within the first symbol period.

19. The apparatus of claim 16, wherein the one or more control channel elements include a first control channel element and a second control channel element spanning at least a first symbol period and a second symbol period, wherein the second set of time-frequency resources of the cell-specific reference signal configuration at least partially overlaps with a first portion of the first control channel element in the first symbol period, and wherein the third set of time-frequency resources includes the second control channel element and a second portion of the first control channel element within the second symbol period.

20. The apparatus of claim 16, wherein the one or more control channel elements include control channel elements comprising a first resource element group bundle and a second resource element group bundle spanning at least a first symbol period and a second symbol period, wherein the second set of time-frequency resources of the cell-specific reference signal configuration at least partially overlaps with a first portion of the first resource element group bundle in the first symbol period, and wherein the third set of time-frequency resources includes the second resource element group bundle and a second portion of the first resource element group bundle within the second symbol period.

21. An apparatus according to claim 20, wherein the second set of time-frequency resources of the cell-specific reference signal configuration overlaps with a first subset of the first portion of the first resource element group bundle in the first symbol period, and wherein the third set of time-frequency resources also includes a second subset of the first portion of the first resource element group bundle in the first symbol period.

22. The apparatus of claim 16, wherein the instructions are further executable by the at least one processor to cause the apparatus to: A downlink control message is sent to the UE within a portion of the first set of time-frequency resources excluding the second set of time-frequency resources and the third set of time-frequency resources.

23. A method for wireless communication at a user equipment (UE), the method comprising: receiving first control signaling indicating a downlink control channel configuration associated with a first radio access technology, the downlink control channel configuration being for a first set of time-frequency resources comprising one or more control channel elements; receiving second control signaling indicating a cell-specific reference signal configuration associated with a second radio access technology, the cell-specific reference signal configuration being for a second set of time-frequency resources at least partially overlapping with at least one of the one or more control channel elements; as well as A demodulation reference signal is received within a third set of time-frequency resources according to a demodulation reference signal configuration identified for a downlink control channel based at least in part on the downlink control channel configuration and the cell-specific reference signal configuration, the third set of time-frequency resources being included within the one or more control channel elements of the first set of time-frequency resources that do not include the second set of time-frequency resources.

24. The method of claim 23, wherein the one or more control channel elements span at least a first symbol period and a second symbol period, wherein the second set of time-frequency resources of the cell-specific reference signal configuration at least partially overlaps with a first portion of the one or more control channel elements within the first symbol period, and wherein the third set of time-frequency resources includes a second portion of the one or more control channel elements within the second symbol period.

25. The method of claim 24, wherein the third set of time-frequency resources includes each time-frequency resource of the one or more control channel elements within the second symbol period, and excludes each time-frequency resource of the one or more control channel elements within the first symbol period based at least in part on an overlap between the second set of time-frequency resources configured for the cell-specific reference signal and at least a portion of at least one control channel element within the first symbol period.

26. The method of claim 23, wherein the one or more control channel elements include a first control channel element and a second control channel element spanning at least a first symbol period and a second symbol period, wherein the second set of time-frequency resources of the cell-specific reference signal configuration at least partially overlaps with a first portion of the first control channel element in the first symbol period, and wherein the third set of time-frequency resources includes the second control channel element and a second portion of the first control channel element within the second symbol period.

27. A method according to claim 23, wherein the one or more control channel elements include control channel elements including a first resource element group bundle and a second resource element group bundle spanning at least a first symbol period and a second symbol period, wherein the second set of time-frequency resources of the cell-specific reference signal configuration at least partially overlaps with a first portion of the first resource element group bundle in the first symbol period, and wherein the third set of time-frequency resources includes the second resource element group bundle and a second portion of the first resource element group bundle within the second symbol period.

28. A method according to claim 27, wherein the second set of time-frequency resources of the cell-specific reference signal configuration overlaps with a first subset of the first part of the first resource element group bundle in the first symbol period, and wherein the third set of time-frequency resources also includes a second subset of the first part of the first resource element group bundle in the first symbol period.

29. The method of claim 23, further comprising: processing signals received within the one or more control channel elements, wherein the one or more control channel elements include a first set of control channel elements of a first type and a second set of control channel elements of a second type, wherein the first set of control channel elements of the first type at least partially overlaps with the second set of time-frequency resources of the cell-specific reference signal configuration, and wherein the second set of control channel elements of the second type does not overlap with the second set of time-frequency resources of the cell-specific reference signal configuration, wherein receiving the demodulation reference signal is based at least in part on the processing.

30. A method for wireless communication at a network entity, the method comprising: sending first control signaling to a user equipment (UE) indicating a downlink control channel configuration associated with a first radio access technology, the downlink control channel configuration being for a first set of time-frequency resources including one or more control channel elements; sending, to the UE, second control signaling indicating a cell-specific reference signal configuration associated with a second radio access technology, the cell-specific reference signal configuration being for a second set of time-frequency resources at least partially overlapping with at least one of the one or more control channel elements; as well as Send a demodulation reference signal to the UE within a third set of time-frequency resources according to a demodulation reference signal configuration identified for a downlink control channel based at least in part on the downlink control channel configuration and the cell-specific reference signal configuration, the third set of time-frequency resources being included within the one or more control channel elements of the first set of time-frequency resources that do not include the second set of time-frequency resources.

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