Cross-link interference measurement in half-duplex carrier aggregation
By implementing rules to restrict communication on a second band during CLI measurements on a first band for UEs with directional collision handling, the ambiguity in CLI measurement prioritization is resolved, enhancing throughput and CLI mitigation in wireless networks.
Patent Information
- Application Number
- PCT/CN2024/079205
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2025-09-04
AI Technical Summary
Ambiguity in how to prioritize cross-link interference (CLI) measurements and other communications in wireless networks, particularly for UEs capable of directional collision handling but not inter-band full-duplex communication, leads to inefficient CLI measurement and communication failures in carrier aggregation.
Implement rules for resolving potential collisions by restricting communication on a second band while performing CLI measurements on a first band, based on whether the CLI cell and/or the second band is a half-duplex TDD CA cell, and prioritizing measurements according to the reference cell's band.
Enhances throughput and improves CLI mitigation by reducing complexity and ensuring proper scheduling restrictions, thus optimizing network performance for UEs with directional collision handling capabilities.
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Figure CN2024079205_04092025_PF_FP_ABST
Abstract
Description
CROSS-LINK INTERFERENCE MEASUREMENT IN HALF-DUPLEX CARRIER AGGREGATION
[0001] FIELD OF THE DISCLOSURE
[0002] Aspects of the present disclosure generally relate to wireless communication and specifically relate to techniques, apparatuses, and methods for cross-link interference measurement in half-duplex carrier aggregation.BACKGROUND
[0003] Wireless communication systems are widely deployed to provide various services that may include carrying voice, text, messaging, video, data, and / or other traffic. The services may include unicast, multicast, and / or broadcast services, among other examples. Typical wireless communication systems may employ multiple-access radio access technologies (RATs) capable of supporting communication with multiple users by sharing available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, and / or device transmit power, among other examples) . Examples of such multiple-access RATs include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
[0004] The above multiple-access RATs have been adopted in various telecommunication standards to provide common protocols that enable different wireless communication devices to communicate on a municipal, national, regional, or global level. An example telecommunication standard is New Radio (NR) . NR, which may also be referred to as 5G, is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . NR (and other mobile broadband evolutions beyond NR) may be designed to better support Internet of things (IoT) and reduced capability device deployments, industrial connectivity, millimeter wave (mmWave) expansion, licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployment, sidelink and other device-to-device direct communication technologies (for example, cellular vehicle-to-everything (CV2X) communication) , massive multiple-input multiple-output (MIMO) , disaggregated network architectures and network topology expansions, multiple-subscriber implementations, high-precision positioning, and / or radio frequency (RF) sensing, among other examples. As the demand for mobile broadband access continues to increase, further improvements in NR may be implemented, and other radio access technologies such as 6G may be introduced, to further advance mobile broadband evolution.SUMMARY
[0005] In some aspects, a method of wireless communication performed by a user equipment (UE) includes transmitting capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; receiving a configuration of a cross-link interference (CLI) measurement on a first time resource of a CLI cell in a first band; and performing the CLI measurement in the first band, wherein scheduling on a second time resource of a time division duplexing (TDD) cell in a second band is restricted in association with the first time re source.
[0006] In some aspects, a method of wireless communication performed by a UE includes transmitting capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; receiving a configuration of a CLI measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex TDD carrier aggregation cell associated with a carrier aggregation configuration of the UE; and performing the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the UE is in the first band or the second band.
[0007] In some aspects, a method of wireless communication performed by a network node includes receiving capability information indicating that a UE supports directional collision handling for half-duplex carrier aggregation within a cell group; and transmitting a configuration of a CLI measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource.
[0008] In some aspects, an apparatus for wireless communication at a UE includes one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the UE to: transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; receive a configuration of a CLI measurement on a first time resource of a CLI cell in a first band; and perform the CLI measurement in the first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource.
[0009] In some aspects, an apparatus for wireless communication at a UE includes one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the UE to: transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; receive a configuration of a CLI measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex TDD carrier aggregation cell associated with a carrier aggregation configuration of the UE; and perform the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the UE is in the first band or the second band.
[0010] In some aspects, an apparatus for wireless communication at a network node includes one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the network node to: receive capability information indicating that a UE supports directional collision handling for half-duplex carrier aggregation within a cell group; and transmit a configuration of a CLI measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time re source.
[0011] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; receive a configuration of a CLI measurement on a first time resource of a CLI cell in a first band; and perform the CLI measurement in the first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource.
[0012] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; receive a configuration of a CLI measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex TDD carrier aggregation cell associated with a carrier aggregation configuration of the UE; and perform the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the UE is in the first band or the second band.
[0013] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a network node, cause the network node to: receive capability information indicating that a UE supports directional collision handling for half-duplex carrier aggregation within a cell group; and transmit a configuration of a CLI measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource.
[0014] In some aspects, an apparatus for wireless communication includes means for transmitting capability information indicating that the apparatus supports directional collision handling for half-duplex carrier aggregation within a cell group; means for receiving a configuration of a CLI measurement on a first time resource of a CLI cell in a first band; and means for performing the CLI measurement in the first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource.
[0015] In some aspects, an apparatus for wireless communication includes means for transmitting capability information indicating that the apparatus supports directional collision handling for half-duplex carrier aggregation within a cell group; means for receiving a configuration of a CLI measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex TDD carrier aggregation cell associated with a carrier aggregation configuration of the UE; and means for performing the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the apparatus is in the first band or the second band.
[0016] In some aspects, an apparatus for wireless communication includes means for receiving capability information indicating that a UE supports directional collision handling for half-duplex carrier aggregation within a cell group; and means for transmitting a configuration of a CLI measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource.
[0017] Aspects of the present disclosure may generally be implemented by or as a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network node, network entity, wireless communication device, and / or processing system as substantially described with reference to, and as illustrated by, the specification and accompanying drawings.
[0018] The foregoing paragraphs of this section have broadly summarized some aspects of the present disclosure. These and additional aspects and associated advantages will be described hereinafter. The disclosed aspects may be used as a basis for modifying or designing other aspects for carrying out the same or similar purposes of the present disclosure. Such equivalent aspects do not depart from the scope of the appended claims. Characteristics of the aspects disclosed herein, both their organization and method of operation, together with associated advantages, will be better understood from the following description when considered in connection with the accompanying drawings.BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The appended drawings illustrate some aspects of the present disclosure, but are not limiting of the scope of the present disclosure because the description may enable other aspects. Each of the drawings is provided for purposes of illustration and description, and not as a definition of the limits of the claims. The same or similar reference numbers in different drawings may identify the same or similar elements.
[0020] Fig. 1 is a diagram illustrating an example of a wireless communication network in accordance with the present disclosure.
[0021] Fig. 2 is a diagram illustrating an example network node in communication with an example user equipment (UE) in a wireless network in accordance with the present disclosure.
[0022] Fig. 3 is a diagram illustrating an example disaggregated base station architecture in accordance with the present disclosure.
[0023] Fig. 4 is a diagram illustrating an example of a slot format used to schedule UE communications, in accordance with the present disclosure.
[0024] Fig. 5 is a diagram illustrating examples relating to UE-to-UE cross-link interference (CLI) , in accordance with the present disclosure.
[0025] Fig. 6 is a diagram illustrating examples of timing differences between cells for CLI measurement, in accordance with the present disclosure.
[0026] Fig. 7 is a diagram illustrating examples of carrier aggregation (CA) , in accordance with the present disclosure.
[0027] Fig. 8 is a diagram illustrating examples of reference cells for half-duplex (HD) CA.
[0028] Fig. 9 is a diagram illustrating an example of CLI measurement in HD CA, in accordance with the present disclosure.
[0029] Fig. 10 is a diagram illustrating an example of CLI measurement in HD CA, in accordance with the present disclosure.
[0030] Fig. 11 is a diagram illustrating an example process performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure.
[0031] Fig. 12 is a diagram illustrating an example process performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure.
[0032] Fig. 13 is a diagram illustrating an example process performed, for example, at a network node or an apparatus of a network node, in accordance with the present disclosure.
[0033] Fig. 14 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.
[0034] Fig. 15 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.DETAILED DESCRIPTION
[0035] Various aspects of the present disclosure are described hereinafter with reference to the accompanying drawings. However, aspects of the present disclosure may be embodied in many different forms and is not to be construed as limited to any specific aspect illustrated by or described with reference to an accompanying drawing or otherwise presented in this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art may appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using various combinations or quantities of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover an apparatus having, or a method that is practiced using, other structures and / or functionalities in addition to or other than the structures and / or functionalities with which various aspects of the disclosure set forth herein may be practiced. Any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
[0036] Several aspects of telecommunication systems will now be presented with reference to various methods, operations, apparatuses, and techniques. These methods, operations, apparatuses, and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or a combination of hardware and software. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0037] A user equipment (UE) may have various capabilities regarding communication features of the UE. As one example, some UEs may support full-duplex communication in different frequency bands (that is, simultaneous transmission in one frequency band and reception in another frequency band) , whereas other UEs may support only half-duplex communication in different frequency bands. As another example, some UEs may support directional collision handling between cells of a carrier aggregation (CA) configuration for the purpose of implementing half-duplex operation in CA. Directional collision handling involves resolving a potential collision between communications on two cells of a CA configuration according to certain rules, described elsewhere herein. Directional collision handling simplifies network operation by relaxing a requirement that the network properly configure a set of cells for CA for a UE that is only capable of half-duplex communication on the set of cells.
[0038] “Cross-link interference” (CLI) may refer to interference at a victim UE caused by a transmission of an aggressor UE. It may be beneficial for the victim UE to measure the CLI. Therefore, a network node may configure a CLI measurement for the victim UE on a serving cell of the victim UE. The CLI measurement may occur on a CLI measurement resource, also referred to as a CLI measurement occasion.
[0039] The CLI measurement resource is generally expected not to align in time with other communications on the serving cell on which the CLI measurement resource is configured, or with timing of other serving cells of the UE, because a signal causing the CLI is expected to have a different propagation delay than the serving cells of the UE (since the CLI-causing signal does not originate from any serving cell of the UE) . Thus, certain rules have been defined to specify whether the CLI measurement, or another communication, should be performed in a resource where a collision between the CLI measurement and another communication may occur.
[0040] Ambiguity may arise in how CLI measurements should be prioritized when a UE supports directional collision handling and half-duplex time division duplexing (TDD) CA within a band, and does not support simultaneous transmission and reception across multiple bands. For example, the rules mentioned above may be readily extended to a case where the UE does support simultaneous transmission and reception across multiple bands, but may be undefined when the UE does not support simultaneous transmission or reception across multiple bands. This ambiguity may lead to inefficient CLI measurement and failure to mitigate CLI. Furthermore, this ambiguity may lead to failure of other communications in carrier aggregation, thereby negatively impacting throughput.
[0041] Aspects of the present disclosure relate generally to resolving potential collisions between CLI measurements and other communications. Some aspects more specifically relate to rules for resolving these potential collisions for a UE that is capable of directional collision handling and that does not support inter-band full-duplex communication. In some aspects, communication on cells of a second band is restricted while the UE (that is capable of directional collision handling and that does not support inter-band full-duplex communication) performs CLI measurement on a cell configured for CLI measurement (a “CLI cell” ) in a first band. In some aspects, this restriction may be based on whether the CLI cell (or a cell in the first band) is configured as a half-duplex TDD CA cell (defined elsewhere herein) . Additionally, or alternatively, this restriction may be based on whether a cell in the second band is a half-duplex (HD) TDD CA cell. In some aspects, prioritization of the CLI measurement on the first band or another communication on a second band is in accordance with whether a reference cell of the UE is in the first band or the second band.
[0042] Aspects of the present disclosure may be used to realize one or more of the following potential advantages. In some aspects, by providing rules for resolving potential collision between CLI measurements and other communications for a UE that is capable of directional collision handling and that does not support inter-band full-duplex communication, throughput is increased and CLI mitigation is improved. By restricting communication on the second band while the UE performs CLI measurement on the first band, complexity is reduced relative to more complex approaches for prioritizing. Furthermore, the complexity can be manipulated by basing the restriction on whether the CLI cell and / or the cell in the second band is the HD TDD CA cell. In some aspects, by prioritizing the CLI measurement on the first band or another communication on a second band in accordance with whether a reference cell of the UE is in the first band or the second band, scheduling restriction is reduced relative to an approach where the communication is always restricted on the second band while the UE performs the CLI measurement on the first band.
[0043] Multiple-access radio access technologies (RATs) have been adopted in various telecommunication standards to provide common protocols that enable wireless communication devices to communicate on a municipal, enterprise, national, regional, or global level. For example, 5G New Radio (NR) is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . 5G NR supports various technologies and use cases including enhanced mobile broadband (eMBB) , ultra-reliable low-latency communication (URLLC) , massive machine-type communication (mMTC) , millimeter wave (mmWave) technology, beamforming, network slicing, edge computing, Internet of Things (IoT) connectivity and management, and network function virtualization (NFV) .
[0044] As the demand for broadband access increases and as technologies supported by wireless communication networks evolve, further technological improvements may be adopted in or implemented for 5G NR or future RATs, such as 6G, to further advance the evolution of wireless communication for a wide variety of existing and new use cases and applications. Such technological improvements may be associated with new frequency band expansion, licensed and unlicensed spectrum access, overlapping spectrum use, small cell deployments, non-terrestrial network (NTN) deployments, disaggregated network architectures and network topology expansion, device aggregation, advanced duplex communication, sidelink and other device-to-device direct communication, IoT (including passive or ambient IoT) networks, reduced capability (RedCap) UE functionality, industrial connectivity, multiple-subscriber implementations, high-precision positioning, radio frequency (RF) sensing, and / or artificial intelligence or machine learning (AI / ML) , among other examples. These technological improvements may support use cases such as wireless backhauls, wireless data centers, extended reality (XR) and metaverse applications, meta services for supporting vehicle connectivity, holographic and mixed reality communication, autonomous and collaborative robots, vehicle platooning and cooperative maneuvering, sensing networks, gesture monitoring, human-brain interfacing, digital twin applications, asset management, and universal coverage applications using non-terrestrial and / or aerial platforms, among other examples. The methods, operations, apparatuses, and techniques described herein may enable one or more of the foregoing technologies and / or support one or more of the foregoing use cases.
[0045] Fig. 1 is a diagram illustrating an example of a wireless communication network 100 in accordance with the present disclosure. The wireless communication network 100 may be or may include elements of a 5G (or NR) network or a 6G network, among other examples. The wireless communication network 100 may include multiple network nodes 110, shown as a network node (NN) 110a, a network node 110b, a network node 110c, and a network node 110d. The network nodes 110 may support communications with multiple UEs 120, shown as a UE 120a, a UE 120b, a UE 120c, a UE 120d, and a UE 120e.
[0046] The network nodes 110 and the UEs 120 of the wireless communication network 100 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, carriers, and / or channels. For example, devices of the wireless communication network 100 may communicate using one or more operating bands. In some aspects, multiple wireless networks 100 may be deployed in a given geographic area. Each wireless communication network 100 may support a particular RAT (which may also be referred to as an air interface) and may operate on one or more carrier frequencies in one or more frequency ranges. Examples of RATs include a 4G RAT, a 5G / NR RAT, and / or a 6G RAT, among other examples. In some examples, when multiple RATs are deployed in a given geographic area, each RAT in the geographic area may operate on different frequencies to avoid interference with one another.
[0047] Various operating bands have been defined as frequency range designations FR1 (410 MHz through 7.125 GHz) , FR2 (24.25 GHz through 52.6 GHz) , FR3 (7.125 GHz through 24.25 GHz) , FR4a or FR4-1 (52.6 GHz through 71 GHz) , FR4 (52.6 GHz through 114.25 GHz) , and FR5 (114.25 GHz through 300 GHz) . Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in some documents and articles. Similarly, FR2 is often referred to (interchangeably) as a “millimeter wave” band in some documents and articles, despite being different than the extremely high frequency (EHF) band (30 GHz through 300 GHz) , which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band. The frequencies between FR1 and FR2 are often referred to as mid-band frequencies, which include FR3. Frequency bands falling within FR3 may inherit FR1 characteristics or FR2 characteristics, and thus may effectively extend features of FR1 or FR2 into mid-band frequencies. Thus, “sub-6 GHz, ” if used herein, may broadly refer to frequencies that are less than 6 GHz, that are within FR1, and / or that are included in mid-band frequencies. Similarly, the term “millimeter wave, ” if used herein, may broadly refer to frequencies that are included in mid-band frequencies, that are within FR2, FR4, FR4-a or FR4-1, or FR5, and / or that are within the EHF band. Higher frequency bands may extend 5G NR operation, 6G operation, and / or other RATs beyond 52.6 GHz. For example, each of FR4a, FR4-1, FR4, and FR5 falls within the EHF band. In some examples, the wireless communication network 100 may implement dynamic spectrum sharing (DSS) , in which multiple RATs (for example, 4G / LTE and 5G / NR) are implemented with dynamic bandwidth allocation (for example, based on user demand) in a single frequency band. It is contemplated that the frequencies included in these operating bands (for example, FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) may be modified, and techniques described herein may be applicable to those modified frequency ranges.
[0048] A network node 110 may include one or more devices, components, or systems that enable communication between a UE 120 and one or more devices, components, or systems of the wireless communication network 100. A network node 110 may be, may include, or may also be referred to as an NR network node, a 5G network node, a 6G network node, a Node B, an eNB, a gNB, an access point (AP) , a transmission reception point (TRP) , a mobility element, a core, a network entity, a network element, a network equipment, and / or another type of device, component, or system included in a radio access network (RAN) .
[0049] A network node 110 may be implemented as a single physical node (for example, a single physical structure) or may be implemented as two or more physical nodes (for example, two or more distinct physical structures) . For example, a network node 110 may be a device or system that implements part of a radio protocol stack, a device or system that implements a full radio protocol stack (such as a full gNB protocol stack) , or a collection of devices or systems that collectively implement the full radio protocol stack. For example, and as shown, a network node 110 may be an aggregated network node (having an aggregated architecture) , meaning that the network node 110 may implement a full radio protocol stack that is physically and logically integrated within a single node (for example, a single physical structure) in the wireless communication network 100. For example, an aggregated network node 110 may consist of a single standalone base station or a single TRP that uses a full radio protocol stack to enable or facilitate communication between a UE 120 and a core network of the wireless communication network 100.
[0050] Alternatively, and as also shown, a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , meaning that the network node 110 may implement a radio protocol stack that is physically distributed and / or logically distributed among two or more nodes in the same geographic location or in different geographic locations. For example, a disaggregated network node may have a disaggregated architecture. In some deployments, disaggregated network nodes 110 may be used in an integrated access and backhaul (IAB) network, in an open radio access network (O-RAN) (such as a network configuration in compliance with the O-RAN Alliance) , or in a virtualized radio access network (vRAN) , also known as a cloud radio access network (C-RAN) , to facilitate scaling by separating base station functionality into multiple units that can be individually deployed.
[0051] The network nodes 110 of the wireless communication network 100 may include one or more central units (CUs) , one or more distributed units (DUs) , and / or one or more radio units (RUs) . A CU may host one or more higher layer control functions, such as radio resource control (RRC) functions, packet data convergence protocol (PDCP) functions, and / or service data adaptation protocol (SDAP) functions, among other examples. A DU may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and / or one or more higher physical (PHY) layers depending, at least in part, on a functional split, such as a functional split defined by the 3GPP. In some examples, a DU also may host one or more lower PHY layer functions, such as a fast Fourier transform (FFT) , an inverse FFT (iFFT) , beamforming, physical random access channel (PRACH) extraction and filtering, and / or scheduling of resources for one or more UEs 120, among other examples. An RU may host RF processing functions or lower PHY layer functions, such as an FFT, an iFFT, beamforming, or PRACH extraction and filtering, among other examples, according to a functional split, such as a lower layer functional split. In such an architecture, each RU can be operated to handle over the air (OTA) communication with one or more UEs 120.
[0052] In some aspects, a single network node 110 may include a combination of one or more CUs, one or more DUs, and / or one or more RUs. Additionally or alternatively, a network node 110 may include one or more Near-Real Time (Near-RT) RAN Intelligent Controllers (RICs) and / or one or more Non-Real Time (Non-RT) RICs. In some examples, a CU, a DU, and / or an RU may be implemented as a virtual unit, such as a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) , among other examples. A virtual unit may be implemented as a virtual network function, such as associated with a cloud deployment.
[0053] Some network nodes 110 (for example, a base station, an RU, or a TRP) may provide communication coverage for a particular geographic area. In the 3GPP, the term “cell” can refer to a coverage area of a network node 110 or to a network node 110 itself, depending on the context in which the term is used. A network node 110 may support one or multiple (for example, three) cells. In some examples, a network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs 120 with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscriptions. A femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs 120 having association with the femto cell (for example, UEs 120 in a closed subscriber group (CSG) ) . A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. A network node 110 for a femto cell may be referred to as a femto network node or an in-home network node. In some examples, a cell may not necessarily be stationary. For example, the geographic area of the cell may move according to the location of an associated mobile network node 110 (for example, a train, a satellite base station, an unmanned aerial vehicle, or an NTN network node) .
[0054] The wireless communication network 100 may be a heterogeneous network that includes network nodes 110 of different types, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, aggregated network nodes, and / or disaggregated network nodes, among other examples. In the example shown in Fig. 1, the network node 110a may be a macro network node for a macro cell 130a, the network node 110b may be a pico network node for a pico cell 130b, and the network node 110c may be a femto network node for a femto cell 130c. Various different types of network nodes 110 may generally transmit at different power levels, serve different coverage areas, and / or have different impacts on interference in the wireless communication network 100 than other types of network nodes 110. For example, macro network nodes may have a high transmit power level (for example, 5 to 40 watts) , whereas pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (for example, 0.1 to 2 watts) .
[0055] In some examples, a network node 110 may be, may include, or may operate as an RU, a TRP, or a base station that communicates with one or more UEs 120 via a radio access link (which may be referred to as a “Uu” link) . The radio access link may include a downlink and an uplink. “Downlink” (or “DL” ) refers to a communication direction from a network node 110 to a UE 120, and “uplink” (or “UL” ) refers to a communication direction from a UE 120 to a network node 110. Downlink channels may include one or more control channels and one or more data channels. A downlink control channel may be used to transmit downlink control information (DCI) (for example, scheduling information, reference signals, and / or configuration information) from a network node 110 to a UE 120. A downlink data channel may be used to transmit downlink data (for example, user data associated with a UE 120) from a network node 110 to a UE 120. Downlink control channels may include one or more physical downlink control channels (PDCCHs) , and downlink data channels may include one or more physical downlink shared channels (PDSCHs) . Uplink channels may similarly include one or more control channels and one or more data channels. An uplink control channel may be used to transmit uplink control information (UCI) (for example, reference signals and / or feedback corresponding to one or more downlink transmissions) from a UE 120 to a network node 110. An uplink data channel may be used to transmit uplink data (for example, user data associated with a UE 120) from a UE 120 to a network node 110. Uplink control channels may include one or more physical uplink control channels (PUCCHs) , and uplink data channels may include one or more physical uplink shared channels (PUSCHs) . The downlink and the uplink may each include a set of resources on which the network node 110 and the UE 120 may communicate.
[0056] Downlink and uplink resources may include time domain resources (frames, subframes, slots, and / or symbols) , frequency domain resources (frequency bands, component carriers, subcarriers, resource blocks, and / or resource elements) , and / or spatial domain resources (particular transmit directions and / or beam parameters) . Frequency domain resources of some bands may be subdivided into bandwidth parts (BWPs) . A BWP may be a continuous block of frequency domain resources (for example, a continuous block of resource blocks) that are allocated for one or more UEs 120. A UE 120 may be configured with both an uplink BWP and a downlink BWP (where the uplink BWP and the downlink BWP may be the same BWP or different BWPs) . A BWP may be dynamically configured (for example, by a network node 110 transmitting a DCI configuration to the one or more UEs 120) and / or reconfigured, which means that a BWP can be adjusted in real-time (or near-real-time) based on changing network conditions in the wireless communication network 100 and / or based on the specific requirements of the one or more UEs 120. This enables more efficient use of the available frequency domain resources in the wireless communication network 100 because fewer frequency domain resources may be allocated to a BWP for a UE 120 (which may reduce the quantity of frequency domain resources that a UE 120 is required to monitor) , leaving more frequency domain resources to be spread across multiple UEs 120. Thus, BWPs may also assist in the implementation of lower-capability UEs 120 by facilitating the configuration of smaller bandwidths for communication by such UEs 120.
[0057] As described above, in some aspects, the wireless communication network 100 may be, may include, or may be included in, an IAB network. In an IAB network, at least one network node 110 is an anchor network node that communicates with a core network. An anchor network node 110 may also be referred to as an IAB donor (or “IAB-donor” ) . The anchor network node 110 may connect to the core network via a wired backhaul link. For example, an Ng interface of the anchor network node 110 may terminate at the core network. Additionally or alternatively, an anchor network node 110 may connect to one or more devices of the core network that provide a core access and mobility management function (AMF) . An IAB network also generally includes multiple non-anchor network nodes 110, which may also be referred to as relay network nodes or simply as IAB nodes (or “IAB-nodes” ) . Each non-anchor network node 110 may communicate directly with the anchor network node 110 via a wireless backhaul link to access the core network, or may communicate indirectly with the anchor network node 110 via one or more other non-anchor network nodes 110 and associated wireless backhaul links that form a backhaul path to the core network. Some anchor network node 110 or other non-anchor network node 110 may also communicate directly with one or more UEs 120 via wireless access links that carry access traffic. In some examples, network resources for wireless communication (such as time resources, frequency resources, and / or spatial resources) may be shared between access links and backhaul links.
[0058] In some examples, any network node 110 that relays communications may be referred to as a relay network node, a relay station, or simply as a relay. A relay may receive a transmission of a communication from an upstream station (for example, another network node 110 or a UE 120) and transmit the communication to a downstream station (for example, a UE 120 or another network node 110) . In this case, the wireless communication network 100 may include or be referred to as a “multi-hop network. ” In the example shown in Fig. 1, the network node 110d (for example, a relay network node) may communicate with the network node 110a (for example, a macro network node) and the UE 120d in order to facilitate communication between the network node 110a and the UE 120d. Additionally or alternatively, a UE 120 may be or may operate as a relay station that can relay transmissions to or from other UEs 120. A UE 120 that relays communications may be referred to as a UE relay or a relay UE, among other examples.
[0059] The UEs 120 may be physically dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile. A UE 120 may be, may include, or may be included in an access terminal, another terminal, a mobile station, or a subscriber unit. A UE 120 may be, include, or be coupled with a cellular phone (for example, a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (for example, a smart watch, smart clothing, smart glasses, a smart wristband, and / or smart jewelry, such as a smart ring or a smart bracelet) , an entertainment device (for example, a music device, a video device, and / or a satellite radio) , an XR device, a vehicular component or sensor, a smart meter or sensor, industrial manufacturing equipment, a Global Navigation Satellite System (GNSS) device (such as a Global Positioning System device or another type of positioning device) , a UE function of a network node, and / or any other suitable device or function that may communicate via a wireless medium.
[0060] A UE 120 and / or a network node 110 may include one or more chips, system-on-chips (SoCs) , chipsets, packages, or devices that individually or collectively constitute or comprise a processing system. The processing system includes processor (or “processing” ) circuitry in the form of one or multiple processors, microprocessors, processing units (such as central processing units (CPUs) , graphics processing units (GPUs) , neural processing units (NPUs) and / or digital signal processors (DSPs) ) , processing blocks, application-specific integrated circuits (ASIC) , programmable logic devices (PLDs) (such as field programmable gate arrays (FPGAs) ) , or other discrete gate or transistor logic or circuitry (all of which may be generally referred to herein individually as “processors” or collectively as “the processor” or “the processor circuitry” ) . One or more of the processors may be individually or collectively configurable or configured to perform various functions or operations described herein. A group of processors collectively configurable or configured to perform a set of functions may include a first processor configurable or configured to perform a first function of the set and a second processor configurable or configured to perform a second function of the set, or may include the group of processors all being configured or configurable to perform the set of functions.
[0061] The processing system may further include memory circuitry in the form of one or more memory devices, memory blocks, memory elements or other discrete gate or transistor logic or circuitry, each of which may include tangible storage media such as random-access memory (RAM) or read-only memory (ROM) , or combinations thereof (all of which may be generally referred to herein individually as “memories” or collectively as “the memory” or “the memory circuitry” ) . One or more of the memories may be coupled (for example, operatively coupled, communicatively coupled, electronically coupled, or electrically coupled) with one or more of the processors and may individually or collectively store processor-executable code (such as software) that, when executed by one or more of the processors, may configure one or more of the processors to perform various functions or operations described herein. Additionally or alternatively, in some examples, one or more of the processors may be preconfigured to perform various functions or operations described herein without requiring configuration by software. The processing system may further include or be coupled with one or more modems (such as a Wi-Fi (for example, IEEE compliant) modem or a cellular (for example, 3GPP 4G LTE, 5G, or 6G compliant) modem) . In some implementations, one or more processors of the processing system include or implement one or more of the modems. The processing system may further include or be coupled with multiple radios (collectively “the radio” ) , multiple RF chains, or multiple transceivers, each of which may in turn be coupled with one or more of multiple antennas. In some implementations, one or more processors of the processing system include or implement one or more of the radios, RF chains or transceivers. The UE 120 may include or may be included in a housing that houses components associated with the UE 120 including the processing system.
[0062] Some UEs 120 may be considered machine-type communication (MTC) UEs, evolved or enhanced machine-type communication (eMTC) , UEs, further enhanced eMTC (feMTC) UEs, or enhanced feMTC (efeMTC) UEs, or further evolutions thereof, all of which may be simply referred to as “MTC UEs” ) . An MTC UE may be, may include, or may be included in or coupled with a robot, an uncrewed aerial vehicle, a remote device, a sensor, a meter, a monitor, and / or a location tag. Some UEs 120 may be considered IoT devices and / or may be implemented as NB-IoT (narrowband IoT) devices. An IoT UE or NB-IoT device may be, may include, or may be included in or coupled with an industrial machine, an appliance, a refrigerator, a doorbell camera device, a home automation device, and / or a light fixture, among other examples. Some UEs 120 may be considered Customer Premises Equipment, which may include telecommunications devices that are installed at a customer location (such as a home or office) to enable access to a service provider's network (such as included in or in communication with the wireless communication network 100) .
[0063] Some UEs 120 may be classified according to different categories in association with different complexities and / or different capabilities. UEs 120 in a first category may facilitate massive IoT in the wireless communication network 100, and may offer low complexity and / or cost relative to UEs 120 in a second category. UEs 120 in a second category may include mission-critical IoT devices, legacy UEs, baseline UEs, high-tier UEs, advanced UEs, full-capability UEs, and / or premium UEs that are capable of URLLC, enhanced mobile broadband (eMBB) , and / or precise positioning in the wireless communication network 100, among other examples. A third category of UEs 120 may have mid-tier complexity and / or capability (for example, a capability between UEs 120 of the first category and UEs 120 of the second capability) . A UE 120 of the third category may be referred to as a reduced capacity UE ( “RedCap UE” ) , a mid-tier UE, an NR-Light UE, and / or an NR-Lite UE, among other examples. RedCap UEs may bridge a gap between the capability and complexity of NB-IoT devices and / or eMTC UEs, and mission-critical IoT devices and / or premium UEs. RedCap UEs may include, for example, wearable devices, IoT devices, industrial sensors, and / or cameras that are associated with a limited bandwidth, power capacity, and / or transmission range, among other examples. RedCap UEs may support healthcare environments, building automation, electrical distribution, process automation, transport and logistics, and / or smart city deployments, among other examples.
[0064] In some examples, two or more UEs 120 (for example, shown as UE 120a and UE 120e) may communicate directly with one another using sidelink communications (for example, without communicating by way of a network node 110 as an intermediary) . As an example, the UE 120a may directly transmit data, control information, or other signaling as a sidelink communication to the UE 120e. This is in contrast to, for example, the UE 120a first transmitting data in an UL communication to a network node 110, which then transmits the data to the UE 120e in a DL communication. In various examples, the UEs 120 may transmit and receive sidelink communications using peer-to-peer (P2P) communication protocols, device-to-device (D2D) communication protocols, vehicle-to-everything (V2X) communication protocols (which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, and / or vehicle-to-pedestrian (V2P) protocols) , and / or mesh network communication protocols. In some deployments and configurations, a network node 110 may schedule and / or allocate resources for sidelink communications between UEs 120 in the wireless communication network 100. In some other deployments and configurations, a UE 120 (instead of a network node 110) may perform, or collaborate or negotiate with one or more other UEs to perform, scheduling operations, resource selection operations, and / or other operations for sidelink communications.
[0065] In various examples, some of the network nodes 110 and the UEs 120 of the wireless communication network 100 may be configured for full-duplex operation in addition to half-duplex operation. A network node 110 or a UE 120 operating in a half-duplex mode may perform only one of transmission or reception during particular time resources, such as during particular slots, symbols, or other time periods. Half-duplex operation may involve time-division duplexing (TDD) , in which DL transmissions of the network node 110 and UL transmissions of the UE 120 do not occur in the same time resources (that is, the transmissions do not overlap in time) . In contrast, a network node 110 or a UE 120 operating in a full-duplex mode can transmit and receive communications concurrently (for example, in the same time resources) . By operating in a full-duplex mode, network nodes 110 and / or UEs 120 may generally increase the capacity of the network and the radio access link. In some examples, full-duplex operation may involve frequency-division duplexing (FDD) , in which DL transmissions of the network node 110 are performed in a first frequency band or on a first component carrier and transmissions of the UE 120 are performed in a second frequency band or on a second component carrier different than the first frequency band or the first component carrier, respectively. In some examples, full-duplex operation may be enabled for a UE 120 but not for a network node 110. For example, a UE 120 may simultaneously transmit an UL transmission to a first network node 110 and receive a DL transmission from a second network node 110 in the same time resources. In some other examples, full-duplex operation may be enabled for a network node 110 but not for a UE 120. For example, a network node 110 may simultaneously transmit a DL transmission to a first UE 120 and receive an UL transmission from a second UE 120 in the same time resources. In some other examples, full-duplex operation may be enabled for both a network node 110 and a UE 120.
[0066] In some examples, the UEs 120 and the network nodes 110 may perform MIMO communication. “MIMO” generally refers to transmitting or receiving multiple signals (such as multiple layers or multiple data streams) simultaneously over the same time and frequency resources. MIMO techniques generally exploit multipath propagation. MIMO may be implemented using various spatial processing or spatial multiplexing operations. In some examples, MIMO may support simultaneous transmission to multiple receivers, referred to as multi-user MIMO (MU-MIMO) . Some RATs may employ advanced MIMO techniques, such as mTRP operation (including redundant transmission or reception on multiple TRPs) , reciprocity in the time domain or the frequency domain, single-frequency-network (SFN) transmission, or non-coherent joint transmission (NC-JT) .
[0067] In some aspects, the UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; receive a configuration of a cross-link interference (CLI) measurement on a first time resource of a CLI cell in a first band; and perform the CLI measurement in the first band, wherein scheduling on a second time resource of a time division duplexing (TDD) cell in a second band is restricted in association with the first time resource. In some aspects, as described in more detail elsewhere herein, the communication manager 140 may transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; receive a configuration of a CLI measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex TDD carrier aggregation cell associated with a carrier aggregation configuration of the UE; and perform the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the UE is in the first band or the second band. Additionally, or alternatively, the communication manager 140 may perform one or more other operations described herein.
[0068] In some aspects, the network node 110 may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may receive capability information indicating that a UE supports directional collision handling for half-duplex carrier aggregation within a cell group; and transmit a configuration of a CLI measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource. Additionally, or alternatively, the communication manager 150 may perform one or more other operations described herein.
[0069] As indicated above, Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
[0070] Fig. 2 is a diagram illustrating an example network node 110 in communication with an example UE 120 in a wireless network in accordance with the present disclosure.
[0071] As shown in Fig. 2, the network node 110 may include a data source 212, a transmit processor 214, a transmit (TX) MIMO processor 216, a set of modems 232 (shown as 232a through 232t, where t ≥ 1) , a set of antennas 234 (shown as 234a through 234v, where v ≥ 1) , a MIMO detector 236, a receive processor 238, a data sink 239, a controller / processor 240, a memory 242, a communication unit 244, a scheduler 246, and / or a communication manager 150, among other examples. In some configurations, one or a combination of the antenna (s) 234, the modem (s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 214, and / or the TX MIMO processor 216 may be included in a transceiver of the network node 110. The transceiver may be under control of and used by one or more processors, such as the controller / processor 240, and in some aspects in conjunction with processor-readable code stored in the memory 242, to perform aspects of the methods, processes, and / or operations described herein. In some aspects, the network node 110 may include one or more interfaces, communication components, and / or other components that facilitate communication with the UE 120 or another network node.
[0072] The terms “processor, ” “controller, ” or “controller / processor” may refer to one or more controllers and / or one or more processors. For example, reference to “a / the processor, ” “a / the controller / processor, ” or the like (in the singular) should be understood to refer to any one or more of the processors described in connection with Fig. 2, such as a single processor or a combination of multiple different processors. Reference to “one or more processors” should be understood to refer to any one or more of the processors described in connection with Fig. 2. For example, one or more processors of the network node 110 may include transmit processor 214, TX MIMO processor 216, MIMO detector 236, receive processor 238, and / or controller / processor 240. Similarly, one or more processors of the UE 120 may include MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, and / or controller / processor 280.
[0073] In some aspects, a single processor may perform all of the operations described as being performed by the one or more processors. In some aspects, a first set of (one or more) processors of the one or more processors may perform a first operation described as being performed by the one or more processors, and a second set of (one or more) processors of the one or more processors may perform a second operation described as being performed by the one or more processors. The first set of processors and the second set of processors may be the same set of processors or may be different sets of processors. Reference to “one or more memories” should be understood to refer to any one or more memories of a corresponding device, such as the memory described in connection with Fig. 2. For example, operation described as being performed by one or more memories can be performed by the same subset of the one or more memories or different subsets of the one or more memories.
[0074] For downlink communication from the network node 110 to the UE 120, the transmit processor 214 may receive data ( “downlink data” ) intended for the UE 120 (or a set of UEs that includes the UE 120) from the data source 212 (such as a data pipeline or a data queue) . In some examples, the transmit processor 214 may select one or more MCSs for the UE 120 in accordance with one or more channel quality indicators (CQIs) received from the UE 120. The network node 110 may process the data (for example, including encoding the data) for transmission to the UE 120 on a downlink in accordance with the MCS (s) selected for the UE 120 to generate data symbols. The transmit processor 214 may process system information (for example, semi-static resource partitioning information (SRPI) ) and / or control information (for example, CQI requests, grants, and / or upper layer signaling) and provide overhead symbols and / or control symbols. The transmit processor 214 may generate reference symbols for reference signals (for example, a cell-specific reference signal (CRS) , a demodulation reference signal (DMRS) , or a channel state information (CSI) reference signal (CSI-RS) ) and / or synchronization signals (for example, a primary synchronization signal (PSS) or a secondary synchronization signals (SSS) ) .
[0075] The TX MIMO processor 216 may perform spatial processing (for example, precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and may provide a set of output symbol streams (for example, T output symbol streams) to the set of modems 232. For example, each output symbol stream may be provided to a respective modulator component (shown as MOD) of a modem 232. Each modem 232 may use the respective modulator component to process (for example, to modulate) a respective output symbol stream (for example, for orthogonal frequency division multiplexing (OFDM) ) to obtain an output sample stream. Each modem 232 may further use the respective modulator component to process (for example, convert to analog, amplify, filter, and / or upconvert) the output sample stream to obtain a time domain downlink signal. The modems 232a through 232t may together transmit a set of downlink signals (for example, T downlink signals) via the corresponding set of antennas 234.
[0076] A downlink signal may include a DCI communication, a MAC control element (MAC-CE) communication, an RRC communication, a downlink reference signal, or another type of downlink communication. Downlink signals may be transmitted on a PDCCH, a PDSCH, and / or on another downlink channel. A downlink signal may carry one or more transport blocks (TBs) of data. A TB may be a unit of data that is transmitted over an air interface in the wireless communication network 100. A data stream (for example, from the data source 212) may be encoded into multiple TBs for transmission over the air interface. The quantity of TBs used to carry the data associated with a particular data stream may be associated with a TB size common to the multiple TBs. The TB size may be based on or otherwise associated with radio channel conditions of the air interface, the MCS used for encoding the data, the downlink resources allocated for transmitting the data, and / or another parameter. In general, the larger the TB size, the greater the amount of data that can be transmitted in a single transmission, which reduces signaling overhead. However, larger TB sizes may be more prone to transmission and / or reception errors than smaller TB sizes, but such errors may be mitigated by more robust error correction techniques.
[0077] For uplink communication from the UE 120 to the network node 110, uplink signals from the UE 120 may be received by an antenna 234, may be processed by a modem 232 (for example, a demodulator component, shown as DEMOD, of a modem 232) , may be detected by the MIMO detector 236 (for example, a receive (Rx) MIMO processor) if applicable, and / or may be further processed by the receive processor 238 to obtain decoded data and / or control information. The receive processor 238 may provide the decoded data to a data sink 239 (which may be a data pipeline, a data queue, and / or another type of data sink) and provide the decoded control information to a processor, such as the controller / processor 240.
[0078] The network node 110 may use the scheduler 246 to schedule one or more UEs 120 for downlink or uplink communications. In some aspects, the scheduler 246 may use DCI to dynamically schedule DL transmissions to the UE 120 and / or UL transmissions from the UE 120. In some examples, the scheduler 246 may allocate recurring time domain resources and / or frequency domain resources that the UE 120 may use to transmit and / or receive communications using an RRC configuration (for example, a semi-static configuration) , for example, to perform semi-persistent scheduling (SPS) or to configure a configured grant (CG) for the UE 120.
[0079] One or more of the transmit processor 214, the TX MIMO processor 216, the modem 232, the antenna 234, the MIMO detector 236, the receive processor 238, and / or the controller / processor 240 may be included in an RF chain of the network node 110. An RF chain may include one or more filters, mixers, oscillators, amplifiers, analog-to-digital converters (ADCs) , and / or other devices that convert between an analog signal (such as for transmission or reception via an air interface) and a digital signal (such as for processing by one or more processors of the network node 110) . In some aspects, the RF chain may be or may be included in a transceiver of the network node 110.
[0080] In some examples, the network node 110 may use the communication unit 244 to communicate with a core network and / or with other network nodes. The communication unit 244 may support wired and / or wireless communication protocols and / or connections, such as Ethernet, optical fiber, common public radio interface (CPRI) , and / or a wired or wireless backhaul, among other examples. The network node 110 may use the communication unit 244 to transmit and / or receive data associated with the UE 120 or to perform network control signaling, among other examples. The communication unit 244 may include a transceiver and / or an interface, such as a network interface.
[0081] The UE 120 may include a set of antennas 252 (shown as antennas 252a through 252r, where r ≥ 1) , a set of modems 254 (shown as modems 254a through 254u, where u ≥ 1) , a MIMO detector 256, a receive processor 258, a data sink 260, a data source 262, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, a memory 282, and / or a communication manager 140, among other examples. One or more of the components of the UE 120 may be included in a housing 284. In some aspects, one or a combination of the antenna (s) 252, the modem (s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, or the TX MIMO processor 266 may be included in a transceiver that is included in the UE 120. The transceiver may be under control of and used by one or more processors, such as the controller / processor 280, and in some aspects in conjunction with processor-readable code stored in the memory 282, to perform aspects of the methods, processes, or operations described herein. In some aspects, the UE 120 may include another interface, another communication component, and / or another component that facilitates communication with the network node 110 and / or another UE 120.
[0082] For downlink communication from the network node 110 to the UE 120, the set of antennas 252 may receive the downlink communications or signals from the network node 110 and may provide a set of received downlink signals (for example, R received signals) to the set of modems 254. For example, each received signal may be provided to a respective demodulator component (shown as DEMOD) of a modem 254. Each modem 254 may use the respective demodulator component to condition (for example, filter, amplify, downconvert, and / or digitize) a received signal to obtain input samples. Each modem 254 may use the respective demodulator component to further demodulate or process the input samples (for example, for OFDM) to obtain received symbols. The MIMO detector 256 may obtain received symbols from the set of modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols. The receive processor 258 may process (for example, decode) the detected symbols, may provide decoded data for the UE 120 to the data sink 260 (which may include a data pipeline, a data queue, and / or an application executed on the UE 120) , and may provide decoded control information and system information to the controller / processor 280.
[0083] For uplink communication from the UE 120 to the network node 110, the transmit processor 264 may receive and process data ( “uplink data” ) from a data source 262 (such as a data pipeline, a data queue, and / or an application executed on the UE 120) and control information from the controller / processor 280. The control information may include one or more parameters, feedback, one or more signal measurements, and / or other types of control information. In some aspects, the receive processor 258 and / or the controller / processor 280 may determine, for a received signal (such as received from the network node 110 or another UE) , one or more parameters relating to transmission of the uplink communication. The one or more parameters may include a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, a CQI parameter, or a transmit power control (TPC) parameter, among other examples. The control information may include an indication of the RSRP parameter, the RSSI parameter, the RSRQ parameter, the CQI parameter, the TPC parameter, and / or another parameter. The control information may facilitate parameter selection and / or scheduling for the UE 120 by the network node 110.
[0084] The transmit processor 264 may generate reference symbols for one or more reference signals, such as an uplink DMRS, an uplink sounding reference signal (SRS) , and / or another type of reference signal. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266, if applicable, and further processed by the set of modems 254 (for example, for DFT-s-OFDM or CP-OFDM) . The TX MIMO processor 266 may perform spatial processing (for example, precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and may provide a set of output symbol streams (for example, U output symbol streams) to the set of modems 254. For example, each output symbol stream may be provided to a respective modulator component (shown as MOD) of a modem 254. Each modem 254 may use the respective modulator component to process (for example, to modulate) a respective output symbol stream (for example, for OFDM) to obtain an output sample stream. Each modem 254 may further use the respective modulator component to process (for example, convert to analog, amplify, filter, and / or upconvert) the output sample stream to obtain an uplink signal.
[0085] The modems 254a through 254u may transmit a set of uplink signals (for example, R uplink signals or U uplink symbols) via the corresponding set of antennas 252. An uplink signal may include a UCI communication, a MAC-CE communication, an RRC communication, or another type of uplink communication. Uplink signals may be transmitted on a PUSCH, a PUCCH, and / or another type of uplink channel. An uplink signal may carry one or more TBs of data. Sidelink data and control transmissions (that is, transmissions directly between two or more UEs 120) may generally use similar techniques as were described for uplink data and control transmission, and may use sidelink-specific channels such as a physical sidelink shared channel (PSSCH) , a physical sidelink control channel (PSCCH) , and / or a physical sidelink feedback channel (PSFCH) .
[0086] One or more antennas of the set of antennas 252 or the set of antennas 234 may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, or an antenna array may include one or more antenna elements (within a single housing or multiple housings) , a set of coplanar antenna elements, a set of non-coplanar antenna elements, or one or more antenna elements coupled with one or more transmission or reception components, such as one or more components of Fig. 2. As used herein, “antenna” can refer to one or more antennas, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays. “Antenna panel” can refer to a group of antennas (such as antenna elements) arranged in an array or panel, which may facilitate beamforming by manipulating parameters of the group of antennas. “Antenna module” may refer to circuitry including one or more antennas, which may also include one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device.
[0087] In some examples, each of the antenna elements of an antenna 234 or an antenna 252 may include one or more sub-elements for radiating or receiving radio frequency signals. For example, a single antenna element may include a first sub-element cross-polarized with a second sub-element that can be used to independently transmit cross-polarized signals. The antenna elements may include patch antennas, dipole antennas, and / or other types of antennas arranged in a linear pattern, a two-dimensional pattern, or another pattern. A spacing between antenna elements may be such that signals with a desired wavelength transmitted separately by the antenna elements may interact or interfere constructively and destructively along various directions (such as to form a desired beam) . For example, given an expected range of wavelengths or frequencies, the spacing may provide a quarter wavelength, a half wavelength, or another fraction of a wavelength of spacing between neighboring antenna elements to allow for the desired constructive and destructive interference patterns of signals transmitted by the separate antenna elements within that expected range.
[0088] The amplitudes and / or phases of signals transmitted via antenna elements and / or sub-elements may be modulated and shifted relative to each other (such as by manipulating phase shift, phase offset, and / or amplitude) to generate one or more beams, which is referred to as beamforming. The term “beam” may refer to a directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction. “Beam” may also generally refer to a direction associated with such a directional signal transmission, a set of directional resources associated with the signal transmission (for example, an angle of arrival, a horizontal direction, and / or a vertical direction) , and / or a set of parameters that indicate one or more aspects of a directional signal, a direction associated with the signal, and / or a set of directional resources associated with the signal. In some implementations, antenna elements may be individually selected or deselected for directional transmission of a signal (or signals) by controlling amplitudes of one or more corresponding amplifiers and / or phases of the signal (s) to form one or more beams. The shape of a beam (such as the amplitude, width, and / or presence of side lobes) and / or the direction of a beam (such as an angle of the beam relative to a surface of an antenna array) can be dynamically controlled by modifying the phase shifts, phase offsets, and / or amplitudes of the multiple signals relative to each other.
[0089] Different UEs 120 or network nodes 110 may include different numbers of antenna elements. For example, a UE 120 may include a single antenna element, two antenna elements, four antenna elements, eight antenna elements, or a different number of antenna elements. As another example, a network node 110 may include eight antenna elements, 24 antenna elements, 64 antenna elements, 128 antenna elements, or a different number of antenna elements. Generally, a larger number of antenna elements may provide increased control over parameters for beam generation relative to a smaller number of antenna elements, whereas a smaller number of antenna elements may be less complex to implement and may use less power than a larger number of antenna elements. Multiple antenna elements may support multiple-layer transmission, in which a first layer of a communication (which may include a first data stream) and a second layer of a communication (which may include a second data stream) are transmitted using the same time and frequency resources with spatial multiplexing.
[0090] While blocks in Fig. 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.
[0091] Fig. 3 is a diagram illustrating an example disaggregated base station architecture 300 in accordance with the present disclosure. One or more components of the example disaggregated base station architecture 300 may be, may include, or may be included in one or more network nodes (such one or more network nodes 110) . The disaggregated base station architecture 300 may include a CU 310 that can communicate directly with a core network 320 via a backhaul link, or that can communicate indirectly with the core network 320 via one or more disaggregated control units, such as a Non-RT RIC 350 associated with a Service Management and Orchestration (SMO) Framework 360 and / or a Near-RT RIC 370 (for example, via an E2 link) . The CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as via F1 interfaces. Each of the DUs 330 may communicate with one or more RUs 340 via respective fronthaul links. Each of the RUs 340 may communicate with one or more UEs 120 via respective RF access links. In some deployments, a UE 120 may be simultaneously served by multiple RUs 340.
[0092] Each of the components of the disaggregated base station architecture 300, including the CUs 310, the DUs 330, the RUs 340, the Near-RT RICs 370, the Non-RT RICs 350, and the SMO Framework 360, may include one or more interfaces or may be coupled with one or more interfaces for receiving or transmitting signals, such as data or information, via a wired or wireless transmission medium.
[0093] In some aspects, the CU 310 may be logically split into one or more CU user plane (CU-UP) units and one or more CU control plane (CU-CP) units. A CU-UP unit may communicate bidirectionally with a CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration. The CU 310 may be deployed to communicate with one or more DUs 330, as necessary, for network control and signaling. Each DU 330 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 340. For example, a DU 330 may host various layers, such as an RLC layer, a MAC layer, or one or more PHY layers, such as one or more high PHY layers or one or more low PHY layers. Each layer (which also may be referred to as a module) may be implemented with an interface for communicating signals with other layers (and modules) hosted by the DU 330, or for communicating signals with the control functions hosted by the CU 310. Each RU 340 may implement lower layer functionality. In some aspects, real-time and non-real-time aspects of control and user plane communication with the RU (s) 340 may be controlled by the corresponding DU 330.
[0094] The SMO Framework 360 may support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 360 may support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operations and maintenance interface, such as an O1 interface. For virtualized network elements, the SMO Framework 360 may interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 390) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface, such as an O2 interface. A virtualized network element may include, but is not limited to, a CU 310, a DU 330, an RU 340, a non-RT RIC 350, and / or a Near-RT RIC 370. In some aspects, the SMO Framework 360 may communicate with a hardware aspect of a 4G RAN, a 5G NR RAN, and / or a 6G RAN, such as an open eNB (O-eNB) 380, via an O1 interface. Additionally or alternatively, the SMO Framework 360 may communicate directly with each of one or more RUs 340 via a respective O1 interface. In some deployments, this configuration can enable each DU 330 and the CU 310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0095] The Non-RT RIC 350 may include or may implement a logical function that enables non-real-time control and optimization of RAN elements and resources, AI / ML workflows including model training and updates, and / or policy-based guidance of applications and / or features in the Near-RT RIC 370. The Non-RT RIC 350 may be coupled to or may communicate with (such as via an A1 interface) the Near-RT RIC 370. The Near-RT RIC 370 may include or may implement a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions via an interface (such as via an E2 interface) connecting one or more CUs 310, one or more DUs 330, and / or an O-eNB with the Near-RT RIC 370.
[0096] In some aspects, to generate AI / ML models to be deployed in the Near-RT RIC 370, the Non-RT RIC 350 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 370 and may be received at the SMO Framework 360 or the Non-RT RIC 350 from non-network data sources or from network functions. In some examples, the Non-RT RIC 350 or the Near-RT RIC 370 may tune RAN behavior or performance. For example, the Non-RT RIC 350 may monitor long-term trends and patterns for performance and may employ AI / ML models to perform corrective actions via the SMO Framework 360 (such as reconfiguration via an O1 interface) or via creation of RAN management policies (such as A1 interface policies) .
[0097] As indicated above, Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
[0098] The network node 110, the controller / processor 240 of the network node 110, the UE 120, the controller / processor 280 of the UE 120, the CU 310, the DU 330, the RU 340, or any other component (s) of Figs. 1, 2, or 3 may implement one or more techniques or perform one or more operations associated with CLI measurement in HD TDD, as described in more detail elsewhere herein. For example, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, any other component (s) of Fig. 2, the CU 310, the DU 330, or the RU 340 may perform or direct operations of, for example, process 1100 of Fig. 11, process 1200 of Fig. 12, process 1300 of Fig. 13, or other processes as described herein (alone or in conjunction with one or more other processors) . The memory 242 may store data and program codes for the network node 110, the network node 110, the CU 310, the DU 330, or the RU 340. The memory 282 may store data and program codes for the UE 120. In some examples, the memory 242 or the memory 282 may include a non-transitory computer-readable medium storing a set of instructions (for example, code or program code) for wireless communication. The memory 242 may include one or more memories, such as a single memory or multiple different memories (of the same type or of different types) . The memory 282 may include one or more memories, such as a single memory or multiple different memories (of the same type or of different types) . For example, the set of instructions, when executed (for example, directly, or after compiling, converting, or interpreting) by one or more processors of the network node 110, the UE 120, the CU 310, the DU 330, or the RU 340, may cause the one or more processors to perform process 1100 of Fig. 11, process 1200 of Fig. 12, process 1300 of Fig. 13, or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and / or interpreting the instructions, among other examples.
[0099] In some aspects, a UE (e.g., the UE 120) includes means for transmitting capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; means for receiving a configuration of a CLI measurement on a first time resource of a CLI cell in a first band; and / or means for performing the CLI measurement in the first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource. The means for the UE to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.
[0100] In some aspects, a UE (e.g., the UE 120) includes means for transmitting capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; means for receiving a configuration of a CLI measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex TDD carrier aggregation cell associated with a carrier aggregation configuration of the UE; and / or means for performing the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the UE is in the first band or the second band. The means for the UE to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.
[0101] In some aspects, a network node (e.g., the network node 110) includes means for receiving capability information indicating that a UE supports directional collision handling for half-duplex carrier aggregation within a cell group; and / or means for transmitting a configuration of a CLI measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource. The means for the network node to perform operations described herein may include, for example, one or more of communication manager 150, transmit processor 214, TX MIMO processor 216, modem 232, antenna 234, MIMO detector 236, receive processor 238, controller / processor 240, memory 242, or scheduler 246.
[0102] As indicated above, Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
[0103] Fig. 4 is a diagram illustrating an example 400 of a slot format used to schedule UE communications, in accordance with the present disclosure. As described above, a transmission timeline may be organized into radio frames, subframes, slots, and symbols. However, for ease of description, only the slot and symbol granularity are depicted in Fig. 4. Example 400 shows how time division duplexed (TDD) slots (e.g., slots on a TDD carrier) can be configured as usable for uplink and / or downlink communication using a combination of semi-static and dynamic signaling.
[0104] A timeline of slots is shown by reference number 410, which includes a number of slots 415a–415s. Each slot 415 and / or portions thereof (e.g., symbols) may be scheduled and / or configured for use for an uplink ( “UL” ) communication, a downlink ( “DL” ) communication, or as flexible ( “F” ) . A flexible slot (e.g., 415h–415m) may be used for either an uplink communication or a downlink communication. A resource configured and / or scheduled for use for an uplink communication is described herein as having an uplink (U) format. A resource configured and / or scheduled for use for a downlink communication is described herein as having a downlink (D) format. A resource configured and / or scheduled to include only flexible resources is described herein as having a flexible (F) format. All symbols within each slot may all be assigned alike (e.g., all “UL, ” all “DL, ” or all “F” ) , or else the slot may include multiple symbol assignment types. For example, in Fig. 4, slots 415a–415f (denoted by “nrofDownlinkSlots” ) are depicted as downlink slots without showing the symbol granularity because all symbols in each of those slots are configured as downlink symbols. Similarly, slots 415o–415s (denoted by “nrofUplinkSlots” ) are depicted as uplink slots without showing the symbol granularity because all symbols in each of those slots are configured as uplink symbols. In this regard, “nrofDownlinkSlots” refers to the number of consecutive full DL slots (e.g., slots including only DL symbols) at the beginning of each timeline of slots 410 (e.g., slots 415a–415f) , and “nrofUplinkSlots” refers to the number of consecutive full UL slots (e.g., slots including only UL symbols) at the end of each timeline of slots 410 (e.g., slots 415o–415s) .
[0105] Slots 415g and 415n include more than one format of symbols. More particularly, slot 415g includes six downlink symbols (denoted by “nrofDownlinkSymbols” ) , with the remaining eight symbols being flexible and thus available for uplink or downlink, for a total of fourteen symbols. Slot 415n includes six uplink symbols (denoted by “nrofUplinkSymbols” ) , with the remaining eight symbols being flexible and thus available for uplink or downlink, again for a total of fourteen symbols. In this regard, “nrofDownlinkSymbols” refers to the number of consecutive DL symbols in the beginning of the slot 415g following the last full DL slot 415f, and “nrofUplinkSymbols” refers to the number of consecutive UL symbols in the end of the slot 415n preceding the first full UL slot 415o. The remaining slots in the timeline of slots 410 (e.g., slots 415h–415m) are flexible (e.g., full flexible, with all symbols in these slots being configured as flexible symbols) , and thus available for uplink and downlink communication.
[0106] Resources (e.g., slots and / or symbols) semi-statically configured as flexible may be later reconfigured for use for uplink or downlink communication. In some aspects, a common configuration parameter (e.g., tdd-UL-DL-ConfigurationCommon or similar) transmitted to all UEs in a cell defines a semi-static slot and / or symbol structure, including designating certain slots or symbols for use in uplink communication, downlink communication, or as flexible for use in either uplink or downlink communication. For example, the common configuration parameter may semi-statically configure slots and symbols to have an initial configuration as shown in Fig. 4. A dedicated configuration parameter (e.g., tdd-UL-DL-ConfigurationDedicated) and a slot format indicator (SFI) , which can be transmitted to a specific UE, may then be used to reconfigure the flexible slots and symbols as uplink or downlink slots and symbols. In some cases, for a remaining flexible slot or symbol (e.g., slots or symbols still configured as flexible after the reconfiguration due to the dedicated configuration parameter) , the UE may monitor for physical downlink control channel (PDCCH) information, and determine whether a flexible slot or symbol should be configured as an uplink slot or symbol or a downlink slot or symbol based at least in part on an uplink and / or downlink resource allocation indicated by the PDCCH information. In some cases, the flexible slots or symbols may be dynamically changed by the network node via a DCI message or a similar message (which may be referred to as a UE-dedicated configuration) .
[0107] As indicated above, Fig. 4 is provided as an example. Other examples may differ from what is described with regard to Fig. 4.
[0108] Fig. 5 is a diagram illustrating an example 500 relating to UE-to-UE cross-link interference (CLI) , in accordance with the present disclosure.
[0109] “CLI” may refer to UE-to-UE interference between UEs in which an aggressor UE transmits signals to a serving cell network node within a same resource (e.g., time and frequency resource) as a victim UE’s reception. CLI may occur in a TDD band when conflicting transmission and reception directions are configured between the two UEs. For example, the CLI measurement may correspond to an SRS transmission from the aggressor UE or another form of transmission.
[0110] Example 500 shows an example of dynamic TDD communication. As shown in example 500, in some cases, such as when dynamic TDD is implemented, neighboring cells (cell 1 and cell 2) may use different TDD configurations to communicate with UEs, which may result in an uplink communication between a first UE (UE1) and a first network node (network node 1) in a same transmission time interval (TTI) as a downlink communication between a second network node (network node 2) and a second UE (UE2) . These communications in different transmission directions (for example, downlink versus uplink) in the same TTI may interfere with one another, which may be referred to as CLI. Interference with reception of a downlink communication by one UE caused by transmission of an uplink communication by another UE may be referred to as UE-to-UE CLI or inter-UE CLI.
[0111] For example, as shown by reference number 502, in the dynamic TDD scenario, transmission of the uplink communication in a symbol or a slot by UE1 in cell 1 may interfere with reception of the downlink communication in the symbol or the slot by UE2 in cell 2. Such interference may be referred to as inter-cell UE-to-UE CLI or inter-cell inter-UE CLI.
[0112] CLI can also occur within a single cell (whether or not the single cell is configured for dynamic TDD) . For example, as shown by reference number 504, transmission of an uplink communication in a symbol or slot by UE3 in cell 2 may interfere with reception of a downlink communication in the symbol or the slot by UE2 in cell 2. This may also be referred to as intra-cell UE-to-UE CLI or intra-cell inter-UE CLI.
[0113] It may be beneficial to measure CLI, such as to facilitate reconfiguration of the network or the UEs to mitigate or eliminate the CLI. For example, for CLI associated with an aggressor UE’s SRS transmission, a CLI SRS measurement resource may be configured for the victim UE. For other forms of uplink transmission that may cause CLI to the victim UE, a CLI received signal strength indication (RSSI) measurement resource may be configured for the victim UE. CLI measurement procedures may be managed by the UE’s upper layer (i.e., Layer 3, RRC layer) as a periodic measurement, which may capture medium-to long-term averaged strength of the CLI.
[0114] When a signal causing CLI arrives at a victim UE, the signal’s timing may differ from the victim UE’s downlink or uplink timing. This timing difference may mean that a CLI measurement is likely to overlap other communications of the victim UE. Rules (such as restrictions) may be provided to restrict the victim UE from communicating with a serving cell network node when the communication would collide with a configured CLI measurement. Examples of such rules, for a victim UE in FR1, are provided below:
[0115] Example Rule 1: A UE is not expected to transmit a PUCCH, PUSCH, or SRS on OFDM symbols on which the UE performs CLI measurements, and on 1 (one) data symbol before an OFDM symbol used for CLI measurements for 15 kHz and 30 kHz subcarrier spacings.
[0116] Example Rule 2: For a UE which does not support cli-SRS-RSRP-FDM_DL (defined by a 3GPP wireless communication specification) , the UE is not expected to receive a PDCCH, a PDSCH, a CSI-RS for tracking, or a CSI-RS for channel quality information (CQI) on OFDM symbols on which the UE performs SRS-RSRP measurements, and on 1 data symbol before an OFDM symbol used for SRS-RSRP measurements for 15 kHz and 30 kHz subcarrier spacings.
[0117] Example Rule 3: For a UE which does not support cli-RSSI-FDM-DL (defined by a 3GPP wireless communication specification) , the UE is not expected to receive a PDCCH, a PDSCH, a CSI-RS for tracking, or a CSI-RS for CQI on OFDM symbols on which the UE performs CLI-RSSI measurements, and on 1 data symbol before an OFDM symbol used for CLI-RSSI measurements for 15 kHz and 30 kHz subcarrier spacings.
[0118] Example Rule 4: A UE is not expected to transmit a PUCCH, a PUSCH, or an SRS on OFDM symbols on which the UE performs CLI measurement, and on 2 data symbols before an OFDM symbol used for CLI measurements for a 60 kHz subcarrier spacing.
[0119] Example Rule 5: For a UE which does not support cli-SRS-RSRP-FDM_DL, the UE is not expected to receive a PDCCH, a PDSCH, a CSI-RS for tracking, or a CSI-RS for CQI on OFDM symbols on which the UE performs SRS-RSRP measurement, and on 2 data symbols before an OFDM symbol used for SRS-RSRP measurements for a 60 kHz subcarrier spacing.
[0120] Example Rule 6: For a UE which does not support cli-RSSI-FDM-DL, the UE is not expected to receive a PDCCH, a PDSCH, a CSI-RS for tracking, or a CSI-RS for CQI on OFDM symbols on which the UE performs CLI-RSSI measurement, and on 2 data symbols before an OFDM symbol used for CLI-RSSI measurements for a 60 kHz subcarrier spacing.
[0121] More examples of such rules, for a victim UE in FR2, are provided below:
[0122] Example Rule 7: A UE is not expected to transmit a PUCCH, PUSCH, or SRS on OFDM symbols on which the UE performs CLI measurements, and on 1 data symbol before an OFDM symbol used for CLI measurements for a 60 kHz subcarrier spacing.
[0123] Example Rule 8: For a UE which does not support cli-SRS-RSRP-FDM_DL (defined by a 3GPP wireless communication specification) , the UE is not expected to receive a PDCCH, a PDSCH, a CSI-RS for tracking, or a CSI-RS for channel quality information (CQI) on OFDM symbols on which the UE performs SRS-RSRP measurements, and on 1 data symbol before an OFDM symbol used for SRS-RSRP measurements for a 60 kHz subcarrier spacing.
[0124] Example Rule 9: For a UE which does not support cli-RSSI-FDM-DL (defined by a 3GPP wireless communication specification) , the UE is not expected to receive a PDCCH, a PDSCH, a CSI-RS for tracking, or a CSI-RS for CQI on OFDM symbols on which the UE performs CLI-RSSI measurements, and on 1 data symbol before an OFDM symbol used for CLI-RSSI measurements for a 60 kHz subcarrier spacing.
[0125] Example Rule 10: A UE is not expected to transmit a PUCCH, a PUSCH, or an SRS on OFDM symbols on which the UE performs CLI measurement, and on 2 data symbols before an OFDM symbol used for CLI measurements for a 120 kHz subcarrier spacing.
[0126] Example Rule 11: For a UE which does not support cli-SRS-RSRP-FDM_DL, the UE is not expected to receive a PDCCH, a PDSCH, a CSI-RS for tracking, or a CSI-RS for CQI on OFDM symbols on which the UE performs SRS-RSRP measurement, and on 2 data symbols before an OFDM symbol used for SRS-RSRP measurements for a 120 kHz subcarrier spacing.
[0127] Example Rule 12: For a UE which does not support cli-RSSI-FDM-DL, the UE is not expected to receive a PDCCH, a PDSCH, a CSI-RS for tracking, or a CSI-RS for CQI on OFDM symbols on which the UE performs CLI-RSSI measurement, and on 2 data symbols before an OFDM symbol used for CLI-RSSI measurements for a 120 kHz subcarrier spacing.
[0128] This set of example rules may be used to resolve potential collisions in directions of communications on cells for which directional collision handling is enabled.
[0129] In some examples, TDD intra-band carrier aggregation (CA) may be configured. A TDD intra-band CA configuration may configure multiple serving cells within a single band for a given UE. A UE may be half-duplex-capable or full-duplex-capable across serving cells in CA. For a half-duplex-capable UE, TDD configurations of the multiple serving cells may be configured to avoid conflict between uplink and downlink communications of the UE in different serving cells (such as with the assistance of a reference cell, described in connection with Fig. 6) . The restrictions above may apply for TDD intra-band CA cells. For example, when TDD intra-band carrier aggregation is configured, the scheduling restrictions on a serving cell where CLI measurements are performed (as provided in Example Rules 1-12) may apply on all serving cells in the same band on symbols that fully or partially overlap with restricted symbols.
[0130] Thus, when a UE is configured to perform CLI measurement in a set of OFDM symbols, the UE may not perform uplink and downlink communication with serving cells in the set of OFDM symbols. For victim UE downlink communication with a serving cell, a UE capability (such as cli-SRS-RSRP-FDM_DL or cli-RSSI-FDM-DL) may indicate whether the victim UE can simultaneously measure CLI and perform downlink communication in different frequency resources with the serving cell. As described herein, the UE may not support this capability. For example, the UE may be a complexity-restricted UE and thus may not support simultaneous CLI measurement and downlink communication. Similarly, for victim UE uplink communication with a serving cell, the UE may not support (e.g., simultaneous) measurement of CLI and transmission of uplink signals to a serving cell in a TDD band. Furthermore, as described above, to accommodate a maximum timing misalignment between CLI measurement, and serving cell communication timing, additional symbols (such as 1 or 2 data symbols) are restricted for communication with a serving cell. Generally, as described above, the higher the subcarrier spacing for serving cell communication, the shorter the OFDM symbol duration, and the more additional symbols are impacted given the maximum range of the timing of CLI measurement. For example, given the subcarrier spacing (SCS) for serving cell communication (e.g., 60 kHz) , more additional OFDM symbols are impacted by CLI measurement in FR1 than in FR2 because FR1 has a larger cell size and the maximum timing misalignment is larger in FR1 than in FR2. The above scheduling restrictions (described as Example Rules) apply to both single cell and intra-band multiple serving cells. For example, if CLI measurement is configured on any cell of the frequency band, the UE may not perform communication with its serving cell network node in any cell in a symbol that collides with the CLI measurement in another cell in the same frequency band.
[0131] As indicated above, Fig. 5 is provided as an example. Other examples may differ from what is described with regard to Fig. 5.
[0132] Fig. 6 is a diagram illustrating examples 600 and 605 of timing differences between cells for CLI measurement, in accordance with the present disclosure. The operations of examples 600 and 605 may be performed by a victim UE (e.g., UE 120) . CLI measurement resources 610 are configured in example 600 and CLI measurement resources 615 are configured in example 605. Symbols for uplink or downlink communications on one or more serving cells (illustrated as Cell 1 and Cell 2) are illustrated by reference numbers 620, 625, and 630. A CLI measurement resource may also be referred to as a CLI measurement occasion.
[0133] As shown, the CLI measurements are offset in time from a timing of the one or more serving cells of the victim UE. This is because signals that cause CLI (which is the subject of the CLI measurement) are received from a cell or network node that is physically separated from the one or more serving cells and are thus subject to a different propagation delay than signals to or from the one or more serving cells. Note that OFDM symbol index N does not correspond to the same physical time duration for CLI measurement resources 610 / 615 and for the victim UE’s uplink or downlink communications. Due to the victim UE’s uplink and downlink timing difference, the same symbol index may not correspond to the same physical time duration for the victim UE’s UL communication and DL communication. In this example, the extra symbol N in the victim UE’s uplink or downlink communication is impacted by a timing difference between the serving cell’s downlink or uplink communication and the CLI measurement resources 610 / 615. CLI measurement may be configured on a cell (such as a serving cell) of the UE. A cell on which CLI measurement is configured may be referred to herein as a CLI cell.
[0134] Example 600 is an example where CLI measurement is configured for a UE that is configured with a single TDD cell 620. In some examples, when CLI measurement is configured for a UE that is configured with a single TDD cell, the UE always semi-statically performs CLI measurement in the higher-layer configured CLI measurement resource 610 given that CLI measurement has a higher priority than serving cell communication. This means that, from the timing perspective of serving cell communication (on TDD cell 620) , in the restricted symbols that overlap with the CLI measurement (e.g., symbols N, N+1 and N+2 in the figure, shown by reference number 635) , the UE may know ahead of time that the UE will only use a receiver to measure CLI (and not to communicate on the TDD cell 620) . In other words, operation of the UE will be in the “receive” direction in those symbols.
[0135] Example 605 is an example where CLI measurement is configured for a cell of a group of intra-band TDD cells, which may belong to a carrier aggregation configuration. In some examples, when CLI measurement is configured for a group of intra-band TDD cells (such as intra-band TDD cells 625 and 630 of example 605) , on each intra-band TDD cell, within symbols that overlap with the restricted symbols on the cell where CLI measurement is configured, the UE is only expected to receive CLI measurement signals. This creates an intra-band half duplex (HD) condition for the intra-band carrier aggregation of multiple TDD cells. Suppose that in the figure example, CLI measurement is configured in TDD cell 625 in symbols N+1 and N+2. From the serving cell’s timing perspective, symbols N, N+1 and N+2 (shown by reference number 640) are restricted symbols in both cell 1 and cell 2. Thus, serving cell communication is not allowed in any symbols that may collide with the CLI measurement resource 615. As a result, the CLI measurement creates an HD operation for intra-band TDD carrier aggregation within the duration of the CLI measurement resource 615 (during which the UE can only receive for the purpose of performing CLI measurement) .
[0136] Fig. 7 is a diagram illustrating examples 700 of carrier aggregation, in accordance with the present disclosure.
[0137] Carrier aggregation is a technology that enables two or more component carriers (CCs, sometimes referred to as carriers or cells) to be combined (e.g., into a single channel) for a single UE 120 to enhance data capacity. When CA is configured, there are multiple serving cells, each within a component carrier. As shown, carriers can be combined in the same or different frequency bands. Additionally, or alternatively, contiguous or non-contiguous carriers can be combined. A network node 110 may configure carrier aggregation for a UE 120, such as in a radio resource control (RRC) message, downlink control information (DCI) , and / or another signaling message.
[0138] As shown by reference number 705, in some aspects, carrier aggregation may be configured in an intra-band contiguous mode where the aggregated carriers are contiguous to one another and are in the same band. As shown by reference number 710, in some aspects, carrier aggregation may be configured in an intra-band non-contiguous mode where the aggregated carriers are non-contiguous to one another and are in the same band. As shown by reference number 715, in some aspects, carrier aggregation may be configured in an inter-band non-contiguous mode where the aggregated carriers are non-contiguous to one another and are in different bands.
[0139] In carrier aggregation, a UE 120 may be configured with a primary carrier or primary cell (PCell) and one or more secondary carriers or secondary cells (SCells) . In some aspects, the primary carrier may carry control information (e.g., downlink control information and / or scheduling information) for scheduling data communications on one or more secondary carriers, which may be referred to as cross-carrier scheduling. In some aspects, a carrier (e.g., a primary carrier or a secondary carrier) may carry control information for scheduling data communications on the carrier, which may be referred to as self-carrier scheduling or carrier self-scheduling.
[0140] As indicated above, Fig. 7 is provided as an example. Other examples may differ from what is described with regard to Fig. 7.
[0141] Fig. 8 is a diagram illustrating examples 800 and 810 of reference cells for HD CA. “HD CA” may refer to carrier aggregation in which a UE communicates in a single direction, at a given time, across all cells of a carrier aggregation configuration.
[0142] A UE may transmit capability signaling to indicate capabilities supported by the UE for certain features. Some UE capabilities are related to UE full duplex (FD) and HD operations across cells. For example, a frequency band level capability may indicate whether the UE supports simultaneous transmission and reception in different frequency bands, and a cell level capability may indicate whether the UE supports directional conflict handling to avoid simultaneous transmission and reception in cells in TDD CA. In some aspects described herein, the UE supports HD in TDD CA, and may or may not support a frequency band level capability for simultaneous transmission and reception in different frequency bands. “Frequency band, ” as described herein, may refer to a frequency band as defined in a 3GPP technical specification (e.g., 3GPP Technical Specification (TS) 38.101) .
[0143] When the UE can be or is configured with CA over multiple frequency bands (such as band i and band j of Fig. 8) , the UE can report whether the UE supports a parameter “simultaneousRxTxInterBandCA. ” For example, this parameter may be defined by a radio frequency (RF) UE capability feature group (FG) 2-5. If the UE supports FG 2-5 (that is, if the UE support simultaneous transmission and reception in different frequency bands) , within the reported band combinations the UE can perform simultaneous reception and transmission in different inter-band cases including both TDD-TDD (where two or more bands each include a TDD carrier) and TDD-FDD cases (where one band includes a TDD carrier and another band includes an FDD carrier) . If the UE does not support FG 2-5 for a band combination (that is, if the UE does not support simultaneous transmission and reception in this band combination) , the UE is not required to perform simultaneous reception and transmission over frequency bands of the band combination. In other words, if the UE does not support FG 2-5, the UE only supports half duplex (only transmission or reception at a given time) over the different bands. Otherwise, the UE can support full duplex (i.e., simultaneous transmission and reception) in different frequency bands.
[0144] At least for cells in TDD CA that have the same subcarrier spacing, restricting the UE operation only in a transmission or reception direction (by not supporting FG 2-5) can effectively reduce UE cost by sharing RF and baseband modules between transmitter and receiver, and reduce the inter-cell interference. This restriction can also be enforced by careful network implementation and configuration (for example, when the UE is configured to transmit in one cell, it may be possible to configure communications such that the UE is never configured to receive in any other cell at that time) . However, this significantly impacts network scheduling flexibility and efficiency. Thus, it may be beneficial to define rules to resolve the conflict between transmission and reception that could occur on different cells.
[0145] A UE may report a capability indicating whether the UE supports directional collision handling for HD CA within a cell group (such as a master cell group (MCG) or a secondary cell group (SCG) ) . For example, a layer-1 (L1) UE capability referred to as FG 14-5 (including half-DuplexTDD-CA-SameSCS-r16) may be used to report whether the UE supports handling directional collision for half-duplex CA of TDD cells that have the same SCS in the same frequency range (i.e., FR1 or FR2) and same cell group (such as an MCG or SCG) . This capability (FG 14-5) may not be applicable if the UE is configured to monitor a DCI format (e.g., DCI format 2_0) for dynamically adjusting slot formats. After the UE applies the specified rules, the network node 110 is expected to not configure or schedule communications with the UE involving directional collision. Based on the UE’s capability report, the network node 110 indicates (in an RRC configuration) which TDD cells are included in the HD TDD CA operation.
[0146] If the UE does not support RF FG 2-5 for simultaneousRxTxInterBandCA, and supports L1 FG 14-5 (indicating support for directional collision handling) , the UE is not required to handle simultaneous transmission and reception across TDD cells (that is, those cells configured by the network node 110 for HD TDD CA) over different frequency bands. If the UE supports both RF FG 2-5 for simultaneousRxTxInterBandCA and L1 FG 14-5 for directional collision handling, the UE is not required to handle simultaneous transmission and reception for TDD cells within the same frequency band. A cell is configured for half duplex TDD CA operation if the network node 110 configures directionalCollisionHandling = ‘enabled’ in RRC signaling for this cell and the cell is associated with a TDD configuration (described elsewhere herein) .
[0147] A network node 110 may configure different TDD UL / DL slot formats (by tdd-UL-DL-ConfigurationCommon or by tdd-UL-DL-ConfigurationDedicated) or different higher layer configured UL reception or DL transmission for cells involved in half-duplex TDD CA operation. To ensure that the UE 120 is only required to operate in one direction at a time over these cells, a reference cell is determined, which the UE can use to determine the reference direction within each symbol where a directional collisional may occur. For HD TDD CA, a reference cell may be defined to identify a reference direction and every other cell of a carrier aggregation configuration may be aligned with the reference direction. In some aspects, the reference cell may be an active cell with a smallest cell index among configured serving cells if the UE is not capable of simultaneous transmission and reception across bands (for example, if simultaneousRxTxInterBandCA is not supported) . As shown in example 800, reference cell 805 may be an active cell with a smallest cell index among configured serving cells (cell 0) if the UE is not capable of simultaneous transmission and reception across band i and band j. Alternatively, the reference cell may be an active cell with a smallest cell index among the cells of each band, respectively, if the UE is capable of simultaneous transmission and reception across bands (for example, if simultaneousRxTxInterBandCA is supported) . As shown in example 810, reference cell 815 and reference cell 820 may be the active cells with the smallest cell index among the cells of each band i (cell 0) and band j (cell 3) if the UE is capable of simultaneous transmission and reception across the bands.
[0148] As indicated above, Fig. 8 is provided as an example. Other examples may differ from what is described with regard to Fig. 8.
[0149] A CLI measurement may be a higher-layer configured periodic measurement. In some examples, a CLI measurement may have higher priority than other higher-layer configured uplink or downlink communications with the serving cell, and higher priority than dynamically scheduled communications. For the other higher-layer configured communications, if an uplink transmission or a downlink reception would collide with the CLI measurements in at least one symbol, the UE may drop the higher layer configured uplink transmission or downlink reception (that is, the UE may not perform the configured communication) . In some aspects, it may be considered an error case if the network node 110 uses DCI to dynamically schedule an uplink transmission or a downlink reception that would collide with CLI measurements in at least one symbol. In some examples, the collision also includes extra symbols to account for the timing difference between CLI measurement and serving cell uplink or downlink communication. These restrictions apply to both single TDD cells and multiple TDD cells in the same band.
[0150] If the UE performs CLI measurements on a serving cell in a given band, the UE does not perform uplink or downlink communication with the serving cell at the same time. This creates an intra-band HD CA scenario for TDD cells. Because of this, if the UE supports simultaneous transmission and reception in different frequency bands (simultaneousRxTxInterBandCA) and directional collision handling (half-DuplexTDD-CA-SameSCS-r16) (that is, if HD TDD CA is only considered within a band and not across different frequency bands) , behavior across frequency bands is well-defined in situations where CLI measurements are configured on a given frequency band. However, if the UE supports directional collision handling (half-DuplexTDD-CA-SameSCS-r16) but not simultaneous transmission and reception in different frequency bands (simultaneousRxTxInterBandCA) , UE behavior when CLI measurement is configured is not well defined across multiple bands. This failure to define behavior may lead to dropped communications or failure of CLI measurement, leading to failure to address interference and reduced throughput. Figs. 9 and 10 provide examples of rules for resolving this ambiguity, thereby enabling improved communication and CLI measurement, leading to reduced interference and increased throughput.
[0151] Fig. 9 is a diagram illustrating an example 900 of CLI measurement in HD CA, in accordance with the present disclosure. As shown, example 900 includes a UE (e.g., UE 120) and a network node (e.g., network node 110) .
[0152] As shown by reference number 905, the UE 120 may transmit, and the network node 110 may receive, capability information. The capability information may indicate one or more capabilities supported by the UE 120. For example, the capability information may indicate that the UE 120 supports directional collision handling for HD CA within a cell group (e.g., the capability information may include half-DuplexTDD-CA-SameSCS-r16) . In some aspects, the capability information may indicate that the UE 120 does not support simultaneous transmission in a first band and reception in a second band. For example, the capability information may omit a parameter simultaneousRxTxInterBandCA. As another example, the parameter simultaneousRxTxInterBandCA may not indicate a band combination of a CA configuration of the UE. Thus, the UE may support directional collision handling and not simultaneous transmission in a first band and reception in a second band (e.g., the UE 120 may support half-DuplexTDD-CA-SameSCS-r16 but not simultaneousRxTxInterBandCA) .
[0153] As shown by reference number 910, the network node 110 may transmit, and the UE 120 may receive, configuration information. In some aspects, the configuration information may include a carrier aggregation configuration. For example, the configuration information may configure two or more serving cells for carrier aggregation. The configuration information may configure a plurality of cells as serving cells. The plurality of cells may include a first cell (e.g., a CLI cell) on a first band and a second cell (e.g., a TDD cell) on a second band, as described below. Thus, TDD inter-band CA is configured.
[0154] In some aspects, the configuration information may configure a set of cells, of the plurality of cells, to have directional collision handling enabled. For example, the UE may provide the capability information indicating that the UE supports directional collision handling for HD CA within a cell group, and the network node 110 may configure the set of cells to have directional collision handling enabled in accordance with the capability information.
[0155] In some aspects, a cell of the plurality of cells may be configured as an HD TDD CA cell. An HD TDD CA cell may include a cell that is configured to have directional collision handling enabled. For example, a cell may be an HD TDD CA cell if the cell is configured with directional collision handling enabled for a UE 120 that indicates support for directional collision handling (via the half-DuplexTDD-CA-SameSCS-r16 capability) and that is not configured to monitor a physical downlink control channel (PDCCH) for detection of a DCI format (e.g., DCI format 2_0) for dynamically adjusting slot formats on any of multiple serving cells configured for the UE 120.
[0156] The configuration information may include a configuration of a CLI measurement on a first time resource of a CLI cell. For example, the CLI cell may be one of the multiple cells configured by the configuration information. The configuration of the CLI measurement may be received separately from, or with, a configuration of the CLI cell (e.g., a serving cell configuration of the CLI cell, a carrier aggregation configuration) . The CLI cell may be in a first band. For example, the first band (in combination with a second band described below) may belong to a band combination for which the UE does not indicate support of simultaneous transmission and reception across bands (e.g., transmission in the first band and reception in the second band, or transmission in the second band and reception in the first band) .
[0157] As shown by reference number 915, the UE 120 may perform the CLI measurement in the first band. For example, the UE 120 may perform the CLI measurement on the CLI cell. As shown, scheduling (by the network node 110) on a second time resource of a TDD cell in a second band is restricted in association with the first time resource. For example, a scheduling restriction on a serving cell where CLI measurements are performed (that is, the CLI cell) may apply on all serving cells in different bands than the serving cell. As mentioned, the TDD cell may be configured on a different band than the CLI cell. The TDD cell may be one of the multiple cells configured by the configuration information described above. In some aspects, the restriction on scheduling may apply to all serving cells of the UE 120 in bands other than the first band. By restricting scheduling on the TDD cell in the second band (e.g., all serving cells in bands other than the first band) , the second time resource is effectively treated as a downlink symbol for reception only across all bands, thus improving compatibility with the capability of the UE 120 indicating no support (or not indicating support) for simultaneous transmission and reception across bands.
[0158] “Scheduling being restricted” may mean that a network node 110 is not allowed to schedule a communication on the second time resource, that a UE 120 is not required to transmit or receive a communication scheduled on the second time resource, or the like. For example, a scheduling restriction on a given cell (the TDD cell, in example 900) may mean that one or more of Example Rules 1 through 12 are applied for the second time resource and / or the TDD cell. The second time resource may include one or more OFDM symbols in which the UE 120 performs the CLI measurement. The second time resource may additionally include one or two OFDM symbols preceding the one or more OFDM symbols (for example, depending on a frequency range (FR1 or FR2) and subcarrier spacing (15 kHz, 30 kHz, 60 kHz, or 120 kHz) of the TDD cell, as defined by Example Rules 1 through 12) . Thus, the scheduling restriction may apply to OFDM symbols identified by Example Rules 1 through 12 above, and may restrict scheduling of communications identified by Example Rules 1 through 12. For example, when TDD inter-band CA is configured and the UE 120 supports half-DuplexTDD-CA-SameSCS-r16 but not simultaneousRxTxInterBandCA, the scheduling restrictions on a serving cell where CLI measurements are performed apply on all serving cells in different bands on the symbols that fully or partially overlap with restricted symbols.
[0159] In some aspects, the restriction on scheduling, described above, may apply if the CLI cell is configured as an HD TDD CA cell. Criteria for a given cell being configured as an HD TDD CA cell are defined above. For example, the scheduling on the second time resource may be restricted in association with the CLI cell being configured as a half-duplex TDD CA cell in association with a carrier aggregation configuration (the configuration information shown by reference number 905) of the UE. In some aspects, the restriction on scheduling, described above, may apply if any serving cell in the first band is configured as an HD TDD CA cell. For example, the scheduling on the second time resource may be restricted in association with a serving cell in the first band being configured as a half-duplex TDD CA cell in association with a carrier aggregation configuration (the configuration information shown by reference number 905) of the UE. In some aspects, the restriction on scheduling may apply irrespective of whether the CLI cell or any serving cell in the same band as the CLI cell is configured as an HD TDD CA cell.
[0160] In some aspects, the restriction on scheduling may apply if the TDD cell is configured as an HD TDD CA cell. Criteria for a given cell being configured as an HD TDD CA cell are defined above. In some aspects, the restriction on scheduling may apply if the TDD cell is configured as an HD TDD CA cell and the CLI cell is configured as a half-duplex TDD CA cell in association with a carrier aggregation configuration. In some aspects, the restriction on scheduling may apply if the TDD cell is configured as an HD TDD CA cell and if any serving cell in the first band is configured as an HD TDD CA cell. In some aspects, the restriction on scheduling may apply if the TDD cell is configured as an HD TDD CA cell irrespective of whether the CLI cell or any serving cell in the same band as the CLI cell is configured as an HD TDD CA cell.
[0161] In some aspects, the restriction on scheduling may apply if the TDD cell is configured as a TDD cell (that is, if the TDD cell is associated with a common or dedicated TDD UL / DL configuration as described elsewhere herein) . In some aspects, the restriction on scheduling may apply if the TDD cell is configured as an HD TDD CA cell and the CLI cell is configured as a half-duplex TDD CA cell in association with a carrier aggregation configuration. In some aspects, the restriction on scheduling may apply if the TDD cell is configured as a TDD cell and if any serving cell in the first band is configured as an HD TDD CA cell. In some aspects, the restriction on scheduling may apply if the TDD cell is configured as a TDD cell irrespective of whether the CLI cell or any serving cell in the same band as the CLI cell is configured as an HD TDD CA cell (this may reduce complexity relative to other approaches) .
[0162] As indicated above, Fig. 9 is provided as an example. Other examples may differ from what is described with regard to Fig. 9.
[0163] Fig. 10 is a diagram illustrating an example 1000 of CLI measurement in HD CA, in accordance with the present disclosure. As shown, example 1000 includes a UE (e.g., UE 120) and a network node (e.g., network node 110) . Example 1000 is an example where CLI measurements are treated as a higher-layer reception operation (for the purpose of directional collision handling) when the CLI cell is an HD TDD CA cell.
[0164] Example 1000 relates to three cases, referred to for brevity as Case 1, Case 2, and Case 3. These cases relate to which cell, of multiple cells configured for the UE 120, is a reference cell. Reference cells are defined in more detail in connection with Fig. 8. Each of these cases is described in detail below, along with description of how directional collisions may be handled in each of these cases. Then, signaling of example 1000 is described, incorporating the directional collision handling below, to resolve a potential collision between a CLI measurement in a first band and another communication in a second band.
[0165] In Case 1, the CLI cell is a reference cell. In this example, the CLI cell may have the lowest cell index across all HD TDD CA cells (defined above) in all bands. According to example 1000, if the CLI measurement is treated as a higher-layer configured reception operation, the CLI measurement may determine the reference direction as downlink in a similar way to a higher-layer configured semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) , physical downlink control channel (PDCCH) , or SPS channel state information reference signal (CSI-RS) . Hence, HD TDD CA rules for directional collision handling may be applied when CLI measurements are performed on the reference cell. In some aspects, one or more additional symbols (additional to those that overlap the CLI measurement resource) are treated as restricted symbols to account for the timing difference between CLI measurements and serving cell downlink or uplink signals
[0166] In Case 2, the CLI cell is in a same band as the reference cell. Thus, the UE 120 performs CLI measurements on the CLI cell, does not transmit to the reference cell, and is not required to receive from the reference cell. Thus, symbols on the reference cell, that overlap with CLI measurement resources (that is, restriction symbols) on the CLI cell, are treated as downlink symbols in accordance with rules for directional collision handling.
[0167] In Case 3, the CLI cell is in a different band than the reference cell (e.g., the CLI cell is in a first band and the reference cell is in a second band different than the first band) . In this case, when CLI measurement is treated as a higher-layer configured reception and directional collision handling rules are applied, the UE 120 may not perform CLI measurement if the CLI measurement resource (that is, symbols for UE to perform a CLI measurement) overlaps with a symbol where the reference direction is determined to be “uplink. ” In some aspects, this approach may take into account a timing difference between the CLI measurement and the serving cell on which uplink or downlink communications are to be performed.
[0168] For Case 1 and Case 2, a collision may arise when a CLI measurement is scheduled in a first time resource that overlaps at least one of (1) a resource configured as a semi-static uplink resource by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, (2) a higher-layer configured PUCCH, PUSCH, physical random access channel (PRACH) , or SRS, or (3) one or more symbols that are scheduled as downlink symbols by a DCI format other than DCI format 2_0. The UE 120 may apply directional collision handling according to the below Example Rules:
[0169] Example Rule 13: the UE 120 is not required to receive a higher-layer configured PDCCH, PDSCH, or CSI-RS on flexible symbols on the reference cell in a set of symbols, if the UE detects a DCI format scheduling a transmission on one or more symbols in the set of symbols on another cell.
[0170] Example Rule 14: the UE 120 does not transmit a PUCCH, PUSCH or PRACH that is configured by higher layers on a set of symbols on another cell if at least one symbol from the set of symbols is indicated as downlink (by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated) or is a symbol corresponding to a PDCCH, PDSCH, or CSI-RS reception that is configured by higher layers on the reference cell.
[0171] Example Rule 15: the UE 120 does not transmit an SRS that is configured by higher layers on a set of symbols on another cell if the set of symbols is indicated as downlink (by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated) or corresponds to a PDCCH, PDSCH or CSI-RS reception that is configured by higher layers on the reference cell.
[0172] Example Rule 16: The UE 120 assumes a symbol indicated as downlink or uplink by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated on another cell to be flexible, if the UE is respectively configured by higher layers to transmit SRS, PUCCH, PUSCH, or PRACH or to receive PDCCH, PDSCH, or CSI-RS on the reference cell.
[0173] For Case 3, a collision may arise when a CLI measurement is scheduled in a first time resource that overlaps at least one of (1) a resource configured as a semi-static uplink resource by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, or (2) a higher-layer configured PUCCH, PUSCH, physical random access channel (PRACH) , or SRS. The UE 120 may apply directional collision handling according to the below Example Rules:
[0174] Example Rule 17: the UE 120 does not receive a PDCCH, PDSCH or CSI-RS that is configured by higher layers on a set of symbols on another cell if at least one symbol from the set of symbols is indicated as uplink (by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated) or is a symbol corresponding to an SRS, PUCCH, PUSCH, or PRACH transmission that is configured by higher layers on the reference cell.
[0175] In some aspects, the UE 120 is configured with a CLI measurement on a CLI cell in a first band and another communication on a second band. In some aspects, the UE 120 may skip the other communication. For example, the first band may include a reference cell of the UE 120 (e.g., the CLI cell or another cell in the first band may be a reference cell) . In this example, the UE 120 may identify CLI measurement resources of the CLI measurement as downlink symbols. The UE 120 may not transmit a signal to any cell in a resource that at least partially overlaps the CLI measurement resources, which may be referred to as skipping transmission of the signal.
[0176] In some aspects, the UE 120 may skip the CLI measurement. For example, the UE 120 may not perform the CLI measurement. The UE 120 may skip the CLI measurement on a symbol if the symbol is a restricted symbol for CLI measurement. A “restricted symbol for CLI measurement” may include any symbol that at least partially overlaps a symbol configured for another communication, such as a symbol scheduled or configured as an uplink symbol in a band (other than a band that includes the CLI cell) . An uplink symbol may be referred to as having an uplink direction. For example, for FR1, the UE may not be expected to perform CLI measurements on OFDM symbols on which the reference direction is determined as “uplink, ” or on 1 data symbol after an OFDM symbol with reference direction determined as “uplink, ” for a 15 kHz subcarrier spacing and a 30 kHz subcarrier spacing. As another example, for FR1, the UE may not be expected to perform CLI measurements on OFDM symbols on which the reference direction is determined as “uplink, ” or on 2 data symbols after an OFDM symbol with reference direction determined as “uplink, ” for a 60 kHz subcarrier spacing. As another example, for FR2, the UE may not be expected to perform CLI measurements on OFDM symbols on which the reference direction is determined as “uplink, ” or on 1 data symbol after an OFDM symbol with reference direction determined as “uplink, ” for a 60 kHz subcarrier spacing. As another example, for FR2, the UE may not be expected to perform CLI measurements on OFDM symbols on which the reference direction is determined as “uplink, ” or on 2 data symbols after an OFDM symbol with reference direction determined as “uplink, ” for a 120 kHz subcarrier spacing.
[0177] Turning now to description of example 1000, as shown by reference number 1005, the UE 120 may transmit, and the network node 110 may receive, capability information. The capability information may indicate one or more capabilities supported by the UE 120. For example, the capability information may indicate that the UE 120 supports directional collision handling for HD CA within a cell group (e.g., the capability information may include half-DuplexTDD-CA-SameSCS-r16) . In some aspects, the capability information may indicate that the UE 120 does not support simultaneous transmission in a first band and reception in a second band. For example, the capability information may omit a parameter simultaneousRxTxInterBandCA. As another example, the parameter simultaneousRxTxInterBandCA may not indicate a band combination of a CA configuration of the UE. Thus, the UE may support directional collision handling, and may not support simultaneous transmission in a first band and reception in a second band (e.g., the UE 120 may support half-DuplexTDD-CA-SameSCS-r16 but not simultaneousRxTxInterBandCA) .
[0178] As shown by reference number 1010, the network node 110 may transmit, and the UE 120 may receive, configuration information. In some aspects, the configuration information may include a carrier aggregation configuration. For example, the configuration information may configure two or more serving cells for carrier aggregation. The configuration information may configure a plurality of cells as serving cells. The plurality of cells may include a first cell (e.g., a CLI cell) on a first band and a second cell (e.g., an HD TDD CA cell) on a second band, as described below. Thus, TDD inter-band CA is configured.
[0179] In some aspects, the configuration information may configure a set of cells, of the plurality of cells, to have directional collision handling enabled. For example, the UE may provide the capability information indicating that the UE supports directional collision handling for HD CA within a cell group, and the network node 110 may configure the set of cells to have directional collision handling enabled in accordance with the capability information.
[0180] In some aspects, a cell of the plurality of cells may be configured as an HD TDD CA cell. An HD TDD CA cell may include a cell that is configured to have directional collision handling enabled. For example, a cell may be an HD TDD CA cell if the cell is configured with directional collision handling enabled for a UE 120 that indicates support for directional collision handling (via the half-DuplexTDD-CA-SameSCS-r16 capability) and that is not configured to monitor a physical downlink control channel (PDCCH) for detection of a DCI format (e.g., DCI format 2_0) for dynamically adjusting slot formats on any of multiple serving cells configured for the UE 120.
[0181] The configuration information may include a configuration of a CLI measurement on a first time resource of a CLI cell. For example, the CLI cell may be one of the multiple cells configured by the configuration information. The CLI cell may be an HD TDD CA cell, configured as described above. The configuration of the CLI measurement may be received separately from, or with, a configuration of the CLI cell (e.g., a serving cell configuration of the CLI cell, a carrier aggregation configuration) . The CLI cell may be in a first band. For example, the first band (in combination with a second band described below) may belong to a band combination for which the UE does not indicate support of simultaneous transmission and reception across bands (e.g., transmission in the first band and reception in the second band, or transmission in the second band and reception in the first band) . A reference cell of the UE 120 may be included in the first band or in the second band.
[0182] As shown by reference number 1015, the UE 120 may perform the CLI measurement or may perform a communication on the second HD TDD CA cell. For example, the UE 120 may perform only one of the CLI measurement or the communication. The UE 120 may perform the CLI measurement or the communication in accordance with whether the reference cell of the UE 120 is in the first band (as in Case 1 or Case 2) or the second band (as in Case 3) .
[0183] For example, if the reference cell is in the first band, the UE 120 may perform the CLI measurement and skip transmission of the communication (e.g., in a time resource for the communication that is configured as an uplink or flexible resource and that overlaps CLI measurement resources of the CLI measurement) if the communication is a higher-layer configured uplink transmission. That is, the UE 120 may not transmit a higher layer configured UL transmission (such as a configured PUCCH, PUSCH, PRACH or SRS transmission) on a symbol on the second HD TDD CA cell if the symbol on the second HD TDD CA cell is indicated as uplink or flexible by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated and the symbol overlaps with one or more restriction symbols for uplink transmission of the CLI measurement. Skipping transmission of the communication may include dropping the communication, delaying the communication, or avoiding scheduling of the communication on the symbol on the second HD TDD CA cell.
[0184] As another example, if the reference cell is in the first band, the UE 120 may transmit the communication on one or more symbols, and may skip the CLI measurement on one or more other symbols that overlap the one or more symbols of the communication, if the communication is scheduled by a DCI format detected by the UE 120 on the second HD TDD CA cell. For example, the UE 120 may not be required to perform CLI measurements on a symbol if the symbol is a restricted symbol for CLI measurements, and if the symbol corresponds to a transmission scheduled by a DCI format detected by the UE 120 on the second HD TDD CA cell.
[0185] As another example, if the reference cell is in the second band, the UE 120 may transmit the communication and may skip the CLI measurements if a symbol of the communication is indicated as an uplink symbol by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, or corresponds to an SRS, PUCCH, PUSCH, or PRACH transmission that is configured by a higher layer (that is, a higher-layer configured communication) on the reference cell.
[0186] Thus, if (1) a UE is configured with multiple serving cells and is provided with directionalCollisionHandling-r16 = 'enabled' for a set of serving cell (s) among the configured multiple serving cells, (2) the UE indicates support of half-DuplexTDD-CA-SameSCS-r16 capability, (3) the UE is not configured to monitor PDCCH for detection of DCI format 2_0 on any of the multiple serving cells, (4) the reference cell and another cell among the cells configured with directionalCollisionHandling-r16 operate in different frequency bands, and (5) the UE is configured to perform CLI measurements in the reference cell or in a cell in the same band as the reference cell, then the UE is not required to receive a higher layer configured CLI measurement resource in a set of symbols, if the set of symbols overlaps with restricted symbols for CLI measurements that correspond to a transmission scheduled by a DCI format detected by the UE on another cell.
[0187] Furthermore, if (1) a UE is configured with multiple serving cells and is provided with directionalCollisionHandling-r16 = 'enabled' for a set of serving cell (s) among the configured multiple serving cells, (2) the UE indicates support of half-DuplexTDD-CA-SameSCS-r16 capability, (3) the UE is not configured to monitor PDCCH for detection of DCI format 2_0 on any of the multiple serving cells, and (4) the reference cell and another cell among the cells configured with directionalCollisionHandling-r16 operate in different frequency bands, and (5) the UE is configured to perform CLI measurements in the reference cell or in a cell in the same band as the reference cell, then the UE does not transmit a PUCCH, PUSCH or PRACH that is configured by higher layers on a set of symbols on another cell if at least one symbol from the set of symbols overlaps with the restricted symbols for uplink transmission on the cell where CLI measurement is configured.
[0188] Furthermore, if (1) a UE is configured with multiple serving cells and is provided with directionalCollisionHandling-r16 = 'enabled' for a set of serving cell (s) among the configured multiple serving cells, (2) the UE indicates support of half-DuplexTDD-CA-SameSCS-r16 capability, (3) the UE is not configured to monitor PDCCH for detection of DCI format 2_0 on any of the multiple serving cells, (4) the reference cell and another cell among the cells configured with directionalCollisionHandling-r16 operate in different frequency bands, and (5) the UE is configured to perform CLI measurements in the reference cell or in a cell in the same band as the reference cell, then the UE does not transmit an SRS that is configured by higher layers on a set of symbols on another cell if the set of symbols corresponds to restricted symbols for uplink transmission on the cell where CLI measurement is configured.
[0189] Furthermore, if (1) a UE is configured with multiple serving cells and is provided with directionalCollisionHandling-r16 = 'enabled' for a set of serving cell (s) among the configured multiple serving cells, (2) the UE indicates support of half-DuplexTDD-CA-SameSCS-r16 capability, (3) the UE is not configured to monitor PDCCH for detection of DCI format 2_0 on any of the multiple serving cells, (4) the reference cell and another cell among the cells configured with directionalCollisionHandling-r16 operate in different frequency bands, and (5) the UE is configured to perform CLI measurements in the reference cell or in a cell in the same band as the reference cell, then the UE assumes a symbol indicated as uplink by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated on another cell to be flexible, if the symbol overlaps with the restricted symbols for uplink transmission on the cell where the UE is configured by higher layers to perform CLI measurements.
[0190] Furthermore, if (1) a UE is configured with multiple serving cells and is provided with directionalCollisionHandling-r16 = 'enabled' for a set of serving cell (s) among the configured multiple serving cells, (2) the UE indicates support of half- DuplexTDD-CA-SameSCS-r16 capability, (3) the UE is not configured to monitor PDCCH for detection of DCI format 2_0 on any of the multiple serving cells, (4) the reference cell and another cell among the cells configured with directionalCollisionHandling-r16 operate in different frequency bands, and (5) the UE is configured by a higher layer to perform a CLI measurement on another cell (e.g., other than the reference cell) then the UE does not perform higher layer configured CLI measurements on any of the restricted symbols for CLI measurement that corresponds to a set of symbols that is indicated as uplink by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated or corresponds to an SRS, PUCCH, PUSCH, or PRACH transmission that is configured by higher layers on the reference cell.
[0191] As indicated above, Fig. 10 is provided as an example. Other examples may differ from what is described with regard to Fig. 10.
[0192] Fig. 11 is a diagram illustrating an example process 1100 performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure. Example process 1100 is an example where the apparatus or the UE (e.g., UE 120) performs operations associated with cross-link interference measurement in half-duplex carrier aggregation.
[0193] As shown in Fig. 11, in some aspects, process 1100 may include transmitting capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group (block 1110) . For example, the UE or apparatus (e.g., using transmission component 1404 and / or communication manager 1406, depicted in Fig. 14) may transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group, as described above.
[0194] As further shown in Fig. 11, in some aspects, process 1100 may include receiving a configuration of a CLI measurement on a first time resource of a CLI cell in a first band (block 1120) . For example, the UE or apparatus (e.g., using reception component 1402 and / or communication manager 1406, depicted in Fig. 14) may receive a configuration of a CLI measurement on a first time resource of a CLI cell in a first band, as described above.
[0195] As further shown in Fig. 11, in some aspects, process 1100 may include performing the CLI measurement in the first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource (block 1130) . For example, the UE (e.g., using communication manager 1406, depicted in Fig. 14) may perform the CLI measurement in the first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource, as described above.
[0196] Process 1100 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0197] In a first aspect, the scheduling on the second time resource of the TDD cell is restricted in association with the UE not supporting simultaneous transmission in a first band and reception in a second band.
[0198] In a second aspect, alone or in combination with the first aspect, the second time resource at least partially overlaps the first time resource.
[0199] In a third aspect, alone or in combination with one or more of the first and second aspects, the scheduling on the second time resource is restricted in association with the CLI cell being configured as a half-duplex TDD carrier aggregation cell in association with a carrier aggregation configuration of the UE.
[0200] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the CLI cell is configured as a half-duplex TDD carrier aggregation cell in accordance with directional collision handling being enabled for the CLI cell, the UE supporting directional collision handling for the CLI cell, and the UE not being configured to monitor a physical downlink control channel for detection of a DCI format on any serving cell of multiple serving cells.
[0201] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the scheduling on the second time resource is restricted in association with a serving cell in the first band being configured as a half-duplex TDD carrier aggregation cell in association with a carrier aggregation configuration of the UE.
[0202] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the scheduling on the second time resource is restricted in association with the TDD cell being configured as a half-duplex TDD carrier aggregation cell.
[0203] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the scheduling on the second time resource is restricted in association with the TDD cell being configured with a TDD configuration.
[0204] Although Fig. 11 shows example blocks of process 1100, in some aspects, process 1100 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 11. Additionally, or alternatively, two or more of the blocks of process 1100 may be performed in parallel.
[0205] Fig. 12 is a diagram illustrating an example process 1200 performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure. Example process 1200 is an example where the apparatus or the UE (e.g., UE 120) performs operations associated with cross-link interference measurement in half-duplex carrier aggregation.
[0206] As shown in Fig. 12, in some aspects, process 1200 may include transmitting capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group (block 1210) . For example, the UE or apparatus (e.g., using transmission component 1404 and / or communication manager 1406, depicted in Fig. 14) may transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group, as described above.
[0207] As further shown in Fig. 12, in some aspects, process 1200 may include receiving a configuration of a CLI measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex TDD carrier aggregation cell associated with a carrier aggregation configuration of the UE (block 1220) . For example, the UE (e.g., using reception component 1402 and / or communication manager 1406, depicted in Fig. 14) may receive a configuration of a CLI measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex TDD carrier aggregation cell associated with a carrier aggregation configuration of the UE, as described above.
[0208] As further shown in Fig. 12, in some aspects, process 1200 may include performing the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the UE is in the first band or the second band (block 1230) . For example, the UE (e.g., using communication manager 1406, depicted in Fig. 14) may perform the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the UE is in the first band or the second band, as described above.
[0209] Process 1200 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0210] In a first aspect, performing the CLI measurement on the CLI cell in the first band or the communication on the second half-duplex TDD carrier aggregation cell in the second band further comprises performing the CLI measurement or the communication in association with the UE not supporting simultaneous transmission in a first band and reception in a second band.
[0211] In a second aspect, alone or in combination with the first aspect, performing the CLI measurement in the first band or the communication on the second half-duplex TDD carrier aggregation cell in the second band further comprises performing the CLI measurement and skipping transmission of the communication on the second half-duplex TDD carrier aggregation cell, wherein the reference cell is in the first band.
[0212] In a third aspect, alone or in combination with one or more of the first and second aspects, a time resource for the communication is configured as an uplink or flexible resource, and the time resource for the communication overlaps a restricted symbol associated with the CLI measurement.
[0213] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the communication is a higher-layer configured uplink transmission.
[0214] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, performing the CLI measurement in the first band or the communication on the second half-duplex TDD carrier aggregation cell in the second band further comprises performing the communication and skipping the CLI measurement on the first half-duplex TDD carrier aggregation cell, wherein the reference cell is in the first band.
[0215] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the communication is scheduled by a downlink control information format detected by the UE on the second half-duplex TDD carrier aggregation cell.
[0216] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, a restricted symbol for the CLI measurement overlaps a resource corresponding to the communication.
[0217] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the reference cell is the CLI cell.
[0218] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the reference cell is another cell, in the first band and other than the CLI cell, associated with the carrier aggregation configuration.
[0219] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, performing the CLI measurement in the first band or a communication on the second half-duplex TDD carrier aggregation cell in the second band further comprises performing the communication and skipping the CLI measurement on the first half-duplex TDD carrier aggregation cell, wherein the reference cell is in the second band.
[0220] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the communication is on an uplink symbol of the second half-duplex TDD carrier aggregation cell, and a restricted resource associated with the CLI measurement corresponds to the uplink symbol.
[0221] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the communication is a higher-layer configured uplink transmission.
[0222] In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the reference cell is the second half-duplex TDD carrier aggregation cell.
[0223] Although Fig. 12 shows example blocks of process 1200, in some aspects, process 1200 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 12. Additionally, or alternatively, two or more of the blocks of process 1200 may be performed in parallel.
[0224] Fig. 13 is a diagram illustrating an example process 1300 performed, for example, at a network node or an apparatus of a network node, in accordance with the present disclosure. Example process 1300 is an example where the apparatus or the network node (e.g., network node 110) performs operations associated with cross-link interference measurement in half-duplex carrier aggregation.
[0225] As shown in Fig. 13, in some aspects, process 1300 may include receiving capability information indicating that a UE supports directional collision handling for half-duplex carrier aggregation within a cell group (block 1310) . For example, the network node (e.g., using reception component 1502 and / or communication manager 1506, depicted in Fig. 15) may receive capability information indicating that a UE supports directional collision handling for half-duplex carrier aggregation within a cell group, as described above.
[0226] As further shown in Fig. 13, in some aspects, process 1300 may include transmitting a configuration of a CLI measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource (block 1320) . For example, the network node (e.g., using transmission component 1504 and / or communication manager 1506, depicted in Fig. 15) may transmit a configuration of a CLI measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource, as described above.
[0227] Process 1300 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0228] In a first aspect, the scheduling on the second time resource of the TDD cell is restricted in association with the UE not supporting simultaneous transmission in a first band and reception in a second band.
[0229] In a second aspect, alone or in combination with the first aspect, the second time resource at least partially overlaps the first time resource.
[0230] In a third aspect, alone or in combination with one or more of the first and second aspects, the scheduling on the second time resource is restricted in association with the CLI cell being configured as a half-duplex TDD carrier aggregation cell in association with a carrier aggregation configuration of the UE.
[0231] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the CLI cell is configured as a half-duplex TDD carrier aggregation cell in accordance with directional collision handling being enabled for the CLI cell, the UE supporting directional collision handling for the CLI cell, and the UE not being configured to monitor a physical downlink control channel for detection of a DCI format on any serving cell of multiple serving cells.
[0232] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the scheduling on the second time resource is restricted in association with a serving cell in the first band being configured as a half-duplex TDD carrier aggregation cell in association with a carrier aggregation configuration of the UE.
[0233] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the scheduling on the second time resource is restricted in association with the TDD cell being configured as a half-duplex TDD carrier aggregation cell.
[0234] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the scheduling on the second time resource is restricted in association with the TDD cell being configured with a TDD configuration.
[0235] Although Fig. 13 shows example blocks of process 1300, in some aspects, process 1300 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 13. Additionally, or alternatively, two or more of the blocks of process 1300 may be performed in parallel.
[0236] Fig. 14 is a diagram of an example apparatus 1400 for wireless communication, in accordance with the present disclosure. The apparatus 1400 may be a UE, or a UE may include the apparatus 1400. In some aspects, the apparatus 1400 includes a reception component 1402, a transmission component 1404, and / or a communication manager 1406, which may be in communication with one another (for example, via one or more buses and / or one or more other components) . In some aspects, the communication manager 1406 is the communication manager 140 described in connection with Fig. 1. As shown, the apparatus 1400 may communicate with another apparatus 1408, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 1402 and the transmission component 1404.
[0237] In some aspects, the apparatus 1400 may be configured to perform one or more operations described herein in connection with Figs. 4-10. Additionally, or alternatively, the apparatus 1400 may be configured to perform one or more processes described herein, such as process 1100 of Fig. 11, process 1200 of Fig. 12, or a combination thereof. In some aspects, the apparatus 1400 and / or one or more components shown in Fig. 14 may include one or more components of the UE described in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 14 may be implemented within one or more components described in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.
[0238] The reception component 1402 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1408. The reception component 1402 may provide received communications to one or more other components of the apparatus 1400. In some aspects, the reception component 1402 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 1400. In some aspects, the reception component 1402 may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receive processors, one or more controllers / processors, one or more memories, or a combination thereof, of the UE described in connection with Fig. 2.
[0239] The transmission component 1404 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1408. In some aspects, one or more other components of the apparatus 1400 may generate communications and may provide the generated communications to the transmission component 1404 for transmission to the apparatus 1408. In some aspects, the transmission component 1404 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1408. In some aspects, the transmission component 1404 may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, one or more memories, or a combination thereof, of the UE described in connection with Fig. 2. In some aspects, the transmission component 1404 may be co-located with the reception component 1402 in one or more transceivers.
[0240] The communication manager 1406 may support operations of the reception component 1402 and / or the transmission component 1404. For example, the communication manager 1406 may receive information associated with configuring reception of communications by the reception component 1402 and / or transmission of communications by the transmission component 1404. Additionally, or alternatively, the communication manager 1406 may generate and / or provide control information to the reception component 1402 and / or the transmission component 1404 to control reception and / or transmission of communications.
[0241] The transmission component 1404 may transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group. The reception component 1402 may receive a configuration of a CLI measurement on a first time resource of a CLI cell in a first band. The communication manager 1406 may perform the CLI measurement in the first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource.
[0242] The transmission component 1404 may transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group. The reception component 1402 may receive a configuration of a CLI measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex TDD carrier aggregation cell associated with a carrier aggregation configuration of the UE. The communication manager 1406 may perform the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the UE is in the first band or the second band.
[0243] The number and arrangement of components shown in Fig. 14 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 14. Furthermore, two or more components shown in Fig. 14 may be implemented within a single component, or a single component shown in Fig. 14 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 14 may perform one or more functions described as being performed by another set of components shown in Fig. 14.
[0244] Fig. 15 is a diagram of an example apparatus 1500 for wireless communication, in accordance with the present disclosure. The apparatus 1500 may be a network node, or a network node may include the apparatus 1500. In some aspects, the apparatus 1500 includes a reception component 1502, a transmission component 1504, and / or a communication manager 1506, which may be in communication with one another (for example, via one or more buses and / or one or more other components) . In some aspects, the communication manager 1506 is the communication manager 150 described in connection with Fig. 1. As shown, the apparatus 1500 may communicate with another apparatus 1508, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 1502 and the transmission component 1504.
[0245] In some aspects, the apparatus 1500 may be configured to perform one or more operations described herein in connection with Figs. 4-10. Additionally, or alternatively, the apparatus 1500 may be configured to perform one or more processes described herein, such as process 1300 of Fig. 13, or a combination thereof. In some aspects, the apparatus 1500 and / or one or more components shown in Fig. 15 may include one or more components of the network node described in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 15 may be implemented within one or more components described in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.
[0246] The reception component 1502 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1508. The reception component 1502 may provide received communications to one or more other components of the apparatus 1500. In some aspects, the reception component 1502 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 1500. In some aspects, the reception component 1502 may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receive processors, one or more controllers / processors, one or more memories, or a combination thereof, of the network node described in connection with Fig. 2. In some aspects, the reception component 1502 and / or the transmission component 1504 may include or may be included in a network interface. The network interface may be configured to obtain and / or output signals for the apparatus 1500 via one or more communications links, such as a backhaul link, a midhaul link, and / or a fronthaul link.
[0247] The transmission component 1504 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1508. In some aspects, one or more other components of the apparatus 1500 may generate communications and may provide the generated communications to the transmission component 1504 for transmission to the apparatus 1508. In some aspects, the transmission component 1504 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1508. In some aspects, the transmission component 1504 may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, one or more memories, or a combination thereof, of the network node described in connection with Fig. 2. In some aspects, the transmission component 1504 may be co-located with the reception component 1502 in one or more transceivers.
[0248] The communication manager 1506 may support operations of the reception component 1502 and / or the transmission component 1504. For example, the communication manager 1506 may receive information associated with configuring reception of communications by the reception component 1502 and / or transmission of communications by the transmission component 1504. Additionally, or alternatively, the communication manager 1506 may generate and / or provide control information to the reception component 1502 and / or the transmission component 1504 to control reception and / or transmission of communications.
[0249] The reception component 1502 may receive capability information indicating that a UE supports directional collision handling for half-duplex carrier aggregation within a cell group. The transmission component 1504 may transmit a configuration of a CLI measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a TDD cell in a second band is restricted in association with the first time resource.
[0250] The number and arrangement of components shown in Fig. 15 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 15. Furthermore, two or more components shown in Fig. 15 may be implemented within a single component, or a single component shown in Fig. 15 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 15 may perform one or more functions described as being performed by another set of components shown in Fig. 15.
[0251] The following provides an overview of some Aspects of the present disclosure:
[0252] Aspect 1: A method of wireless communication performed by a user equipment (UE) , comprising: transmitting capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; receiving a configuration of a cross-link interference (CLI) measurement on a first time resource of a CLI cell in a first band; and performing the CLI measurement in the first band, wherein scheduling on a second time resource of a time division duplexing (TDD) cell in a second band is restricted in association with the first time re source.
[0253] Aspect 2: The method of Aspect 1, wherein the scheduling on the second time resource of the TDD cell is restricted in association with the UE not supporting simultaneous transmission in a first band and reception in a second band.
[0254] Aspect 3: The method of any of Aspects 1-2, wherein the second time resource at least partially overlaps the first time resource.
[0255] Aspect 4: The method of any of Aspects 1-3, wherein the scheduling on the second time resource is restricted in association with the CLI cell being configured as a half-duplex TDD carrier aggregation cell in association with a carrier aggregation configuration of the UE.
[0256] Aspect 5: The method of Aspect 4, wherein the CLI cell is configured as a half-duplex TDD carrier aggregation cell in accordance with: directional collision handling being enabled for the CLI cell, the UE supporting directional collision handling for the CLI cell, and the UE not being configured to monitor a physical downlink control channel for detection of a downlink control information (DCI) format on any serving cell of multiple serving cells.
[0257] Aspect 6: The method of any of Aspects 1-5, wherein the scheduling on the second time resource is restricted in association with a serving cell in the first band being configured as a half-duplex TDD carrier aggregation cell in association with a carrier aggregation configuration of the UE.
[0258] Aspect 7: The method of any of Aspects 1-6, wherein the scheduling on the second time resource is restricted in association with the TDD cell being configured as a half-duplex TDD carrier aggregation cell.
[0259] Aspect 8: The method of any of Aspects 1-7, wherein the scheduling on the second time resource is restricted in association with the TDD cell being configured with a TDD configuration.
[0260] Aspect 9: A method of wireless communication performed by a user equipment (UE) , comprising: transmitting capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group; receiving a configuration of a cross-link interference (CLI) measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex time division duplexing (TDD) carrier aggregation cell associated with a carrier aggregation configuration of the UE; and performing the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the UE is in the first band or the second band.
[0261] Aspect 10: The method of Aspect 9, wherein performing the CLI measurement on the CLI cell in the first band or the communication on the second half-duplex TDD carrier aggregation cell in the second band further comprises performing the CLI measurement or the communication in association with the UE not supporting simultaneous transmission in a first band and reception in a second band.
[0262] Aspect 11: The method of any of Aspects 9-10, wherein performing the CLI measurement in the first band or the communication on the second half-duplex TDD carrier aggregation cell in the second band further comprises performing the CLI measurement and skipping transmission of the communication on the second half-duplex TDD carrier aggregation cell, wherein the reference cell is in the first band.
[0263] Aspect 12: The method of Aspect 11, wherein a time resource for the communication is configured as an uplink or flexible resource, and wherein the time resource for the communication overlaps a restricted symbol associated with the CLI measurement.
[0264] Aspect 13: The method of Aspect 11, wherein the communication is a higher-layer configured uplink transmission.
[0265] Aspect 14: The method of any of Aspects 9-13, wherein performing the CLI measurement in the first band or the communication on the second half-duplex TDD carrier aggregation cell in the second band further comprises performing the communication and skipping the CLI measurement on the first half-duplex TDD carrier aggregation cell, wherein the reference cell is in the first band.
[0266] Aspect 15: The method of Aspect 14, wherein the communication is scheduled by a downlink control information format detected by the UE on the second half-duplex TDD carrier aggregation cell.
[0267] Aspect 16: The method of Aspect 14, wherein a restricted symbol for the CLI measurement overlaps a resource corresponding to the communication.
[0268] Aspect 17: The method of any of Aspects 9-16, wherein the reference cell is the CLI cell.
[0269] Aspect 18: The method of any of Aspects 9-17, wherein the reference cell is another cell, in the first band and other than the CLI cell, associated with the carrier aggregation configuration.
[0270] Aspect 19: The method of any of Aspects 9-18, wherein performing the CLI measurement in the first band or a communication on the second half-duplex TDD carrier aggregation cell in the second band further comprises performing the communication and skipping the CLI measurement on the first half-duplex TDD carrier aggregation cell, wherein the reference cell is in the second band.
[0271] Aspect 20: The method of Aspect 19, wherein the communication is on an uplink symbol of the second half-duplex TDD carrier aggregation cell, and wherein a restricted resource associated with the CLI measurement corresponds to the uplink symbol.
[0272] Aspect 21: The method of Aspect 19, wherein the communication is a higher-layer configured uplink transmission.
[0273] Aspect 22: The method of Aspect 19, wherein the reference cell is the second half-duplex TDD carrier aggregation cell.
[0274] Aspect 23: A method of wireless communication performed by a network node, comprising: receiving capability information indicating that a user equipment (UE) supports directional collision handling for half-duplex carrier aggregation within a cell group; and transmitting a configuration of a cross-link interference (CLI) measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a time division duplexing (TDD) cell in a second band is restricted in association with the first time resource.
[0275] Aspect 24: The method of Aspect 23, wherein the scheduling on the second time resource of the TDD cell is restricted in association with the UE not supporting simultaneous transmission in a first band and reception in a second band.
[0276] Aspect 25: The method of any of Aspects 23-24, wherein the second time resource at least partially overlaps the first time resource.
[0277] Aspect 26: The method of any of Aspects 23-25, wherein the scheduling on the second time resource is restricted in association with the CLI cell being configured as a half-duplex TDD carrier aggregation cell in association with a carrier aggregation configuration of the UE.
[0278] Aspect 27: The method of Aspect 26, wherein the CLI cell is configured as a half-duplex TDD carrier aggregation cell in accordance with: directional collision handling being enabled for the CLI cell, the UE supporting directional collision handling for the CLI cell, and the UE not being configured to monitor a physical downlink control channel for detection of a downlink control information (DCI) format on any serving cell of multiple serving cells.
[0279] Aspect 28: The method of any of Aspects 23-27, wherein the scheduling on the second time resource is restricted in association with a serving cell in the first band being configured as a half-duplex TDD carrier aggregation cell in association with a carrier aggregation configuration of the UE.
[0280] Aspect 29: The method of any of Aspects 23-28, wherein the scheduling on the second time resource is restricted in association with the TDD cell being configured as a half-duplex TDD carrier aggregation cell.
[0281] Aspect 30: The method of any of Aspects 23-29, wherein the scheduling on the second time resource is restricted in association with the TDD cell being configured with a TDD configuration.
[0282] Aspect 31: An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 1-30.
[0283] Aspect 32: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 1-30.
[0284] Aspect 33: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-30.
[0285] Aspect 34: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 1-30.
[0286] Aspect 35: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-30.
[0287] Aspect 36: A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 1-30.
[0288] Aspect 37: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 1-30.
[0289] The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.
[0290] As used herein, the term “component” is intended to be broadly construed as hardware or a combination of hardware and at least one of software or firmware. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware or a combination of hardware and software. It will be apparent that systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems or methods is not limiting of the aspects. Thus, the operation and behavior of the systems or methods are described herein without reference to specific software code, because those skilled in the art will understand that software and hardware can be designed to implement the systems or methods based, at least in part, on the description herein. A component being configured to perform a function means that the component has a capability to perform the function, and does not require the function to be actually performed by the component, unless noted otherwise.
[0291] As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples.
[0292] As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination with multiples of the same element (for example, a + a, a + a + a, a + a + b, a + a + c, a + b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c) .
[0293] No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more. ” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” and similar terms are intended to be open-ended terms that do not limit an element that they modify (for example, an element “having” A may also have B) . Further, the phrase “based on” is intended to mean “based on or otherwise in association with” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or, ” unless explicitly stated otherwise (for example, if used in combination with “either” or “only one of” ) . It should be understood that “one or more” is equivalent to “at least one. ”
[0294] Even though particular combinations of features are recited in the claims or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features may be combined in ways not specifically recited in the claims or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set.
Claims
1.An apparatus for wireless communication at a user equipment (UE) , comprising:one or more memories; andone or more processors, coupled to the one or more memories, configured to cause the UE to:transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group;receive a configuration of a cross-link interference (CLI) measurement on a first time resource of a CLI cell in a first band; andperform the CLI measurement in the first band, wherein scheduling on a second time resource of a time division duplexing (TDD) cell in a second band is restricted in association with the first time resource.2.The apparatus of claim 1, wherein the scheduling on the second time resource of the TDD cell is restricted in association with the UE not supporting simultaneous transmission in a first band and reception in a second band.3.The apparatus of claim 1, wherein the second time resource at least partially overlaps the first time resource.4.The apparatus of claim 1, wherein the scheduling on the second time resource is restricted in association with the CLI cell being configured as a half-duplex TDD carrier aggregation cell in association with a carrier aggregation configuration of the UE.5.The apparatus of claim 4, wherein the CLI cell is configured as a half-duplex TDD carrier aggregation cell in accordance with:directional collision handling being enabled for the CLI cell,the UE supporting directional collision handling for the CLI cell, andthe UE not being configured to monitor a physical downlink control channel for detection of a downlink control information (DCI) format on any serving cell of multiple serving cells.6.The apparatus of claim 1, wherein the scheduling on the second time resource is restricted in association with a serving cell in the first band being configured as a half-duplex TDD carrier aggregation cell in association with a carrier aggregation configuration of the UE.7.The apparatus of claim 1, wherein the scheduling on the second time resource is restricted in association with the TDD cell being configured as a half-duplex TDD carrier aggregation cell.8.The apparatus of claim 1, wherein the scheduling on the second time resource is restricted in association with the TDD cell being configured with a TDD configuration.9.An apparatus for wireless communication at a user equipment (UE) , comprising:one or more memories; andone or more processors, coupled to the one or more memories, configured to cause the UE to:transmit capability information indicating that the UE supports directional collision handling for half-duplex carrier aggregation within a cell group;receive a configuration of a cross-link interference (CLI) measurement on a CLI cell in a first band, wherein the CLI cell is a first half-duplex time division duplexing (TDD) carrier aggregation cell associated with a carrier aggregation configuration of the UE; andperform the CLI measurement in the first band or a communication on a second half-duplex TDD carrier aggregation cell in a second band in accordance with whether a reference cell of the UE is in the first band or the second band.10.The apparatus of claim 9, wherein the one or more processors, to cause the UE to perform the CLI measurement on the CLI cell in the first band or the communication on the second half-duplex TDD carrier aggregation cell in the second band, are configured to cause the UE to perform the CLI measurement or the communication in association with the UE not supporting simultaneous transmission in a first band and reception in a second band.11.The apparatus of claim 9, wherein the one or more processors, to cause the UE to perform the CLI measurement in the first band or the communication on the second half-duplex TDD carrier aggregation cell in the second band, are configured to cause the UE to perform the CLI measurement and skip transmission of the communication on the second half-duplex TDD carrier aggregation cell, wherein the reference cell is in the first band.12.The apparatus of claim 11, wherein a time resource for the communication is configured as an uplink or flexible resource, and wherein the time resource for the communication overlaps a restricted symbol associated with the CLI measurement.13.The apparatus of claim 11, wherein the communication is a higher-layer configured uplink transmission.14.The apparatus of claim 9, wherein the one or more processors, to cause the UE to perform the CLI measurement in the first band or the communication on the second half-duplex TDD carrier aggregation cell in the second band, are configured to cause the UE to perform the communication and skip the CLI measurement on the first half-duplex TDD carrier aggregation cell, wherein the reference cell is in the first band.15.The apparatus of claim 14, wherein the communication is scheduled by a downlink control information format detected by the UE on the second half-duplex TDD carrier aggregation cell.16.The apparatus of claim 14, wherein a restricted symbol for the CLI measurement overlaps a resource corresponding to the communication.17.The apparatus of claim 9, wherein the one or more processors, to cause the UE to perform the CLI measurement in the first band or the communication on the second half-duplex TDD carrier aggregation cell in the second band, are configured to cause the UE to perform the communication and skip the CLI measurement on the first half-duplex TDD carrier aggregation cell, wherein the reference cell is in the second band.18.The apparatus of claim 17, wherein the communication is on an uplink symbol of the second half-duplex TDD carrier aggregation cell, and wherein a restricted resource associated with the CLI measurement corresponds to the uplink symbol.19.The apparatus of claim 17, wherein the communication is a higher-layer configured uplink transmission.20.An apparatus for wireless communication at a network node, comprising:one or more memories; andone or more processors, coupled to the one or more memories, configured to cause the network node to:receive capability information indicating that a user equipment (UE) supports directional collision handling for half-duplex carrier aggregation within a cell group; andtransmit a configuration of a cross-link interference (CLI) measurement on a first time resource of a CLI cell in a first band, wherein scheduling on a second time resource of a time division duplexing (TDD) cell in a second band is restricted in association with the first time resource.
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