Channel sensing procedure for communications at integrated access and backhaul nodes

Abstract

The present disclosure provides systems, methods, and apparatuses including computer programs encoded on computer storage media for performing separate channel sensing procedures for transmissions via a mobile terminal (MT) role and transmissions via a distributed unit (DU) role of an integrated access and backhaul (IAB) node. In one aspect, the IAB node can obtain channel access for transmissions via the MT role by performing a first channel sensing procedure and can obtain channel access for transmissions via the DU role by performing a second channel sensing procedure. The IAB node can determine a first timing of a first sensing slot for performing the first channel sensing procedure and a second timing of a second sensing slot for performing the second channel sensing procedure according to capabilities of the IAB node and transmission timing of the transmissions via the MT role and the DU role.

Description

[0001] Cross-reference to related applications

[0002] This patent application claims the benefits of U.S. Provisional Patent Application No. 62 / 042,493, filed June 22, 2020, entitled “Channel Sensing Procedures for Communications at an Integrated Access and Backhaul Node”, and U.S. Patent Application No. 17 / 235,037, filed April 20, 2021, entitled “Channel Sensing Procedures for Communications at an Integrated Access and Backhaul Node”; each application is assigned to the assignee. Technical Field

[0003] The following content generally relates to wireless communication, and more specifically to the channel sensing process for communication at integrated access and backhaul (IAB) nodes. Background Technology

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, SMS, and broadcasting. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems, such as Long Term Evolution (LTE), LTE-A, or LTE-A Pro systems, and fifth-generation (5G) systems (which may be referred to as New Radio (NR) systems). These systems can employ technologies such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication with multiple communication devices, which may also be referred to as User Equipment (UE). Summary of the Invention

[0005] The systems, methods, and apparatus disclosed herein are innovative in several aspects, but no single aspect is solely responsible for the desired properties disclosed herein.

[0006] One innovative aspect of the subject matter described in this disclosure can be implemented in a method for wireless communication at a wireless device. The method may include establishing a first wireless role and a second wireless role for the wireless device, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication; performing at least one of a first channel sensing process or a second channel sensing process at the wireless device, wherein the first channel sensing process is for the first wireless role and the second channel sensing process is for the second wireless role; initiating a Channel Occupancy Time (COT) at the wireless device for the first wireless role according to the first channel sensing process or for the second wireless role according to the second channel sensing process, or both; and transmitting via at least one of the first wireless role or the second wireless role during the COT.

[0007] Another innovative aspect of the subject matter described in this disclosure can be implemented in a wireless device apparatus for wireless communication. The wireless device apparatus may include a first interface, a second interface, and a processing system. The processing system may be configured to enable the wireless device apparatus to establish a first wireless role and a second wireless role, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. The processing system may be configured to perform at least one of a first channel sensing procedure or a second channel sensing procedure at the wireless device apparatus, wherein the first channel sensing procedure is for the first wireless role and the second channel sensing procedure is for the second wireless role. The processing system may be configured to initiate a Communication over Time (COT) at the wireless device apparatus for the first wireless role based on the first channel sensing procedure or for the second wireless role based on the second channel sensing procedure, or both. The first interface may be configured for transmission via at least one output signaling of the first wireless role or the second wireless role during the COT.

[0008] Another innovative aspect of the subject matter described in this disclosure can be implemented in another wireless device apparatus for wireless communication. The wireless device apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions, executable by the processor, cause the apparatus to establish a first wireless role and a second wireless role for the wireless device apparatus, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication; to perform at least one of a first channel sensing process or a second channel sensing process at the wireless device apparatus, wherein the first channel sensing process is for the first wireless role and the second channel sensing process is for the second wireless role; to initiate a Communication over Time (COT) at the wireless device apparatus for the first wireless role or for the second wireless role, or both, based on the first channel sensing process or based on the second channel sensing process; and to transmit via at least one of the first wireless role or the second wireless role during the COT.

[0009] Another innovative aspect of the subject matter described in this disclosure can be implemented in another wireless device apparatus for wireless communication. The wireless device apparatus may include components for establishing a first wireless role and a second wireless role for the wireless device apparatus, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication; performing at least one of a first channel sensing process or a second channel sensing process at the wireless device apparatus, wherein the first channel sensing process is for the first wireless role and the second channel sensing process is for the second wireless role; initiating a Communication over Time (COT) at the wireless device apparatus for the first wireless role based on the first channel sensing process or for the second wireless role based on the second channel sensing process, or both; and transmitting via at least one of the first wireless role or the second wireless role during the COT.

[0010] Another innovative aspect of the subject matter described in this disclosure can be implemented in a non-transitory computer-readable medium storing code for wireless communication at a wireless device. This code may include processor-executable instructions to establish a first wireless role and a second wireless role for the wireless device, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication; to perform at least one of a first channel sensing process or a second channel sensing process at the wireless device, wherein the first channel sensing process is for the first wireless role and the second channel sensing process is for the second wireless role; to initiate a Communication over Time (COT) at the wireless device for the first wireless role or for the second wireless role, or both, based on the first channel sensing process or based on the second channel sensing process; and to transmit via at least one of the first wireless role or the second wireless role during the COT.

[0011] One innovative aspect of the subject matter described in this disclosure can be implemented in a method for wireless communication at a wireless device. The method may include identifying a first value of a first channel sensing process associated with a first wireless role of the wireless device and a second value of a second channel sensing process associated with a second wireless role of the wireless device; determining whether at least one energy detection (ED) value associated with the channel satisfies at least one of the first value or the second value; and determining whether to initiate a COT for at least one of the first wireless role or the second wireless role based on whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value.

[0012] Another innovative aspect of the subject matter described in this disclosure can be implemented in a wireless device apparatus for wireless communication. The wireless device apparatus may include a first interface, a second interface, and a processing system. The processing system may be configured to identify a first value of a first channel sensing process associated with a first wireless role of the wireless device apparatus and a second value of a second channel sensing process associated with a second wireless role of the wireless device apparatus. The processing system may be configured to determine whether at least one ED value associated with the channel satisfies at least one of the first value or the second value. The processing system may be configured to determine whether to initiate a COT for at least one of the first wireless role or the second wireless role based on whether the determination of at least one ED value associated with the channel satisfies at least one of the first value or the second value.

[0013] Another innovative aspect of the subject matter described in this disclosure can be implemented in another wireless device apparatus for wireless communication. The wireless device apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. These instructions, executable by the processor, cause the apparatus to identify a first value of a first channel sensing process associated with a first wireless role of the wireless device apparatus and a second value of a second channel sensing process associated with a second wireless role of the wireless device apparatus, determine whether at least one ED value associated with the channel satisfies at least one of the first value or the second value, and, based on the determination that at least one ED value associated with the channel satisfies at least one of the first value or the second value, determine whether to initiate a COT for at least one of the first wireless role or the second wireless role.

[0014] Another innovative aspect of the subject matter described in this disclosure can be implemented in another wireless device apparatus for wireless communication. This wireless device apparatus may include components for identifying a first value of a first channel sensing process associated with a first wireless role of the wireless device apparatus and a second value of a second channel sensing process associated with a second wireless role of the wireless device apparatus, determining whether at least one ED value associated with the channel satisfies at least one of the first value or the second value, and determining whether to initiate a COT for at least one of the first wireless role or the second wireless role based on the determination that at least one ED value associated with the channel satisfies at least one of the first value or the second value.

[0015] Another innovative aspect of the subject matter described in this disclosure can be implemented in a non-transitory computer-readable medium storing code for wireless communication at a wireless device. This code may include processor-executable instructions to identify a first value of a first channel sensing process associated with a first wireless role of the wireless device and a second value of a second channel sensing process associated with a second wireless role of the wireless device, determine whether at least one ED value associated with the channel satisfies at least one of the first value or the second value, and, based on the determination that at least one ED value associated with the channel satisfies at least one of the first value or the second value, determine whether to initiate a COT for at least one of the first wireless role or the second wireless role.

[0016] Details of one or more embodiments of the subject matter described in this disclosure are set forth in the accompanying drawings and the following description. Other features, aspects, and advantages will become apparent from the specification, drawings, and claims. Note that the relative dimensions in the figures below may not be drawn to scale. Attached Figure Description

[0017] Figure 1 An example wireless communication system is shown that supports a channel sensing process for communication at integrated access and backhaul (IAB) nodes.

[0018] Figure 2 and Figure 3 An example IAB network is shown that supports a channel sensing process for communication at IAB nodes.

[0019] Figure 4 An example channel sensing configuration is shown that supports the channel sensing process for communication at IAB nodes.

[0020] Figure 5A and 5B An example communication timeline is shown that supports the channel sensing process for communication at IAB nodes.

[0021] Figure 6 An example alignment process is shown that supports the channel sensing process for communication at IAB nodes.

[0022] Figure 7 and Figure 8 An example process flow is shown that supports the channel sensing process for communication at IAB nodes.

[0023] Figure 9 A block diagram of an example device supporting a channel detection process for communication at an IAB node is shown.

[0024] Figure 10-18 A flowchart illustrating a method for supporting channel sensing procedures at IAB nodes is shown.

[0025] Similar reference numerals and names in the various figures denote similar elements. Detailed Implementation

[0026] The following description is directed to certain embodiments for the purpose of describing the innovative aspects of this disclosure. However, those skilled in the art will readily recognize that the teachings herein can be applied in many different ways. The described embodiments can be implemented according to any IEEE 16.11 standard or any IEEE 802.11 standard. Standard, Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Global System for Mobile Communications (GSM), GSM / General Packet Radio Service (GPRS), Enhanced Data GSM Environment (EDGE), Terrestrial Trunking Radio (TETRA), Wideband CDMA (W-CDMA), Evolved Data Optimized (EV-DO), 1xEV-DO, EV-DO Rev A, EV-DO Rev B, High-Speed ​​Packet Access (HSPA), High-Speed ​​Downlink Packet Access (HSDPA), High-Speed ​​Uplink Packet Access (HSUPA), Evolved High-Speed ​​Packet Access (HSPA+), Long Term Evolution (LTE), AMPS, or any other known signal used for communication within a wireless, cellular, or Internet of Things (IoT) network, such as systems utilizing 3G, 4G, or 5G, or further implementations of their technologies, for transmitting and receiving radio frequency (RF) signals.

[0027] In some wireless communication systems, an Integrated Access and Backhaul (IAB) node can communicate with one or more upstream devices, such as a parent IAB node or an IAB donor node, via a backhaul link, and with one or more downstream devices, such as child IAB nodes or user equipment (UEs), via an access link or a backhaul link. An IAB node can communicate with upstream devices using the Mobile Terminal (MT) role or function of the IAB node, and with downstream devices using the Distributed Unit (DU) role or function of the IAB node. In some examples, an IAB node can communicate on a shared spectrum, such as a shared channel, and can perform a channel sensing process to determine whether the channel is available for transmissions from the IAB node. For example, an IAB node can identify one or more transmissions from the IAB node (via the MT role or the DU role, or both), and can perform a channel sensing process before transmitting a transmission to avoid simultaneous transmission with another potentially interfering device.

[0028] In some implementations, the IAB node can perform separate channel sensing procedures for transmissions from the IAB node based on the radio role it can use to transmit transmissions. For example, the IAB node can perform a first channel sensing procedure to obtain channel access for a transmission scheduled via the IAB node's MT role, and can perform a second channel sensing procedure to obtain channel access for a transmission scheduled via the IAB node's DU role. The IAB node can select, configure, or otherwise determine a first timing for a first sensing slot used to perform the first channel sensing procedure and a second timing for a second sensing slot used to perform the second channel sensing procedure, based on one or more of the IAB node's capabilities and the timing of the transmission. For example, the IAB node can select, configure, or otherwise determine whether the first or second sensing slot can overlap temporally with another transmission from the IAB node, or can select, configure, or otherwise determine which transmission the first or second sensing slot, or both, can be aligned with (temporally). The IAB node can perform the first channel sensing procedure during the first sensing slot by measuring the energy of the shared channel and comparing the measured energy with a first energy detection (ED) threshold associated with the first channel sensing procedure. Similarly, the IAB node can perform a second channel sensing process during the second sensing time slot by measuring the energy of the shared channel and comparing the measured energy with a second ED threshold associated with the second channel sensing process. The IAB node can initiate a channel occupancy time (COT) for transmission via the MT role or DU role or both, depending on whether the measured energy meets (is less than or equal to) the first ED threshold or the second ED threshold or both.

[0029] Specific implementations of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages. For example, by supporting separate channel sensing procedures to initiate COT for transmissions via different radio roles of the IAB node, the IAB node can obtain channel access more reliably or more accurately. For example, in examples where the MT and DU roles of the IAB node use different antenna panels of the IAB node or otherwise have different RF footprints, if the IAB node uses a different channel sensing procedure for each of the MT and DU roles, the IAB node can more optimally align the RF footprints of the channel sensing procedures with the different RF footprints of the MT and DU roles. As a result of performing more reliable or more accurate channel sensing, transmissions from the IAB node are less likely to be adversely affected by interference from another transmitting device, which may increase the likelihood that a receiving device can successfully receive transmissions from the IAB node. Therefore, the IAB node can achieve higher data rates and greater spectral efficiency because the IAB node may potentially perform fewer retransmissions (due to the higher probability of successful communication).

[0030] The described techniques can also be implemented to provide configuration of separate channel sensing procedures based on one or more conditions at the IAB node. For example, a first ED threshold for a first channel sensing procedure and a second ED threshold for a second channel sensing procedure can be configured for the MT role and the DU role, respectively, and based on the sensing beams associated with the MT role and the DU role, respectively, based on the category of the MT role and the category of the DU role, respectively, or respectively, based on whether the IAB node transmits during the first sensing time slot or the second sensing time slot. Therefore, if the IAB node is configured to perform separate channel sensing procedures, the parent IAB node or the IAB donor node (the central unit (CU) of the IAB donor node) can have greater flexibility. Furthermore, if the IAB node uses ED thresholds configured based on conditions at the IAB node or otherwise determined, the separate channel sensing procedures can be more reliable or more accurate.

[0031] Figure 1 An example wireless communication system 100 supporting a channel sensing process for communication at an IAB node is illustrated. Wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0032] Base stations 105 can be distributed across a geographical area to form a wireless communication system 100, and can be different types of devices or devices with different capabilities. Base stations 105 and UE 115 can communicate wirelessly via one or more communication links 125. Each base station 105 can provide a geographical coverage area 110, and UE 115 and base station 105 can establish one or more communication links 125 on the coverage area 110. The geographical coverage area 110 can be an example of a geographical area over which base stations 105 and UE 115 can support signal communication according to one or more radio access technologies.

[0033] UE 115 can be distributed throughout the geographical coverage area 110 of wireless communication system 100, and each UE 115 can be stationary or mobile, or stationary or mobile at different times. UE 115 can be different types of devices or devices with different capabilities. Figure 1 Some example UE 115s are shown in the figure. Figure 1As shown, the UE 115 described herein can communicate with various types of devices, such as other UE 115s, base station 105, or network devices (e.g., core network nodes, relay devices, IAB nodes, or other network devices).

[0034] Base station 105 may communicate with core network 130 or with each other, or both. For example, base station 105 may engage with core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or another interface). Base station 105 may communicate with each other directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) or both via backhaul links 120 (e.g., via X2, Xn, or another interface). In some examples, backhaul link 120 may be or include one or more radio links.

[0035] One or more of the base stations 105 described herein may include, or may be referred to by those skilled in the art as, base station, radio base station, access point, radio transceiver, NodeB, eNodeB (eNB), next-generation NodeB or giga-NodeB (any of which may be referred to as gNB), home NodeB, home eNodeB, or other suitable terms.

[0036] UE 115 may include or be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, wherein in other examples, "device" may also be referred to as a unit, station, terminal, or client. UE 115 may also include or be referred to as a personal electronic device such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine-type communication (MTC) device, which may be implemented in various objects such as home appliances, vehicles, and meters.

[0037] like Figure 1 As shown, the UE 115 described herein may be able to communicate with various types of devices, such as other UE 115s that may sometimes act as relays, as well as base station 105 and network devices including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations.

[0038] UE 115 and base station 105 can wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term "carrier" can refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion of the radio frequency spectrum band (e.g., a bandwidth portion (BWP)) according to one or more physical layer channels operating for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling coordinating carrier operation, user data, or other signaling. Wireless communication system 100 can support communication with UE 115 using carrier aggregation or multi-carrier operation. UE 115 can be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation can be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0039] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications Terrestrial Radio Access (E-UTRA) Absolute Radio Channel Number (EARFCN)) and may be located based on a channel grid used for discovery by UE 115. A carrier may operate in an independent mode where initial acquisition and connection can be performed by UE 115 via the carrier, or in a non-independent mode where different carriers anchored (e.g., the same or different radio access technologies) may be connected.

[0040] The communication link 125 shown in the wireless communication system 100 may include uplink transmission from UE 115 to base station 105, or downlink transmission from base station 105 to UE 115. A carrier may carry either downlink or uplink (e.g., in FDD mode), or may be configured to carry both downlink and uplink communication (e.g., in TDD mode).

[0041] A carrier may be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth may be one of several defined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz) of a carrier for a particular radio access technology. Devices of the wireless communication system 100 (e.g., base station 105, UE 115, or both) may have a hardware configuration that supports communication over a specific carrier bandwidth or may be configurable to support communication over a single carrier bandwidth within a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate over a portion (e.g., a sub-band, BWP) or the entire carrier bandwidth.

[0042] The signal waveform transmitted via a carrier can consist of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform extended OFDM (DFT-S-OFDM)). In a system employing MCM, a resource element can include a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme, the encoding / decoding rate of the modulation scheme, or both). Therefore, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate the UE 115 can achieve. Wireless communication resources can refer to a combination of radio spectrum resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers can further improve the data rate or data integrity used for communication with the UE 115.

[0043] One or more parameter sets can be supported for a carrier, where the parameter set may include subcarrier spacing (Δf) and cyclic prefix. A carrier can be divided into one or more BWPs with the same or different parameter sets. In some examples, UE 115 can be configured with multiple BWPs. In some examples, a single BWP for a carrier can be active at a given time, and communication for UE 115 can be restricted to one or more active BWPs.

[0044] The time interval of base station 105 or UE 115 can be expressed as a multiple of a basic time unit, such as T. s =1 / (Δf) max ·N f The sampling period is ) seconds, where Δf maxThis can represent the maximum supported subcarrier spacing, and N f This can represent the maximum supported Discrete Fourier Transform (DFT) size. The time interval of the communication resources can be organized according to each radio frame having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

[0045] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into multiple time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include multiple symbol periods (e.g., depending on the length of the cyclic prefix preceding each symbol period). In some wireless communication systems 100, time slots may be further divided into multiple micro-time slots containing one or more periods. In addition to the cyclic prefix, each symbol period may contain one or more (e.g., N) f Sampling period. The duration of the symbol period can depend on the subcarrier spacing or frequency band of the operation.

[0046] A subframe, time slot, smaller time slot, or symbol can be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol cycles in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs)).

[0047] Physical channels can be multiplexed on carriers using various techniques. Physical control channels and physical data channels can be multiplexed on downlink carriers, for example, using one or more of Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), or hybrid TDM-FDM techniques. The control region (e.g., control resource set (CORESET)) of a physical control channel can be defined by multiple symbol periods and can extend across the system bandwidth or a subset of the system bandwidth of a carrier. One or more control regions (e.g., CORESET) can be configured for a set of UEs 115. For example, one or more UEs 115 can monitor or search control regions to obtain control information based on one or more search space sets, and each search space set can include one or more control channel candidates from one or more aggregation levels arranged in a cascaded manner. The aggregation level of control channel candidates can refer to multiple control channel resources (e.g., control channel elements (CCEs)) associated with coded information in a control information format having a given payload size. The search space set can include a common search space set configured to send control information to multiple UEs 115 and a UE-specific search space set for sending control information to a specific UE 115.

[0048] Each base station 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hotspots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with base station 105 (e.g., via a carrier) and may be associated with an identifier used to distinguish neighboring cells (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area 110 or a portion of geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. The extent of such cells may vary from small areas (e.g., structures, subsets of structures) to large areas depending on various factors such as the capabilities of base station 105. For example, a cell may be or include buildings, subsets of buildings, or external space between or overlapping geographic coverage areas 110.

[0049] Macro cells typically cover a relatively large geographical area (e.g., a radius of several kilometers) and can allow unrestricted access for UE 115 with a service subscription to a network provider supporting the macro cell. In contrast, small cells can be associated with a lower-power base station 105 and can operate in the same or different (e.g., licensed or unlicensed) frequency bands as macro cells. Small cells can provide unrestricted access to UE 115 with a service subscription to a network provider, or restricted access to UE 115 associated with a small cell (e.g., UE 115 in a Closed Subscriber Group (CSG), or UE 115 associated with a user in a home or office). Base station 105 can support one or more cells and can also support communication on one or more cells using one or more component carriers.

[0050] In some examples, a carrier can support multiple cells and can be configured with different cells based on different protocol types that can provide access to different types of devices (e.g., MTC, Narrowband IoT (NB-IoT), Enhanced Mobile Broadband (eMBB)).

[0051] In some examples, base station 105 may be mobile, and thus provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. Wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 use the same or different radio access technologies to provide coverage for various geographic coverage areas 110.

[0052] The wireless communication system 100 can support synchronous or asynchronous operation. For synchronous operation, base stations 105 can have similar frame timing, and transmissions from different base stations 105 can be approximately time-aligned. For asynchronous operation, base stations 105 can have different frame timing, and in some examples, transmissions from different base stations 105 may not be time-aligned. The techniques described herein can be used for both synchronous and asynchronous operation.

[0053] Some UE 115s, such as MTC or IoT devices, can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with base station 105 without human intervention. In some examples, M2M communication or MTC can include communication from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application that utilizes or presents the information to people interacting with the application. Some UE 115s can be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, train management and tracking, remote security sensing, physical access control, and transaction-based service charging.

[0054] Some UE 115s can be configured to operate in a power-saving mode, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception, but not simultaneous transmission and reception). In some examples, half-duplex communication can be performed at a reduced peak rate. Other power-saving techniques for UE 115s include entering a power-saving deep sleep mode when not participating in active communication, operating on limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UE 115s can be configured to operate using a narrowband protocol type associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a carrier's guard band, or outside the carrier.

[0055] Wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE 115 may be designed to support ultra-reliable, low-latency, or mission-critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private or group communication and may be supported by one or more mission-critical services, such as Mission-Critical Talk-to-Talk (MCPTT), Mission-Critical Video (MCVideo), or Mission-Critical Data (MCData). Support for mission-critical functions may include service prioritization, and mission-critical services may be used for public safety or general business applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency are used interchangeably herein.

[0056] In some examples, UE 115 can also communicate directly with other UE 115 via device-to-device (D2D) communication link 135 (e.g., using peer-to-peer (P2P) or D2D protocols). One or more UE 115s utilizing D2D communication can be within the geographic coverage area 110 of base station 105. Other UE 115s in such a group may be outside the geographic coverage area 110 of base station 105 or unable to receive transmissions from base station 105. In some examples, a group of UE 115s communicating via D2D communication can utilize a one-to-many (1:M) system, in which each UE 115 sends to every other UE 115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In some other examples, D2D communication is performed between UE 115s without involving base station 105.

[0057] In some systems, the D2D communication link 135 may be an example of a communication channel between vehicles (e.g., UE 115), such as a sidechain communication channel. In some examples, vehicles may communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. Vehicles may signal information related to traffic conditions, signaling, weather, safety, emergencies, or any other information related to the V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure (such as roadside units) or with the network, or both, via vehicle-to-network (V2N) communication through one or more network nodes (e.g., base station 105).

[0058] Core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 can be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), access and mobility management function (AMF)) managing access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), packet data network (PDN) gateway (P-GW), or user plane function (UPF)) routing packets or interconnects to external networks. The control plane entity can manage non-access stratum (NAS) functions of UE 115 served by base station 105 associated with core network 130, such as mobility, authentication, and bearer management. User IP packets can be transmitted through the user plane entity, which can provide IP address allocation and other functions. The user plane entity can connect to network operator IP service 150. Operator IP service 150 may include access to the Internet, intranet(s), IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0059] Some network devices (such as base station 105) may include sub-components such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with UE 115 through one or more other access network transport entities 145, which may be referred to as a radio head, smart radio head, or transmit / receive point (TRP). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or combined into a single network device (e.g., base station 105).

[0060] Wireless communication system 100 can operate using one or more frequency bands typically in the range of 300 MHz to 300 GHz. The region from 300 MHz to 3 GHz is generally referred to as the Ultra High Frequency (UHF) region or decimeter band because the wavelength range is from approximately 1 decimeter to 1 meter. UHF waves may be blocked or have their direction altered by buildings and environmental features, but these waves can penetrate structures sufficiently to provide service to the UE 115 located indoors via a macrocell. Compared to transmissions using smaller frequencies and longer waves in the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum with frequencies less than 300 MHz, UHF wave transmission can be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0061] The wireless communication system 100 can also operate in the ultra-high frequency (SHF) region (also known as the centimeter band) using the frequency band from 3 GHz to 30 GHz, or in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also known as the millimeter band). In some examples, the wireless communication system 100 can support millimeter-wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices can be smaller and more closely spaced than UHF antennas. In some examples, this can facilitate the use of an in-device antenna array. However, compared to SHF or UHF transmissions, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and a shorter range. Transmissions using one or more different frequency regions can employ the techniques disclosed herein, and the designated use of frequency bands across these frequency regions can vary by country or regulatory body.

[0062] Wireless communication system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, wireless communication system 100 can employ Licensed Assisted Access (LAA), LTE Unlicensed (LTE-U) radio access technology, or NR technology in unlicensed bands such as the 5 GHz Industrial, Scientific, and Medical (ISM) band. When operating in unlicensed radio frequency spectrum bands, devices such as base station 105 and UE 115 can employ carrier sensing for collision detection and avoidance. In some examples, operation in unlicensed bands can be configured based on carrier aggregation and component carriers operating in licensed bands (e.g., LAA). Operation in unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, etc.

[0063] Base station 105 or UE 115 may be equipped with multiple antennas that can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be located together at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with base station 105 may be located in various geographical locations. Base station 105 may have an antenna array with multiple rows and columns of antenna ports that base station 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0064] Base station 105 or UE 115 can use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. This technique can be referred to as spatial multiplexing. For example, multiple signals can be sent by a transmitting device via different antennas or different combinations of antennas. Similarly, multiple signals can be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals can be referred to as a separate spatial stream and can carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers can be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) and multi-user MIMO (MU-MIMO), where in single-user MIMO, multiple spatial layers are sent to the same receiving device, and in multi-user MIMO, multiple spatial layers are sent to multiple devices.

[0065] Beamforming, also known as spatial filtering, directional transmission, or directional reception, is a signal processing technique used at a transmitting or receiving device (e.g., base station 105, UE 115) to shape or guide antenna beams (e.g., transmit beam, receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be implemented by combining signals communicated via antenna elements of an antenna array such that some signals propagating in a particular direction relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to the signals communicated via the antenna elements may include the transmitting or receiving device applying amplitude offset, phase offset, or both to the signals carried by the antenna elements associated with that device. The adjustments associated with each antenna element may be defined by a beamforming weight set associated with a particular direction (e.g., relative to the antenna array of the transmitting or receiving device, or relative to some other direction).

[0066] Base station 105 or UE 115 may use beam scanning technology as part of beamforming operations. For example, base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by base station 105 in different directions. For example, base station 105 may transmit signals according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by a transmitting device such as base station 105 or by a receiving device such as UE 115) to identify the beam direction for later transmission or reception by base station 105.

[0067] Some signals, such as data signals associated with a specific receiving device, may be transmitted by base station 105 in a single beam direction (e.g., the direction associated with a receiving device such as UE 115). In some examples, the beam direction associated with transmission along a single beam direction can be determined based on the signals transmitted in one or more beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication of signals received by UE 115 with the highest signal quality or other acceptable signal quality.

[0068] In some examples, transmissions via a device (e.g., by base station 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from base station 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and this feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 may transmit reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)), which may be pre-coded or uncoded. UE 115 may provide feedback for beam selection, which may be a pre-coded matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel codebook, linear combination codebook, port selection codebook). Although these techniques are described with reference to the signals transmitted by the base station 105 in one or more directions, the UE 115 may employ similar techniques to transmit signals multiple times in different directions (e.g., to identify the beam direction for subsequent transmission or reception by the UE 115), or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0069] A receiving device (e.g., UE 115) may attempt multiple receiving configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiving device may attempt multiple receiving directions by: receiving via different antenna subarrays; processing the received signal according to different antenna subarrays; receiving according to different sets of receiving beamforming weights applied to signals received at multiple antenna elements of the antenna array (e.g., different directional listening weight sets); or processing the received signal according to different sets of receiving beamforming weights applied to signals received at multiple antenna elements of the antenna array, any of which can be referred to as "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving data signals). The single receiving configuration may be aligned in a beam direction determined by listening according to different receiving configuration directions (e.g., due to a beam direction with the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality determined by listening according to multiple beam directions).

[0070] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer can be IP-based. The Radio Link Control (RLC) layer can perform packet segmentation and reassembly for communication on logical channels. The Media Access Control (MAC) layer can perform priority processing and multiplex logical channels into transport channels. The MAC layer can also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide the establishment, configuration, and maintenance of RRC connections between the UE 115 and the base station 105 or core network 130 that supports user plane data radio bearers. At the physical layer, transport channels can be mapped to physical channels.

[0071] UE 115 and base station 105 can support data retransmission to increase the likelihood of successful data reception. Hybrid Automatic Repeat Request (HARQ) feedback is a technique used to increase the likelihood of correct data reception over communication link 125. HARQ can include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve MAC layer throughput under harsh radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, the device can support same-slot HARQ feedback, where the device can provide HARQ feedback in a specific time slot for data received in a previous period within that time slot. In some other examples, the device can provide HARQ feedback in subsequent time slots or according to some other time interval.

[0072] The wireless communication system 100 can be an NR system, which can utilize any combination of licensed, shared, and unlicensed spectrum bands. In some examples, NR unlicensed (NR-U) or shared spectrum can increase spectrum utilization and efficiency due to resource sharing between devices within the wireless communication system 100. To transmit on shared spectrum, devices can perform a channel sensing process to determine whether a channel (such as a shared spectrum channel) is currently being used by another potentially interfering device.

[0073] In some implementations, the wireless communication system 100 may support separate channel sensing procedures at IAB nodes with multiple wireless roles. For example, an IAB node may establish an MT role or function for upstream communication (e.g., communication on wireless backhaul link 120) and a DU role or function for downstream communication (e.g., communication on a wireless access link (such as communication link 125) or wireless backhaul link 120), and may perform a first channel sensing procedure to obtain channel access for transmissions via the MT role, and perform a second channel sensing procedure to obtain channel access for transmissions via the DU role. The IAB node may select, configure, or otherwise determine the timing of a first sensing slot for performing the first channel sensing procedure or the timing of a second sensing slot for performing the second channel sensing procedure based on the transmission timing of the transmissions via the MT role or based on the transmission timing of the transmissions via the DU role, or both.

[0074] An IAB node can perform a first channel sensing process by measuring the energy of the channel (shared channel) during a first sensing time slot and comparing the measured energy (here referred to as the ED value) with a first ED threshold of the first channel sensing process. The IAB node can initiate a COT (or select, configure, or determine whether to initiate a COT) for transmissions via the MT role based on whether the measured energy meets (is less than or equal to) the first ED threshold, the timing of transmissions via the MT role and the timing of transmissions via the DU role, the IAB node's duplex capability, or any combination thereof. Similarly, an IAB node can perform a second channel sensing process by measuring the energy of the channel (which may be the same channel or a different channel sensed by the first channel sensing process) during a second sensing time slot and comparing the measured energy with a second ED threshold of the second channel sensing process. The IAB node can initiate a COT (or select, configure, or determine whether to initiate a COT) for transmissions via the DU role based on whether the measured energy meets (is less than or equal to) the second ED threshold, the timing of transmissions via the MT role and the timing of transmissions via the DU role, the IAB node's duplex capability, or any combination thereof.

[0075] Figure 2 An example IAB network 200 is shown that supports channel sensing processes for communication at IAB nodes. In some examples, IAB network 200 may implement aspects of wireless communication system 100. IAB network 200 may be a 5G NR system, such as a mmW system, and may provide an IAB network architecture by supplementing wired backhaul connections (such as wired backhaul link 220) among devices that support wireless backhaul capabilities.

[0076] For example, IAB network 200 illustrates an IAB network architecture including a core network 205, an IAB donor node 210, multiple IAB nodes 215 (which may be examples of IAB relay nodes), and multiple UEs 115. IAB network 200 can support coverage of access networks and backhaul networks between access nodes, enabling communication between UEs 115 and the core network 205 via one or more wireless or wired links. Such access networks may include communication between access nodes such as IAB donor node 210 or IAB node 215 and UEs 115, and such backhaul networks may include communication between different access nodes. In some examples, communication toward UEs 115 may be referred to as downstream communication, and communication toward the core network 205 may be referred to as upstream communication.

[0077] IAB network 200 may include one or more IAB donor nodes 210, which can serve as an interface between wired and wireless networks. For example, IAB donor node 210 may include at least one wired backhaul link 220 through which IAB donor node 210 can communicate with core network 205, and one or more wireless links, such as wireless backhaul link 225 or access link 235, through which IAB donor node 210 can communicate with UE 115 or IAB node 215 (e.g., a child node). In some aspects, IAB donor node 210 may be referred to as an anchor node due to the wired backhaul link 220 between IAB donor node 210 and core network 205. IAB donor node 210 may be divided into two wireless roles or otherwise act as two wireless roles or as two entities. For example, IAB donor node 210 may be divided into a CU role and a DU role or otherwise act as a CU role and a DU role, wherein the DU associated with IAB donor node 210 may be at least partially controlled by the associated CU of IAB donor node 210. In some respects, the CU role and DU role of IAB donor node 210 may be different entities. In other respects, the CU role and DU role of IAB donor node 210 may be included within the same entity, but may function as two different entities (e.g., if communicating via the CU role, IAB donor node 210 may use different software than if communicating via the DU role).

[0078] The CU of IAB donor node 210 can support Layer 3 (L3) functions and signaling, such as RRC or PDCP layer functions, and in some examples, IAB donor node 210 can control the IAB network via configuration signaling through the CU role. The DU of IAB donor node 210 can maintain lower layer operation, such as Layer 1 (L1) or Layer 2 (L2) functions and signaling. For example, the DU of IAB donor node 210 can hold RLC, MAC, or physical layer functions. In some examples, IAB donor node 210 can control both access link 235 and radio backhaul link 225 within the IAB network coverage area through the DU role, and can provide control and scheduling information to downlink (e.g., sub) IAB node 215 or UE 115 or both. For example, IAB donor node 210 can support RLC channel connections with UE 115 (via access link 235) or with IAB node 215 (via radio backhaul link 225) through the DU role.

[0079] IAB node 215 can also be divided into two radio roles or otherwise act as two radio roles or as two entities. For example, IAB node 215 can be divided into or otherwise act as a Mobile Terminal (MT) role and a Dual Operator (DU) role, wherein the MT role of IAB node 215 can be at least partially controlled or scheduled by a parent node such as parent IAB node 215 or parent node of IAB donor node 210. In some aspects, the MT role and DU role of IAB node 215 can be different entities. In some other aspects, the MT role and DU role of IAB node 215 can be included within the same entity, but can functionally operate as two different entities (e.g., if communicating via the MT role, IAB node 215 can use different software than if communicating via the DU role). In some examples, the MT role of IAB node 215 can be similar to the role performed by UE 115 within IAB network 200. Additionally, in some examples, IAB node 215 may not be directly connected to wired backhaul link 220. Conversely, IAB node 215 can connect to the core network 205 via wireless backhaul link 225 through other IAB nodes 215 (any number of additional IAB nodes 215 and IAB donor nodes 210). Therefore, in the example where IAB node 215 is used as a relay node, IAB node 215 can relay traffic to or from IAB donor node 210 via one or more hops, where the number of hops can refer to the number of wireless backhaul links 225 connecting IAB node 215 to IAB donor node 210.

[0080] The DU role of IAB node 215 can be controlled at least in part by signaling messages from the CU role of IAB donor node 210 (e.g., associated IAB donor node 210). In some examples, such signaling messages can be sent from IAB donor node 210 to IAB node 215 via F1 Application Protocol (F1-AP) messages. Additionally, the DU role of IAB node 215 can support geographic coverage area 110-a of the IAB network coverage area and can provide scheduling information to UE 115 and sub-IAB nodes 215 within geographic coverage area 110-a. For example, the DU role of IAB node 215 can perform the same or similar functions as the DU role of IAB donor node 210 by controlling or scheduling communication on access link 235 between IAB node 215 and UE 115 within geographic coverage area 110-a, and on radio backhaul link 225 between IAB node 215 and downstream IAB nodes 215 within geographic coverage area 110-a. As described herein, IAB node 215 can use the MT role of IAB node 215 to conduct upstream communication in IAB network 200 (towards core network 205), and can use the DU role of IAB node 215 to conduct downstream communication in IAB network 200 (towards UE 115).

[0081] In some examples, IAB network 200 may be an NR-U system, and IAB node 215 may utilize shared or unlicensed spectrum to communicate with IAB donor node 210, one or more other IAB nodes 215 (e.g., parent or child IAB nodes 215), one or more UEs 115, or any combination thereof. Therefore, IAB node 215 may share time and frequency resources with other devices within IAB network 200. As a result of utilizing NR shared spectrum, IAB node 215 may support increased spectrum utilization and efficiency, particularly through dynamic vertical (e.g., across frequency domains) and horizontal (e.g., across time domains) sharing of resources. However, in some examples, if multiple devices attempt to transmit simultaneously on the shared spectrum, the shared spectrum may become congested, potentially leading to high levels of interference and reducing the likelihood of successful communication between devices within IAB network 200. For example, if IAB node 215 attempts to transmit simultaneously with another device, the transmission from IAB node 215 may be adversely affected by interference generated by the other device, which may reduce the likelihood that the receiving device will successfully receive the transmission from IAB node 215.

[0082] To reduce the impact of interference from other devices using the shared spectrum, IAB node 215 may perform a channel sensing process before transmission to discover or determine whether the shared channel is idle (available). However, some channel sensing processes may be suboptimal for devices characterized by different radio roles or otherwise operating. For example, IAB node 215 may act as an MT role or a DU role or both at any given time, and different radio roles may use different communication components of IAB node 215 or different communication parameters that may affect the reliability and accuracy of the channel sensing process. For example, depending on various design or implementation choices, the MT role and DU role of IAB node 215 may share the antenna panel of IAB node 215, use different antenna panels of IAB node 215, use different transmission powers (e.g., different maximum transmission powers), use different transmit and receive beam sets, have different RF footprints, share the same ED threshold, use different ED thresholds, or any combination thereof. In one example, the MT and DU roles of IAB node 215 can each use different transmit and receive beamsets because the DU role of IAB node 215 can serve a wider geographic area than the MT role. This is likely because the DU role of IAB node 215 can serve a relatively large number of UEs 115 or child IAB nodes 215 at various locations within geographic coverage area 110-a, while the MT role of IAB node 215 can communicate with a relatively small number of candidate parent IAB nodes 215 with known locations or orientations. Additionally or alternatively, different IAB nodes 215 can have different duplex capabilities, which can affect the timing of the channel sensing process.

[0083] In some implementations, IAB node 215 may consider this potential variation as a result of communication capabilities and configuration signaling between IAB node 215 and its parent IAB node 215 or IAB donor node 210 (e.g., the CU role of IAB donor node 210). For example, IAB node 215 may report one or more capabilities to its parent IAB node 215 or the CU role of IAB donor node 210, which may include sensing capabilities or duplex capabilities, or both.

[0084] In some examples, the sensing capability of IAB node 215 can indicate whether IAB node 215 can perform a channel sensing process as a single node or as multiple nodes. For example, IAB node 215 can operate as a single entity in both the MT and DU roles (e.g., the MT and DU roles can share the antenna panel of IAB node 215), and IAB node 215 can include an indication within its sensing capability that IAB node 215 can perform a channel sensing process as a single node. Performing a channel sensing process as a single node may be referred to herein as a common channel sensing process. Alternatively, IAB node 215 can operate as a first entity in the MT role and as a second entity in the DU role (e.g., the MT and DU roles of IAB node 215 can use different antenna panels of IAB node 215), and IAB node 215 can include an indication within its sensing capability that IAB node 215 can perform a channel sensing process as multiple nodes. Performing a channel sensing process as multiple nodes may be referred to herein as performing separate channel sensing processes for the MT and DU roles.

[0085] In some implementations, IAB node 215 may perform separate channel sensing procedures for the MT role and the DU role. This use of separate channel sensing procedures for transmissions via the MT role and the DU role via the IAB node 215 can result in greater reliability, for example in instances where the MT role and DU role of the IAB node use separate antenna panels or otherwise have different RF footprints—for example, in instances where the MT role and DU role of the IAB node 215 have sufficiently different RF footprints (beyond threshold variations).

[0086] The RF footprints associated with the MT and DU roles of IAB node 215 can correspond to areas or volumes where interference to the receiver may be large enough to result in a high error rate or a low probability of successful communication. IAB node 215 can determine the RF footprints associated with the MT and DU roles based on transmit beam pattern, transmit power, ED threshold, or any combination thereof. Therefore, in examples where the MT and DU roles have different RF footprints, the MT and DU roles may use different transmit beam patterns and / or different transmit powers, or transmissions via the MT and DU roles may have different interference susceptibility (e.g., different ED thresholds may be used for transmissions via the MT role versus transmissions via the DU role).

[0087] In such examples where the MT and DU roles have different radio footprints, the IAB node 215 can perform different channel sensing procedures for each radio role, allowing the two different channel sensing procedures to achieve better alignment with the two different radio footprints of the MT and DU roles than a single channel sensing procedure could achieve. For example, the MT role can be associated with a first radio footprint, and the DU role can be associated with a second radio footprint, and the first channel sensing procedure can be configured to align with the first radio footprint of the MT role, while the second channel sensing procedure can be configured to align with the second radio footprint of the DU role. The area or volume of the radio footprint associated with the channel sensing procedure can be determined using or based on the received beam pattern, maximum transmit power, ED threshold, or any combination thereof.

[0088] Therefore, IAB node 215 can align the RF footprint associated with one of the channel sensing processes with the RF footprint associated with one of the wireless roles of IAB node 215, either as a result of performing the channel sensing process using the same or similar beam pattern used by the wireless role for transmission, or as a result of adjusting the transmit power or ED threshold, or both, in an example using a different beam pattern. Thus, IAB node 215 can minimize or avoid exposed node problems where an area or volume may be covered by the RF footprint of the channel sensing process but not by the RF footprint of transmission via the MT role or DU role, which may lead to unnecessary transmission congestion, and hidden node problems where an area or volume may be covered by the RF footprint of transmission via the MT role or DU role but not by the RF footprint of the channel sensing process, which may lead to high levels of interference from nodes within the area or volume, potentially reducing the likelihood of successful transmission from IAB node 215.

[0089] Additionally or alternatively, the sensing capability of IAB node 215 may indicate whether IAB node 215 is capable of performing a simultaneous channel sensing process. In other words, the sensing capability of IAB node 215 may indicate whether IAB node 215 is capable of simultaneously sensing one or more channels from multiple entities of IAB node 215. For example, the sensing capability may indicate whether IAB node 215 is capable of performing a first channel sensing process simultaneously with a second channel sensing process. Additionally or alternatively, the sensing capability of IAB node 215 may indicate whether IAB node 215 is capable of performing a channel sensing process for a radio role while transmitting via another radio role. For example, within the sensing capability, IAB node 215 may include an indication of whether IAB node 215 is capable of performing a first channel sensing process for a transmission via an MT role while simultaneously transmitting via a DU role, or whether it is capable of performing a second channel sensing process for a transmission via a DU role while simultaneously transmitting via an MT role. Additionally or alternatively, the sensing capability may include an indication of whether IAB node 215 is capable of shifting the timing of a sensing time slot by a gap to offset the sensing time slot from the corresponding transmission.

[0090] In some implementations, IAB node 215 may send sensing capabilities to the CU role of its parent IAB node 215 or IAB donor node 210 in a message notified via the F1-AP interface, via the RRC interface, via MAC-CE, or any combination thereof. For example, IAB node 215 may send or otherwise output its sensing capabilities as one or more of an F1-AP message, an RRC message, or a MAC-CE. IAB node 215 may additionally or alternatively send duplex capabilities to the CU role of its parent IAB node 215 or IAB donor node 210 to indicate whether IAB node 215 is capable of TDM upstream and downstream communication, simultaneous spatial division multiplexing (SDM) reception, simultaneous SDM transmission, or full-duplex communication. For example, refer to... Figure 3 This document describes example duplex capabilities of IAB node 215 in more detail. In some examples, the duplex capability of IAB node 215 can affect the timing of sensing slots used to perform channel sensing procedures. IAB node 215 may transmit duplex capability to the CU role of parent IAB node 215 or IAB donor node 210, either together with or separately from the transmission of sensing capability, and in some implementations, the duplex capability may be transmitted or otherwise output as one or more of F1-AP messages, RRC messages, or MAC-CE messages.

[0091] Parent IAB node 215 or IAB donor node 210 may receive sensing capability or duplex capability, or both, and may select or otherwise determine the configuration of the channel sensing procedure of IAB node 215 based on the sensing capability or duplex capability, or both. In some examples, the configuration of the channel sensing procedure may indicate the type of channel sensing procedure that IAB node 215 can use. For example, IAB node 215 may perform a type 1 channel sensing procedure, a type 2A channel sensing procedure, or a type 2B channel sensing procedure. For example, refer to... Figure 4 Additional details related to the type of channel sensing procedure are described herein. Furthermore, the configuration of the channel sensing procedure can instruct IAB node 215 whether to perform a common channel sensing procedure for transmissions via the MT role and the DU role, or whether IAB node 215 will perform separate channel sensing procedures for transmissions via the MT role and the DU role. In some embodiments, the configuration can instruct IAB node 215 to perform separate channel sensing procedures for transmissions via the MT role and for transmissions via the DU role.

[0092] The configuration of the channel sensing process may also include information related to the timing of the sensing slots used to perform the channel sensing process (e.g., timing information for individual sensing slots used to perform individual channel sensing processes). For example, referring to Figure 5, additional details related to the timing of individual channel sensing processes are described herein. Alternatively or additionally, the configuration of the channel sensing process may indicate whether IAB node 215 can use a padding signal to align the transmission timing of a transmission via the MT role with the transmission timing of a transmission via the DU role. For example, in an example where IAB node 215 is capable of transmitting simultaneously via both the MT and DU roles and where the transmissions via the MT and DU roles are not time-aligned (e.g., offset by a time slot), the configuration of the channel sensing process may instruct IAB node 215 to apply a padding signal to time-align the transmissions via the MT and DU roles. For example, referring to... Figure 6 This paper describes additional details related to the application of padding signals to time-align different transmissions via the MT and DU roles.

[0093] In some examples, the configuration of the channel sensing procedure for IAB node 215 can be pre-configured or predefined based on the capabilities of IAB node 215, such as in the specification. Additionally or alternatively, parent IAB node 215 or IAB donor node 210 can send instructions to IAB node 215 regarding the configuration of the channel sensing procedure. For example, in an example where parent IAB node 215 configures the channel sensing procedure for IAB node 215, parent IAB node 215 can send the instructions via MAC-CE or via DCI. In an example where IAB donor node 210 configures the channel sensing procedure for IAB node 215 via the CU role of IAB donor node 210, IAB donor node 210 can send the instructions via the F1-AP interface (via F1-AP messages) or via the RRC interface (via RRC messages).

[0094] In some implementations, the configuration of the channel sensing process can be received via the ChannelAccessConfig-r16 field, which is an RRC field or an RRC information element that includes a list of parameters for sharing the spectrum channel sensing process. For example, the ChannelAccessConfig-r16 field may include a maxEnergyDetectionThreshold-r16 parameter indicating the maximum ED threshold, an energyDetectionThresholdOffset-r16 parameter indicating the offset relative to a default ED threshold (such as the default maximum ED threshold), an ul–toDL-COT-SharingED-Threshold-r16 parameter indicating the maximum ED threshold that IAB node 215 can use to share COT with IAB donor node 210 or parent IAB node 215, and an absenceOfAnyOtherTechnology-r16 parameter indicating the potential presence or absence of any other technology for sharing the carrier used by IAB node 215. At the base station 105 side or the DU role of IAB node 215, the upper limit of the ED threshold can be determined using a formula defined by the specification, and the maximum ED threshold can be a function of maximum transmission power, bandwidth, the presence of other techniques for sharing the channel, or any combination thereof. At the UE 115 side or the MT role of IAB node 215, the upper limit of the ED threshold can be configured as an absolute value via maxEnergyDetectionThreshold-r16, or as an offset value via energyDetectionThresholdOffset-r16. In examples where no upper limit of the ED threshold is configured, the MT role of UE 115 or IAB node 215 can determine the upper limit of the ED threshold using a formula similar to that used at the base station 105 side or the DU role of IAB node 215.

[0095] In some examples, IAB node 215 may receive or configure an ED threshold for the channel sensing process, which may also be referred to herein as the value of the channel sensing process or the ED threshold. For example, the CU role of IAB donor node 210 may configure the ED threshold via the F1-AP interface (via F1-AP messages) or via the RRC interface (via RRC messages), or parent IAB node 215 may indicate the ED threshold to IAB node 215 via MAC-CE or DCI. In some examples, IAB node 215 may receive an indication of the ED threshold via one of the parameters in the ChannelAccessConfig-r16 field. In some implementations, signaling from IAB donor node 210 or parent IAB node 215 may indicate a first ED threshold that IAB node 215 can use to perform a first channel sensing process and a second ED threshold that IAB node 215 can use to perform a second channel sensing process. Additionally or alternatively, the configured or indicated ED threshold may be associated with a set of sense beams or a set of beam pairs (e.g., a unique set of sense beams and transmit beam pairs), and the IAB node 215 may use the ED threshold when performing a channel sensing procedure using the associated set of sense beams or the associated set of beam pairs. For example, a first ED threshold may be associated with a first set of sense beams, and a second ED threshold may be associated with a second set of sense beams. In such an example, if a first channel sensing procedure uses the first set of sense beams, the IAB node 215 may use the first ED threshold to perform the first channel sensing procedure, and if a second channel sensing procedure uses the second set of sense beams, the IAB node 215 may use the second ED threshold to perform the second channel sensing procedure.

[0096] Additionally or alternatively, the ED threshold can be configured or otherwise determined based on whether the IAB node 215 performs a channel sensing process during simultaneous transmission. For example, the IAB node 215 can be configured with a first ED threshold that it can use if a channel sensing process (a first channel sensing process or a second channel sensing process) is performed in the presence of transmissions via another radio role (e.g., an MT role or a DU role) of the IAB node 215, and the IAB node 215 can be configured with a second ED threshold that it can use if a channel sensing process is performed without transmissions from the IAB node 215. In some examples, the first ED threshold that the IAB node 215 can use to perform a channel sensing process during transmission can have a larger value than the second ED threshold that the IAB node 215 can use to perform a channel sensing process without transmissions from the IAB node 215 (e.g., the first ED threshold can be a more lenient threshold than the second ED threshold). IAB node 215 can select either the first ED threshold or the second ED threshold based on whether IAB node 215 is scheduled to transmit during the channel sensing process.

[0097] In some examples, the ED threshold may be received or configured as an absolute value at IAB node 215. For example, signaling indicating or configuring the ED threshold at IAB node 215 may include multiple bits (such as a bitstream) corresponding to the absolute value (full value) of the ED threshold. In some other examples, the ED threshold may be indicated to or configured at IAB node 215 as an offset relative to a default value (e.g., a default value defined by the specification) or an offset relative to the indicated parameter. For example, IAB node 215 may be configured with or otherwise determine a default value, and signaling to IAB node 215 (from IAB donor node 210 or parent IAB node 215) may indicate an offset relative to the default value. In such examples, IAB node 215 may use the default value and the offset value to calculate or otherwise determine the ED threshold. For example, IAB node 215 may add, subtract, or perform any other mathematical operations, including the default value and the offset value, to calculate or otherwise determine the ED threshold. In some implementations, the default value may be a default ED threshold. Additionally or alternatively, IAB node 215 may receive indications of parameters and offset values ​​(from either IAB donor node 210 or parent IAB node 215), and IAB node 215 may use the indicated parameters and offset values ​​to calculate or otherwise determine the ED threshold. The indicated parameters may be any communication parameters and may be explicitly or implicitly signaled to IAB node 215.

[0098] In some other examples, IAB node 215 can determine the ED threshold without receiving additional signaling from another device (either from IAB donor node 210 or parent IAB node 215). In such examples, IAB node 215 can use a formula (such as one defined in the specification) to determine the ED threshold. In some implementations, IAB node 215 (a device in the wireless backhaul network) can use a formula to determine the ED threshold in a manner similar to how a device in the access network can determine the ED threshold (e.g., as defined in the NR-U specification). Additionally or alternatively, IAB node 215 can determine the ED threshold as a result of multiple rules or formulas, or both, using a category corresponding to (e.g., consider) the wireless role of IAB node 215. For example, IAB node 215 can determine a first ED threshold for a first channel sensing procedure based on the category of the MT role, and a second ED threshold for a second channel sensing procedure based on the category of the DU role. In some examples, the category of the MT role can include a wide-area class or a local class.

[0099] Therefore, IAB node 215 can receive instructions or otherwise select or determine the configuration of individual channel sensing procedures and ED thresholds, and can execute individual channel sensing procedures accordingly. For example, IAB node 215 can measure the energy of the channel during a first channel sensing procedure in the measurement region of a first sensing slot, which may be referred to herein as the ED value, and initiate a COT for transmission via the MT role based on whether the measured energy meets (e.g., is less than or equal to) a first ED threshold. Similarly, IAB node 215 can measure the energy of the channel during a second channel sensing procedure in the measurement region of a second sensing slot, and initiate a COT for transmission via the DU role as a result of determining whether the measured energy meets a second ED threshold.

[0100] Figure 3 Example IAB networks 300, 301, and 302 are illustrated to support channel sensing processes for communication at IAB nodes. In some examples, IAB networks 300, 301, and 302 may implement aspects of wireless communication system 100 or IAB network 200. IAB networks 300, 301, and 302 illustrate examples of different duplex capabilities of IAB node 310, which may serve as a reference. Figure 1 and Figure 2 Examples of the corresponding devices described, such as references Figure 2 The IAB node 215 is described.

[0101] IAB node 310 can have duplex capability, and in some implementations, it can send a duplex capability indication to parent node 305, which can be a reference node. Figure 2Examples of parent IAB node 215 or IAB donor node 210 are described. In some examples, depending on the duplex capability of IAB node 310, IAB node 310 may be configured to receive, or otherwise receive, instructions for performing separate channel sensing procedures for transmissions via the MT role and transmissions via the DU role. IAB node 310 may support TDM communication technology between communication on wireless backhaul link 320 and sublink 325 (which may be an example of an access link), or may support different duplex capabilities (e.g., enhanced duplex capabilities), such as half-duplex SDM for simultaneous reception or simultaneous transmission, or full-duplex SDM for simultaneous transmission and reception.

[0102] In the IAB network 300, IAB node 310-a can establish MT and DU roles, and can communicate with parent node 305-a via the MT role on the radio backhaul link 320, and can communicate with child node 315-a and UE 115-a via the DU role on the child link 325. In some examples, IAB node 310-a can support half-duplex SDM capability, and therefore can receive multiple signals simultaneously. For example, IAB node 310-a can simultaneously receive signaling from child node 315-a and UE 115-a via the child link 325, and receive signaling from parent node 305-a via the radio backhaul link 320.

[0103] In IAB network 301, IAB node 310-b can establish MT and DU roles, and can communicate with parent node 305-b on radio backhaul link 320 via MT role, and can communicate with child node 315-b and UE 115-b on child link 325 via DU role. In some examples, IAB node 310-b can support half-duplex SDM capability, and therefore can transmit multiple signals simultaneously. For example, IAB node 310-b can simultaneously send signaling (e.g., downstream communication) to child node 315-b or UE 115-b on child link 325 via DU role, and can send signaling (e.g., upstream communication) to parent node 305-b on radio backhaul link 320 via MT role. In some implementations, IAB node 310-b may perform a separate channel sensing process prior to transmission via the MT role and DU role. For example, see reference... Figure 2 Figure 5 and additional details related to performing a separate channel sensing process are described in this paper.

[0104] In IAB network 302, IAB node 310-c can establish MT and DU roles, and can communicate with parent node 305-c on radio backhaul link 320 via MT role, and can communicate with child node 315-c and UE 115-c on child link 325 via DU role. In some examples, IAB node 310-c can support full-duplex SDM capability, and therefore can transmit and receive multiple signals simultaneously. For example, IAB node 310-c can simultaneously transmit and receive signaling to or from child node 315-c or UE 115-c on child link 325 via DU role, and can simultaneously transmit and receive signaling to or from parent node 305-c on radio backhaul link 320 via MT role. In some implementations, IAB node 310-c may perform a separate channel sensing process prior to transmission via the MT role and DU role. For example, see reference... Figure 2 Figure 5 and additional details related to performing a separate channel sensing process are described in this paper.

[0105] Figure 4 Example channel sensing configurations 400, 401, and 402 are shown to support a channel sensing process for communication at an IAB node. In some examples, channel sensing configurations 400, 401, and 402 may implement aspects of wireless communication system 100 or IAB network 200. Channel sensing configurations 400, 401, and 402 illustrate example channel sensing configurations, where a wireless node (which may be a reference) Figure 1-3 The example IAB node described can use this configuration to perform separate channel sensing procedures for transmissions via the MT and DU roles through the IAB node.

[0106] Channel sensing configuration 400 illustrates an example of a wireless node implementing a Type 1 channel sensing procedure to gain access and initiate COT 425 (e.g., in NR-U shared spectrum). A Type 1 channel sensing procedure, which can be equivalently referred to as a Type 1 channel access procedure, may include a random number of time slots N that the wireless node can sense (e.g., a random number of time slots N during which the wireless node can measure channel energy). For example, the wireless node may identify a busy channel during time period 405 and may perform a Type 1 channel sensing procedure when time period 405 and one or more delayed time periods 410 expire. Delayed time periods 410 may include time slot 415 and multiple time slots 420. The wireless node may, according to, m p The parameters are used to select or otherwise determine the number of time slots 420 in the delay period 410. For example, a wireless node can use m pParameters are used to select or determine the number of time slots 420 that can follow time slot 415. As shown in the channel sensing configuration 400, m p The time slot can be equal to 3, therefore, three time slots 420 can follow time slot 415. In some examples, time slot 415 can span a duration equal to 16 microseconds, while time slot 420 can span a duration equal to the basic sensing time unit, which can be equal to 9 microseconds. Therefore, in which m p In the example where the value is 3, the delay period 410 can span a duration of 43 microseconds (16+m). p *9=16+3*9=43).

[0107] When the delay period 410 expires, the wireless node can sense a random number (which may be represented as N, where N≥0) of sensing slots that were discovered, sensed, or otherwise determined to be idle before transmission. In some examples, each sensing slot that the wireless node can sense may include a measurement area 430. Each sensing slot may span a duration equal to a basic sensing time unit, which may be equal to 9 microseconds, and each measurement area 430 within a sensing slot may span a duration of at least 4 microseconds. When performing a Type 1 channel sensing procedure, the wireless node may maintain a counter initially set to N and decrement the counter by 1 for each sensing slot that the wireless node senses to be idle. For example, the wireless node may measure the energy of the channel during the measurement area 430 within a sensing slot and decrement the counter by 1 if the measured energy meets an ED threshold. In an example where the measured energy fails to meet the ED threshold, the wireless node may determine that the sensing slot is busy, maintain the counter at its current value, wait for another delay period 410 after the sensing slot determined to be busy, and continue the channel sensing procedure in the sensing slots after the delay period 410. In such an example, the wireless node can continue to decrement the counter by 1 for each sensing slot that is measured to be idle, and wait for another delay period 410 if another sensing slot is measured to be busy before the counter reaches zero.

[0108] Once the counter at the wireless node reaches zero, the wireless node has sensed a total of N idle sensing slots, and in some examples, has completed the Type 1 channel sensing process, and can transmit at the next scheduled or allocated transmission opportunity. In examples where the counter reaches zero before the next scheduled or allocated transmission opportunity (e.g., if there is a time gap between the Nth idle sensing slot and the next scheduled or allocated transmission opportunity), the behavior of the wireless node can vary. In some examples, the wireless node can keep the counter value at zero and perform channel sensing in the sensing slot before the next scheduled or allocated transmission opportunity (such as immediately before, aligning the sensing slot with the start of the scheduled or allocated transmission opportunity), and if the sensing slot is sensed as idle, it can transmit at the scheduled or allocated opportunity. In some other examples, the wireless node can continue sensing the channel after the counter reaches zero, and for each sensed idle slot, it can decrease the counter value to above zero (to a negative value). In such examples, if the counter value is less than or equal to zero, the wireless node can transmit at the scheduled or allocated opportunity. If a wireless device senses a busy time slot when the counter is zero, the wireless node can restart the Type 1 channel sensing process (e.g., by using a newly generated random number N on the counter).

[0109] In an example where the wireless node is an IAB node and the energy of the channel that satisfies the ED threshold of the first channel sensing procedure (making the counter less than or equal to zero) is measured in a total of N sensing slots, the IAB node can initiate COT 425-a and transmit via the MT role or DU role, or both. In some examples, the wireless node (e.g., the IAB node), parent node, child node, UE115, or base station 105 can use a Type 1 channel sensing procedure to initiate COT 425-a. The duration of COT 425-a initiated for transmission via the wireless node's MT role or DU role, or both, can be less than or equal to the maximum COT associated with the priority class of the transmission (service) from the wireless node. The priority class can be equivalently referred to as the Channel Access Priority Class (CAPC), can be denoted by the symbol p, and can be described with reference to Table 1.

[0110]

[0111] Table 1

[0112] Table 1 shows examples of various parameters that can be associated with the Type 1 channel sensing procedure (CAPC) used for downlink or uplink transmission. As shown in Table 1, the wireless node can use different parameters to determine the configuration of the Type 1 channel sensing procedure based on the type of traffic transmitted via the MT or DU role. For example, the wireless node can use the parameter CW min,p and CWmax,p To select the lower and upper bounds of the contention window (CW) that the wireless node can use to perform a Type 1 channel sensing procedure, respectively. The CW can include a list of values, such as CW... p As shown in the size column, the wireless node can select (e.g., randomly select) the value to be set as the counter. For example, as a random selection (via a random number generator) from CW p The result of the magnitude of N allows the wireless node to select, calculate, or determine it. The wireless node can use this parameter T. mcot,p To select or determine how long a wireless node can maintain COT after or as a result of a Type 1 channel sensing process.

[0113] Channel sensing configurations 401 and 402 illustrate examples of a type 2 channel sensing procedure that a radio node can implement to gain access and initiate COT 425 (e.g., in NR-U shared spectrum). For example, channel sensing configuration 401 may illustrate an example of a type 2A channel sensing procedure that can be equivalently referred to as a type 2A channel access procedure, and channel sensing configuration 402 may illustrate an example of a type 2B channel sensing procedure that can be equivalently referred to as a type 2B channel access procedure. In some examples, a radio node, parent node, or base station 105 may use a type 2 channel sensing procedure to initiate COT 425 for discovering signal transmissions. Additionally or alternatively, a radio node, parent node, child node, base station 105, or UE 115 may use a type 2 channel sensing procedure to transmit a transmission after a time gap within a previously initiated COT 425 or shared COT 425. In such an example, the wireless node, parent node, child node, base station 105, or UE 115 can perform a relatively low-latency channel sensing procedure (compared to a Type 1 channel sensing procedure) to access the channel within a previously initiated COT 425. The parameter ULtoDL-CO-SharingED-Threshold-r16 can indicate the upper limit ED threshold (maximum ED threshold) that can be used to allow a COT initiated by the wireless node or UE to be shared with the parent wireless node or base station 105. The parameter ULtoDL-CO-SharingED-Threshold-r16 can be configured by the parent wireless node or base station 105 based on the transmission power (e.g., maximum transmission power) of the wireless node, parent wireless node, or base station 105.

[0114] A type 2A channel sensing procedure, as shown in channel sensing configuration 401, enables a wireless node to send signaling as a result of sensing that the channel is idle for a defined period of time (e.g., as a result of calculating or determining that the measured energy meets an ED threshold). For example, channel sensing configuration 401 may show a channel sensing procedure with a duration of 25 microseconds. This channel sensing procedure can be used by the wireless node in examples where the time interval between switching from downlink to uplink is greater than or equal to 25 microseconds and the interval between switching from uplink to downlink is equal to 25 microseconds.

[0115] Channel sensing configuration 401 may use two sensing slots 440, including sensing slot 440-a at the beginning of channel sensing configuration 401 and sensing slot 440-b at the end of channel sensing configuration 401. Each sensing slot 440 may include a measurement region 435 during which the wireless node may measure the energy of the channel. For example, sensing slot 440-a may include measurement region 435-a, and sensing slot 440-b may include measurement region 435-b, and the wireless node may perform a type 2A channel sensing procedure by measuring the energy of the channel during measurement regions 435-a and 435-b. In an example where the measured energy satisfies the ED threshold of the channel sensing procedure in measurement regions 435-a and 435-b, the wireless node may determine that the channel is idle (e.g., available) and may initiate COT 425-b. In some examples, sensing time slots 440-a and 440-b can span a duration equal to the basic sensing time unit, which can be equal to 9 microseconds, and measurement areas 435-a and 435-b can span a duration equal to 4 microseconds.

[0116] A type 2B channel sensing procedure, as shown in channel sensing configuration 402, enables a wireless node to send signaling as a result of sensing that the channel is idle for a defined period of time (e.g., as a result of calculating or determining that the measured energy meets an ED threshold). For example, channel sensing configuration 402 may show a channel sensing procedure with a duration of 16 microseconds. This channel sensing procedure can be used by a wireless node in examples where the time interval between switching from downlink to uplink, from uplink to uplink, from uplink to downlink, or from downlink to downlink is equal to 16 microseconds.

[0117] Channel sensing configuration 402 may include a sensing time slot 450 and a measurement region 445 located at the end of channel sensing configuration 402. In some examples, sensing time slot 450 may include at least a first portion of measurement region 445 equal to duration 455, while in some embodiments, a second portion of measurement region 445 may be outside sensing time slot 450. For example, sensing time slot 450 may span a duration equal to a basic sensing time unit, which may be equal to 9 microseconds, and may include at least 4 microseconds of measurement region 445 (e.g., duration 455 may be equal to at least 4 microseconds). In some examples, measurement region 445 may span a duration equal to 5 microseconds. As a result of performing a type 2B channel sensing procedure, the wireless node may measure the energy of the channel during measurement region 445 included within sensing time slot 450, and initiate COT 425-c if the measured energy meets the ED threshold of the channel sensing procedure. In the example where the measured energy meets the ED threshold, the wireless node may initiate COT 425-c.

[0118] In some examples, where the wireless node is an IAB node, the wireless node can perform a Type 2C channel sensing procedure, which can be equivalently referred to as a Type 2C channel access procedure, and can avoid performing any channel sensing before sending any transmissions via the MT role or DU role or both. In examples where the time interval between switching from downlink to uplink, from uplink to uplink, from uplink to downlink, or from downlink to downlink is less than or equal to 16 microseconds, and in examples where the transmission via the MT role or DU role or both is less than a threshold duration (e.g., less than 584 microseconds), the IAB node can perform a Type 2C channel sensing procedure.

[0119] In examples where a wireless node performs a Type 1, Type 2A, or Type 2B channel sensing procedure, the wireless node may measure the channel energy in at least one sensing slot, including a measurement area, before transmission. For example, Type 1, Type 2A, and Type 2B channel sensing procedures may include different numbers of sensing slots or span different total durations, but the last sensing slot of each type of channel sensing procedure (e.g., the latest sensing slot in time or the sensing slot aligned with COT 425) may be common to all three types of channel sensing procedures. For example, for each type of channel sensing procedure, the sensing slot aligned with COT 425 may be a 9-microsecond sensing slot and include at least a 4-microsecond measurement area during which the wireless node can sense the channel. This final sensing slot common to all three types of channel sensing procedures may also include a time gap T1 between the measurement area of ​​the sensing slot and the start of COT 425. In some examples, the time gap T1 may be a time gap that provides processing time for the node and may include sufficient time for the wireless node to switch from sensing to transmission.

[0120] In some implementations, the wireless node can select or determine the timing of individual channel sensing processes (which may include any combination of Type 1, Type 2A, or Type 2B channel sensing processes) based on the wireless node's sensing capabilities and duplex capabilities. For example, with reference to Figure 5, additional details related to the timing of individual channel sensing processes are described herein.

[0121] Figure 5A and Figure 5B Example communication timelines 500, 501, 502, 503, and 504 are shown to support a channel sensing process for communication at an IAB node. In some examples, communication timelines 500, 501, 502, 503, and 504 may implement aspects of wireless communication system 100 or IAB network 200. In some implementations, it may be a reference. Figure 1-4 The example IAB node 530 of the described corresponding device can perform a separate channel sensing process to initiate COT for transmissions via the MT role and DU role of the IAB node.

[0122] IAB node 530 can support various timing options for transmissions made via the MT role and DU role of IAB node 530. In some examples, the IAB network including IAB node 530 can support baseline timing options, where transmissions via the DU role of IAB node 530 within the IAB network are time-aligned, and where transmissions via the MT role of IAB node 530 within the IAB network are controlled by the DU role of the parent node. For example, the DU role of the parent node can use a timing advance (TA) framework to control transmissions via the MT role of the child node. In examples where IAB node 530 uses baseline timing, transmissions via the MT role of IAB node 530 (which may be referred to as MT transmission 505) can be time-offset with transmissions via the DU role of IAB node 530 (which may be referred to as DU transmission 510).

[0123] In some implementations, aligned MT transmissions 505 and DU transmissions 510 can experience reduced self-interference. For example, aligned transmissions can reduce interference that might arise during channel sensing in another radio role from a transmission in one radio role. Therefore, in an example where MT transmission 505 might interfere with DU transmission 510, IAB node 530 can use aligned MT transmissions 505 and DU transmissions 510, and alternatively, in an example where MT transmission 505 is unlikely to interfere with DU transmission 510, IAB node 530 can use baseline timing (where MT transmission 505 may be time-offset with DU transmission 510). For example, in an example where IAB node 530 transmits MT transmission 505 and DU transmission 510 using separate antenna panels that are sufficiently isolated from each other, IAB node 530 can use baseline timing.

[0124] As shown in communication timeline 500, IAB node 530-a can be scheduled to send MT transmission 505-a and DU transmission 510-a, and baseline timing options can be used. Therefore, MT transmission 505-a can be offset from DU transmission 510-a in time. For example, MT transmission 505-a can precede DU transmission 510-a by a time gap T3, which can be calculated or determined using the TA and T_delta parameters of IAB node 530-a. For example, T3 can be defined as T3 = TA / 2 + T_delta.

[0125] In some examples, MT transmission 505-a may be associated with sensing time slot 515-a, during which IAB node 530-a may perform a first channel sensing procedure, and DU transmission 510-a may be associated with sensing time slot 520-a, during which IAB node 530-a may perform a second channel sensing procedure. Sensing time slots 515-a and 520-a may be examples of the last sensing time slot (e.g., the latest sensing time slot in time or a sensing time slot aligned with the start of COT) of a type 1, type 2A, or type 2B channel sensing procedure, as shown in the reference. Figure 4 In more detail, sensing time slots 515-a and 520-a may each include a measurement region 535 during which IAB node 530-a can measure the energy of the channel.

[0126] In some implementations, IAB node 530-a may be able to simultaneously transmit MT transmission 505-a and DU transmission 510-a, and may have sensing capabilities or may have been configured such that IAB node 530-a can perform a channel sensing process while transmitting simultaneously. For example, IAB node 530-a may be able to perform a second channel sensing during the measurement region 535 of sensing time slot 520-a that overlaps with MT transmission 505-a in time. In such an example, as a result of aligning sensing time slot 515-a with MT transmission 505-a, IAB node 530-a may determine the timing of sensing time slot 515-a for performing the first channel sensing process, and as a result of aligning sensing time slot 520-a with DU transmission 510-a, IAB node 530-a may determine the timing of sensing time slot 520-a for performing the second channel sensing process.

[0127] In some implementations, when IAB node 530-a is transmitting MT transmission 505-a, by applying signal processing techniques to sensing time slot 520-a, IAB node 530-a can perform a second channel sensing process simultaneously with transmitting MT transmission 505-a. In some examples, signal processing techniques can eliminate or reduce interference experienced while performing the second channel sensing process while simultaneously transmitting MT transmission 505-a. In some other implementations, as a result of measuring or otherwise determining that IAB node 530-a meets an interference metric, IAB node 530-a can perform a second channel sensing process simultaneously with transmitting MT transmission 505-a. For example, IAB node 530-a can measure or determine that the antenna panel used by the MT role can be sufficiently isolated from the antenna panel used by the DU role by time interval, frequency interval, or spatial interval, or any combination thereof.

[0128] As shown in communication timeline 501, IAB node 530-b can be scheduled to send MT transmission 505-b and DU transmission 510-b, and baseline timing options can be used. Therefore, MT transmission 505-b can be time-offset with DU transmission 510-b. For example, MT transmission 505-b can precede DU transmission 510-b by a time slot T3. In some examples, MT transmission 505-b can be associated with sensing time slot 515-b, during which IAB node 530-b can perform a first channel sensing procedure, and DU transmission 510-b can be associated with sensing time slot 520-b, during which IAB node 530-b can perform a second channel sensing procedure. Sensing time slots 515-b and 520-b can be examples of the last sensing time slot of a Type 1, Type 2A, or Type 2B channel sensing procedure (e.g., the latest sensing time slot in time or a sensing time slot aligned with the start of COT), as shown in the reference. Figure 4 In more detail, sensing time slot 515-b and sensing time slot 520-b may each include a measurement region 535 during which IAB node 530-b can measure the energy of the channel.

[0129] In some implementations, IAB node 530-b may be able to transmit MT transmission 505-b and DU transmission 510-b simultaneously, and may have sensing capabilities or may have been configured such that IAB node 530-b can avoid performing channel sensing procedures while transmitting simultaneously. For example, IAB node 530-b may not be able to perform a second channel sensing during the measurement region 535 of sensing time slot 520-b, which overlaps with MT transmission 505-b in time. Therefore, IAB node 530-b may offset sensing time slot 520-b from DU transmission 510-b by a gap 525 (e.g., a time gap) such that the measurement region 535 of sensing time slot 520-b does not overlap with MT transmission 505-b in time. Therefore, as a result of aligning sensing time slot 515-b with MT transmission 505-b, IAB node 530-b can select, configure, or otherwise determine the timing of sensing time slot 515-b for performing the first channel sensing process, and IAB node 530-b can select, configure, or otherwise determine the timing of sensing time slot 520-b for performing the second channel sensing process based on DU transmission 510-b and gap 525, such that sensing time slot 520-b is offset from DU transmission 510-b.

[0130] In some examples, as a result of measuring or otherwise determining that IAB node 530-b fails to meet an interference metric, IAB node 530-b may select or determine offset sensing time slot 520-b from DU transmission 510-b. For example, IAB node 530-b may measure or determine that the antenna panel used by the MT role and the antenna panel used by the DU role are not adequately isolated, and that a transmission from either the MT role or the DU role may cause interference at the other radio role. In some implementations, if T3 is less than or equal to a threshold, IAB node 530-b may select or determine offset sensing time slot 520-b from DU transmission 510-b.

[0131] As shown in communication timeline 502, IAB node 530-c can be scheduled to send MT transmission 505-c and DU transmission 510-c, and baseline timing options can be used. Therefore, MT transmission 505-c can be time-offset with DU transmission 510-c. For example, MT transmission 505-c can precede DU transmission 510-c by a time slot T3. In some examples, MT transmission 505-c can be associated with sensing time slot 515-c, during which IAB node 530-c can perform a first channel sensing process, and DU transmission 510-c can be unassociated with sensing time slot 520-c, during which IAB node 530-c can perform a second channel sensing process. For example, IAB node 530-c can perform the first channel sensing process during sensing time slot 515-c and can avoid performing the second channel sensing process during sensing time slot 520-c (e.g., sensing time slot 520-c may have no channel sensing process). In some implementations, if T3 is less than a threshold duration, or if the DU transmission 510-c spans a duration less than a threshold duration (e.g., less than 584 microseconds), or both, the IAB node 530-c may avoid performing a second channel sensing process on the DU transmission 510-c.

[0132] For reference Figure 4 In more detail, sensing slot 515-c may be an example of the last sensing slot in a type 1, type 2A, or type 2B channel sensing process (e.g., the latest sensing slot in time or a sensing slot aligned with the start of COT), and empty sensing slot 520-c may be an example of a sensing slot in a type 2C channel sensing process. Sensing slot 515-c may include a measurement region 535, during which IAB node 530-c may measure the energy of the channel.

[0133] As shown in communication timeline 503, IAB node 530-d can be scheduled to send MT transmission 505-d and DU transmission 510-d, and baseline timing options can be used. Therefore, MT transmission 505-d can be time-offset with DU transmission 510-d. For example, MT transmission 505-d can precede DU transmission 510-d by a time slot T3. In some examples, MT transmission 505-d can be associated with sensing time slot 515-d, during which IAB node 530-d can perform a first channel sensing procedure, and DU transmission 510-d can be associated with sensing time slot 520-d, during which IAB node 530-d can perform a second channel sensing procedure. Sensing time slots 515-d and 520-d can be examples of the last sensing time slot of a type 2A or type 2B channel sensing procedure (e.g., the latest sensing time slot in time or a sensing time slot aligned with the start of COT), as shown in the reference. Figure 4 In more detail, sensing time slots 515-d and 520-d may each include a measurement region 535 during which IAB node 530-d can measure the energy of the channel.

[0134] In some implementations, IAB node 530-d can adjust the timing of the measurement region 535 within the sensing time slot as a supplement to or alternative to adjusting the timing of the sensing time slot. For example, IAB node 530-d can modify the measurement region 535 within sensing time slot 520-d such that IAB node 530-d can perform a second channel sensing process during the measurement region 535 of sensing time slot 520-d without interference from MT transmission 505-d and without altering the alignment of sensing time slot 520-d with DU transmission 510-d. In some examples, IAB node 530-d can adjust the measurement region 535 within sensing time slot 520-d such that a measurement region 535 of less than 4 microseconds is within sensing time slot 520-d. This adjustment of the measurement region 535 within sensing time slot 520 can be applied to both Type 2A and Type 2B channel sensing processes.

[0135] As shown in communication timeline 503, IAB node 530-e can be scheduled to send MT transmission 505-e and DU transmission 510-e, and baseline timing options can be used. Therefore, MT transmission 505-e can be time-offset with DU transmission 510-e. For example, MT transmission 505-e can precede DU transmission 510-e by a time slot T3. In some examples, MT transmission 505-e can be associated with sensing time slot 515-e, during which IAB node 530-e can perform a first channel sensing procedure, and DU transmission 510-e can be associated with sensing time slot 520-e, during which IAB node 530-e can perform a second channel sensing procedure. Sensing time slots 515-e and 520-e can be examples of the last sensing time slot of a type 2B channel sensing procedure (e.g., the latest sensing time slot in time or a sensing time slot aligned with the start of COT), as referenced. Figure 4 In more detail, sensing time slots 515-e and 520-e may each include a measurement region 535 during which IAB node 530-d can measure the energy of the channel.

[0136] Similar to communication timeline 503, communication timeline 504 also illustrates an implementation in which IAB node 530-e can adjust the timing of the measurement region 535 within the sensing time slot as a supplementary or alternative to adjusting the timing of the sensing time slot. For example, IAB node 530-e can modify the measurement region 535 within sensing time slot 520-e such that IAB node 530-e can perform a second channel sensing process during the measurement region 535 of sensing time slot 520-e without interference from MT transmission 505-e and without changing the alignment of sensing time slot 520-d with DU transmission 510-e. In some examples, IAB node 530-e can adjust the measurement region 535 within sensing time slot 520-e such that a measurement region 535 of less than 4 microseconds is within sensing time slot 520-e. In such an example, sensing time slot 515-e may include a first portion of a measurement region 535 spanning a duration greater than or equal to 4 microseconds, and sensing time slot 520-e may include a second portion of the measurement region 535 within a sensing window of less than 4 microseconds. In some implementations, if T3 is less than a threshold duration, or if the DU transmission 510-e spans a duration less than a threshold duration (e.g., less than 584 microseconds), the IAB node 530-e may adjust the measurement region 535 within sensing time slot 520-e to less than 4 microseconds. This adjustment of the measurement region 535 within a sensing time slot can be applied to a type 2B channel sensing process.

[0137] During the execution of the first channel sensing procedure and the second channel sensing procedure, the IAB node 530 may select or determine whether to transmit MT transmission 505 or DU transmission 510, or both, based on the success of the first channel sensing procedure, the second channel sensing procedure, or both, and the duplex capability of the IAB node 530. For example, in an example where both the first and second channel sensing procedures are successful, but the IAB node 530 cannot transmit simultaneously via multiple radio roles, the IAB node 530 may select either MT transmission 505 or DU transmission 510 to transmit during the initiated COT, and either transmit the remaining transmissions (within the same COT) after transmitting the selected transmission, or determine to initiate a new COT for the remaining transmissions.

[0138] The first channel sensing process for MT transmission 505 and the second channel sensing process for DU transmission 510 can be implemented independently or in combination with each other. For example, in some embodiments, the IAB node 530 can perform the first channel sensing process independently of the second channel sensing process; therefore, the IAB node can initiate a first COT for MT transmission 505 and a second COT for DU transmission 510. This independent channel sensing process can be performed at different antenna panels of the IAB node 530, which are sufficiently isolated from each other. In some other embodiments, the IAB node 530 can perform the first channel sensing process in conjunction with the second channel sensing process.

[0139] For example, IAB node 530 may measure the ED value at the first antenna panel during the first channel sensing process, initiate a COT for MT transmission 505 as a result of measuring or determining that the ED value meets a first ED threshold of the first channel sensing process, and share the initiated COT with DU transmission 510 as a result of measuring or determining that the measured ED value also meets a second ED threshold of the second channel sensing process. IAB node 530 may perform a similar process to perform a second channel sensing process at the second antenna panel, initiate a COT for DU transmission 510 as a result of measuring or determining that the measured ED value meets a second ED threshold, and share the initiated COT with MT transmission 505 as a result of measuring or determining that the measured ED value also meets a first ED threshold. In some examples, IAB node 530 may be used to configure or determine whether the ED threshold for the first wireless node to share a COT initiated for the second wireless node may be more stringent (e.g., a lower threshold) than the ED threshold that IAB node 530 could use if the channel sensing process were performed at the antenna panel used by the first wireless node.

[0140] Furthermore, although the first channel sensing process is described as being for MT transmission 505 and the second channel sensing process is described as being for DU transmission 510, the first channel sensing process may additionally or alternatively be a channel sensing process using a first or more receive beams (or sense beams) corresponding to a first set of transmit beams used by the IAB node 530 for transmission via the MT role of the IAB node 530. Similarly, the second channel sensing process may additionally or alternatively be a channel sensing process using a second or more receive beams (or sense beams) corresponding to a second set of transmit beams used by the IAB node 530 for transmission via the DU role of the IAB node 530. Therefore, the independent channel sensing process may be considered beam-specific or role-specific, or both, depending on the implementation.

[0141] Additionally, although shown in communication timelines 500, 501, 502, 503, and 504 as using the baseline timing option, the described techniques are equally applicable to examples where the aligned transmission timing option is used. For example, an IAB network including IAB node 530 may support half-duplex (e.g., simultaneous SDM transmission or simultaneous SDM reception) or full-duplex (e.g., simultaneous transmission and reception) capabilities, which may support aligned transmission or reception, or both, via the MT and DU roles of IAB node 530. For example, in an example where IAB node 530 uses aligned timing, MT transmission 505 may be time-aligned with DU transmission 510. In such an example, IAB node 530 may select, configure, or otherwise determine the timing of sensing slot 515 for performing a first channel sensing procedure and the timing of sensing slot 520 for performing a second channel sensing procedure using aligned transmission timing.

[0142] In some other examples, IAB node 530 can align (e.g., manually align) MT transmission 505 and DU transmission 510 by adding padding signals, such as extended cyclic prefix (CP), to either MT transmission 505 or DU transmission 510, depending on which of them is scheduled for a later transmission. In such examples, IAB node 530 can use the timing of the manually aligned MT transmission 505 and DU transmission 510 to select, configure, or otherwise determine the timing of sensing slot 515 for performing the first channel sensing procedure and the timing of sensing slot 520 for performing the second channel sensing procedure. For example, refer to... Figure 6 This document describes additional details regarding adding a fill signal to one of the MT Transmission 505 and DU Transmission 510.

[0143] Figure 6An example alignment process 600 supporting channel sensing for communication at IAB nodes is illustrated. In some examples, alignment process 600 can be implemented to achieve aspects of wireless communication system 100 or IAB network 200. In some implementations, it may be a reference... Figure 1 The IAB node 625 of the example device described in -5 can use the alignment process 600 to manually align the MT transmission 605 with the DU transmission 610, and can select, configure or otherwise determine the timing for performing the first channel sensing process for the MT transmission 605 and the second channel sensing process for the DU transmission 610 based on the manually aligned transmission timing.

[0144] For example, IAB node 625 can be scheduled to send MT transmission 605 and DU transmission 610 simultaneously, and baseline timing options can be used. Therefore, MT transmission 605 can be offset from DU transmission 610 in time. For example, MT transmission 605 can precede DU transmission 610 by a time gap T3, which can be determined using the TA and T_delta parameters of IAB node 625. For example, T3 can be defined as T3 = TA / 2 + T_delta.

[0145] In some implementations, as a result of using padding signal 615, IAB node 625 may fully or partially align DU transmission 610 with MT transmission 605. For example, IAB node 625 may add or otherwise apply padding signal 615 to DU transmission 610 to manually align DU transmission 610 with MT transmission 605 (fully or partially). Padding signal 615 can be an example of any signaling, and in some examples, IAB node 625 may add padding signal 615 to DU transmission 610 by using an extended CP in the first OFDM symbol 620 of transmitting DU transmission 610. Procedure 630 illustrates an example procedure that IAB node 625 may perform to add (or extend) the initial CP 635 of DU transmission 610 to an extended CP 640 added to DU transmission 610. As shown in procedure 630, adding or using extended CP 640 increases the length of DU transmission 610, such that a longer DU transmission 610 can be aligned with MT transmission 605. In some examples, OFDM symbol 620 may be the first symbol of COT, which includes DU transmission 610.

[0146] In some examples, IAB node 625 may report that the IAB node supports the ability to add padding signal 615 (such as extended CP 640) to DU transmission 610. In some implementations, IAB node 625 may send a message to a parent IAB node or IAB donor node (e.g., the CU of the IAB donor node) including an indication that IAB node 625 supports the ability to add padding signal 615. IAB node 625 may send the message as an F1-AP message, an RRC message, or a MAC-CE. Additionally or alternatively, IAB node 625 may receive a message configuring IAB node 625 to add padding signal 615 to the first symbol of DU transmission 610 from a parent IAB node or IAB donor node (e.g., the CU of the IAB donor node). The parent IAB node may send the message as a MAC-CE or in a DCI to IAB node 625, and the IAB donor node may send the message as an F1-AP message or an RRC message to IAB node 625.

[0147] Although the alignment process 600 is described in the context of adding padding signal 615 to DU transmission 610, the described technique can be equally applied to the context of adding padding signal 615 to MT transmission 605. For example, in an example where DU transmission 610 is scheduled as a transmission earlier than MT transmission 605, IAB node 625 can add padding signal 615 to the first symbol of MT transmission 605 to manually align MT transmission 605 with DU transmission 610 (fully or partially aligned).

[0148] After the MT transmission 605 and DU transmission 610 are fully or partially aligned, the IAB node 625 can select or determine the timing of a first sensing time slot for performing a first channel sensing procedure and a second sensing time slot for performing a second channel sensing procedure based on the transmission timing of the alignment (manual alignment) of the MT transmission 605 and DU transmission 610. In some examples where the IAB node 625 adds a padding signal 615 to align the MT transmission 605 and DU transmission 610, the IAB node 625 can align the first sensing time slot for performing the first channel sensing procedure with the transmission timing of the MT transmission 605 and determine to align the second sensing time slot for performing the second channel sensing procedure with the timing of the padding signal 615. Therefore, the IAB node 625 can perform a separate channel sensing procedure, and in examples where the measured energy meets the ED threshold, the IAB node 625 can initiate a COT for transmitting the MT transmission 605 and DU transmission 610.

[0149] Figure 7An example process flow 700 supporting a channel sensing process for communication at an IAB node is shown. In some examples, process flow 700 may implement aspects of wireless communication system 100 or IAB network 200. Process flow 700 may illustrate communication between IAB node 705, parent node 710 (which may be an example of a parent IAB node or an IAB donor node), and child node 715 (which may be an example of a child IAB node or UE 115). IAB node 705, parent node 710, and child node 715 may be references Figure 1-6 Examples of the corresponding devices described. In some examples, IAB node 705 may perform separate channel sensing procedures for transmissions via the MT role and DU role of IAB node 705. Alternative examples are possible, some of which may be performed in a different order than described or not at all. In some implementations, the procedures may include additional features not mentioned below, or further procedures may be added.

[0150] At 720, IAB node 705 can establish a first radio role and a second radio role. The first radio role of IAB node 705 can be the MT role of IAB node 705, and the second radio role of IAB node 705 can be the DU role of IAB node 705. In some examples, IAB node 705 can use the first radio role (MT role) for upstream communication on the radio backhaul link between IAB node 705 and parent node 710, and IAB node 705 can use the second radio role (DU role) for downstream communication on the access link or radio backhaul link between IAB node 705 and child node 715. As described herein, the MT role and DU role can be separate entities (e.g., using different antenna panels) or they can be the same entity (e.g., sharing an antenna panel).

[0151] At 725, IAB node 705 can send capability signaling to parent node 710. In some examples, capability signaling may include sensing capability, duplex capability, the ability to add padding signals to transmissions via the MT or DU role of IAB node 705, the ability to add gaps or offsets between sensing time slots and transmissions, or any combination thereof. In examples where capability signaling includes sensing capability, capability signaling may include indications that IAB node 705 can perform separate channel sensing procedures for transmissions via the MT and DU roles of IAB node 705, indications that IAB node 705 can perform a common channel sensing procedure as multiple nodes (e.g., using different antenna panels), indications that IAB node 705 can perform a common channel sensing procedure at one entity while transmitting from different entities, indications that IAB node 705 can perform multiple channel sensing procedures simultaneously, or any combination thereof. In examples where capability signaling includes duplex capability, capability signaling may include indications that IAB node 705 has TDM capability, SDM simultaneous receive capability, SDM simultaneous transmit capability, or full-duplex capability. IAB node 705 can send sensing capabilities as one or more of F1-AP messages, RRC messages, or MAC-CE messages to parent node 710 (at least one of the central units of the parent IAB node or IAB donor node).

[0152] At 730, parent node 710 may send configuration signaling to IAB node 705. For example, IAB node 705 may receive configuration for performing a first channel sensing procedure and a second channel sensing procedure at IAB node 705. In some examples, the configuration for performing the channel sensing procedure may include an indication that IAB node 705 will perform a separate channel sensing procedure for transmissions via the MT role and DU role of IAB node 705, an indication of what type of channel sensing procedure (e.g., type 1, type 2A, or type 2B) IAB node 705 may perform, an indication of the timing of the separate channel sensing procedure (such as the shift gap between sensing time slots and transmission), an indication of one or more thresholds that IAB node 705 can use to determine the timing of the separate channel sensing procedure, or any combination thereof. IAB node 705 may receive the configuration as one or more of an F1-AP message or RRC message (in the example of configuration for transmission sent or output via the CU of the IAB donor node) or as one or more of a MAC-CE or DCI (in the example of configuration sent via the parent IAB node).

[0153] At 735, IAB node 705 can optionally, configure, or otherwise determine a first sensing time slot for performing a first channel sensing procedure and a second sensing time slot for performing a second channel sensing procedure. In some examples, the first sensing time slot is aligned with a first transmission timing of a first transmission, and the second sensing time slot is aligned with a second transmission timing of a second transmission (e.g., as described in reference communication timeline 500). In some other examples, the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is offset from the second transmission timing of the second transmission associated with the transmission timing of the first transmission (e.g., offset by a time slot) (e.g., as described in reference communication timeline 501). In some other examples, the first sensing time slot is aligned with the first transmission timing of the first transmission, and IAB node 705 avoids performing the second channel sensing procedure (e.g., as described in reference communication timeline 502).

[0154] In some other examples, the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is aligned with the second transmission timing of the second transmission, and the first sensing time slot may have a larger measurement area (longer measurement area duration) than the second sensing time slot (e.g., as described in reference communication timeline 503). In some examples, the measurement area of ​​the second sensing time slot may be further shifted into the sensing window of the second channel sensing process (e.g., further away from the transmission in time) (e.g., as described in reference communication timeline 504).

[0155] At 740, IAB node 705 may perform at least one of a first channel sensing procedure or a second channel sensing procedure. In some examples, the first channel sensing procedure is for the MT role, and the second channel sensing procedure is for the DU role. In some implementations, IAB node 705 may perform the first channel sensing procedure at a first antenna panel associated with the MT role, and IAB node 705 may perform the second channel sensing procedure at a second antenna panel associated with the DU role. As a result of measuring or determining that a first ED value measured at the first antenna panel satisfies a first value associated with the first channel sensing procedure (e.g., a first ED threshold), IAB node 705 may determine the success of the first channel sensing procedure, and as a result of measuring or determining that a second ED value measured at the second antenna panel satisfies a second value associated with the second channel sensing procedure (e.g., a second ED threshold), IAB node 705 may determine the success of the second channel sensing procedure. In some implementations, IAB node 705 may use one or more sensing beams to perform at least one of the first or second channel sensing procedures.

[0156] At 745, IAB node 705 can initiate a Channel Detection Operation (COT) for a first radio role (MT role) based on a first channel sensing process or for a second radio role (DU role) based on a second channel sensing process. For example, as a result of performing a separate channel sensing process at 740, IAB node 705 can measure or determine that the channel is idle (available) and can initiate a COT for transmissions via the MT role or the DU role, or both, from IAB node 705. IAB node 705 can initiate a COT for transmissions via one of the MT role or the DU role, can initiate a COT for transmissions via the MT role that can be shared with transmissions via the DU role, can initiate a COT for transmissions via the DU role that can be shared with transmissions via the MT role, or can initiate a COT for transmissions via both the MT role and the DU role (for simultaneous transmissions via the MT and DU roles, or for transmissions from one of the MT role or the DU role, and then from the other).

[0157] At 750, in some embodiments, IAB node 705 may send a first transmission via the MT role during COT. In some examples, IAB node 705 may send the first transmission to parent node 710 via the MT role. Additionally or alternatively, at 755, in some embodiments, IAB node 705 may send a second transmission via the DU role during COT. In some examples, IAB node 705 may send the second transmission to child node 715 via the DU role.

[0158] Figure 8 An example process flow 800 is shown to support a channel sensing process for communication at an IAB node. In some examples, process flow 800 may implement aspects of wireless communication system 100 or IAB network 200. Process flow 800 may illustrate communication between IAB node 805 and parent node 810, which may be an example of a parent IAB node or an IAB donor node. IAB node 805 and parent node 810 (parent IAB node or IAB donor node) may be references Figure 1-7 Examples of the corresponding devices described. In some examples, IAB node 805 may perform separate channel sensing procedures for transmissions via the MT role and DU role of IAB node 805. Alternative examples are possible, some of which may be performed in a different order than described or not at all. In some implementations, the procedures may include additional features not mentioned below, or further procedures may be added.

[0159] In some implementations, at 815, IAB node 805 may receive indications of a first value (e.g., a first ED threshold) and a second value (e.g., a second ED threshold) from parent node 810. In some examples, IAB node 805 may receive indications of the first and second ED thresholds as absolute values. For example, IAB node 805 may receive multiple bits or bit streams corresponding to the absolute values ​​of each of the first and second ED thresholds. In some other examples, IAB node 805 may receive indications of the first and second ED thresholds as offset values ​​relative to default values, and the first and second ED thresholds may be determined using the offset values ​​and the default values. For example, IAB node 805 may receive an indication of a first offset value relative to a default value (such as a default ED threshold), and the first ED threshold may be calculated or determined as a result of addition, subtraction, or performing some other mathematical operation including the first offset value and the default value. IAB node 805 may similarly calculate or determine the second ED threshold. In some other examples, IAB node 805 may receive a first ED threshold and a second ED threshold as indications of offset values ​​relative to the indicated parameters, and may use the offset values ​​and the indicated parameters to calculate or determine the first ED threshold and the second ED threshold. For example, parent node 810 may indicate parameters other than the first offset value, and IAB node 805 may calculate or determine the first ED threshold as a result of addition, subtraction, or performing some other mathematical operation involving the first offset value and the indicated parameters. IAB node 805 may similarly calculate or determine the second ED threshold. In the example where IAB node 805 receives indications of the first ED threshold and the second ED threshold from parent node 810, IAB node 805 may receive the indication as one or more of an F1 AP message, RRC message, MAC-CE, or DCI.

[0160] At 820, IAB node 805 can identify a first value (first ED threshold) of a first channel sensing procedure associated with a first radio role (MT role) and a second value (second ED threshold) of a second channel sensing procedure associated with a second radio role (DU role). In some examples, IAB node 805 can select, calculate, or determine the first ED threshold and the second ED threshold based on an instruction received at 815. In some other examples, IAB node 805 can determine the first ED threshold and the second ED threshold based on conditions at IAB node 805 or the configuration of individual channel sensing procedures. For example, IAB node 805 can determine a first ED threshold and a second ED threshold based on whether the ED threshold is for one or more of the following thresholds: a threshold for channel sensing procedures for incoming transmissions via the MT role, a threshold for channel sensing procedures for incoming transmissions via the DU role, a threshold for the DU role of IAB node 805 to share an initiated COT with a co-located MT, a threshold for the MT role of IAB node 805 to share an initiated COT with a co-located DU, a separate threshold associated with different sets of sensed beams, a separate threshold associated with different sets of beam pairs (e.g., different unique pairs of sensed beams and transmit beams), or a separate threshold for a radio role in the presence of transmissions from another radio role and the absence of transmissions from another radio role. In some examples, the first ED threshold may differ from the second ED threshold because the MT role and the DU role may have different maximum transmit powers or different beam patterns, or both.

[0161] At 825, IAB node 805 can perform at least one of a first channel sensing procedure or a second channel sensing procedure. In some examples, IAB node 805 can use a first sensing beamset to perform the first channel sensing procedure and can use a second sensing beamset to perform the second channel sensing procedure. In such examples, IAB node 805 can use a first ED threshold associated with the first sensing beamset and a second ED threshold associated with the second sensing beamset. In some other examples, IAB node 805 can use a first beam pair to perform the first channel sensing procedure and can use a second beam pair to perform the second channel sensing procedure. In such examples, IAB node 805 can use a first ED threshold associated with the first beam pair and can use a second ED threshold associated with the second beam pair. In some other examples, during sensing time slots where there is no transmission via other radio roles of IAB node 805, IAB node 805 can perform either the first channel sensing procedure or the second channel sensing procedure, or both. In such an example, IAB node 805 may use a first ED threshold or a second ED threshold, or both, associated with the absence of transmissions via other radio roles connected to IAB node 805. In some other examples, during a sensing time slot where transmissions via other radio roles connected to IAB node 805 are present, IAB node 805 may perform a first channel sensing procedure or a second channel sensing procedure, or both. In such an example, IAB node 805 may use a first ED threshold or a second ED threshold, or both, associated with the presence of transmissions via other radio roles connected to IAB node 805.

[0162] At 830, the IAB node measures or otherwise determines whether at least one ED value associated with the channel satisfies at least one of a first value (first ED threshold) or a second value (second ED threshold). In some examples, IAB node 805 may measure or determine a first ED value as a result of a first channel sensing process and may compare the first ED value with a first ED threshold associated with the first channel sensing process to determine whether the first ED value satisfies (is less than or equal to) the first ED threshold. Similarly, IAB node 805 may measure or determine a second ED value as a result of a second channel sensing process and may compare the second ED value with a second ED threshold associated with the second channel sensing process to determine whether the second ED value satisfies (is less than or equal to) the second ED threshold. IAB node 805 may measure or determine an ED value as a result of measuring the channel during the measurement region of a sensing time slot, and the measured ED value may be associated with or related to a sensing beamset associated with the channel sensing process, a beam pair associated with the channel sensing process, transmissions via other radio roles present during the channel sensing process, or any combination thereof.

[0163] In 835, IAB node 805 may select, configure, or otherwise determine whether to initiate a COT for at least one of a first radio role (MT role) or a second radio role (DU role) based at least in part on measuring or determining whether at least one ED value associated with the channel satisfies at least one of a first value (first ED threshold) or a second value (second ED threshold). In some examples, if the first ED value satisfies the first ED threshold, IAB node 805 may initiate a COT for transmissions via the MT role, and if the second ED value satisfies the second ED threshold, IAB node 805 may initiate a COT for transmissions via the DU role. IAB node 805 can initiate a COT for a transmission via either the MT role or the DU role, can initiate a COT for a transmission via the MT role that can be shared with a transmission via the DU role, can initiate a COT for a transmission via the DU role that can be shared with a transmission via the MT role, or can initiate a COT for a transmission via both the MT role and the DU role (for simultaneous transmissions via the MT and DU roles, or for a transmission from one of the MT role or the DU role, and then from the other).

[0164] Figure 9 A block diagram of an example device 905 supporting a channel sensing process for communication at an IAB node is shown. Device 905 may be an example of or include components of an IAB node as described herein. In some examples, device 905 may be an example of or include components of a wireless device or wireless device apparatus as described herein. Device 905 may include components for bidirectional voice and data communication, including components for transmitting and receiving communication, including a communication manager 910, an input / output (I / O) controller 915, a transceiver 920, an antenna 925, a memory 930, a processor 940, and a codec manager 950. These components may communicate electronically via one or more buses (e.g., bus 945).

[0165] I / O controller 915 can manage the input and output signals of device 905. I / O controller 915 can also manage peripheral devices not integrated into device 905. In some examples, I / O controller 915 can represent a physical connection or port to an external peripheral device. In some examples, I / O controller 915 can utilize, for example... Or another known operating system. In some other examples, the I / O controller 915 may be represented or interacted with using a modem, keyboard, mouse, touchscreen, or similar device. In some examples, the I / O controller 915 may be implemented as part of a processor. In some examples, a user may interact with the device 905 via the I / O controller 915 or via hardware components controlled by the I / O controller 915.

[0166] Transceiver 920 can communicate bidirectionally via one or more antennas, wired or wireless links, as described throughout. For example, transceiver 920 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 920 may also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and for demodulating packets received from the antenna.

[0167] In some examples, the wireless device may include a single antenna 925. In such examples, device 905 may use a single antenna 925 to communicate via both a first wireless role (e.g., the MT role of device 905) and a second wireless role (e.g., the DU role of device 905). However, in some examples, the device may have more than one antenna 925, which may be able to transmit or receive multiple wireless transmissions simultaneously. In such examples, device 905 may use the first antenna 925 to communicate via the first wireless role (e.g., the MT role of device 905) and may use the second antenna 925 to communicate via the second wireless role (e.g., the DU role of device 905).

[0168] Memory 930 may include random access memory (RAM) and read-only memory (ROM). Memory 930 may store computer-readable, computer-executable code 935, which includes instructions that, when executed, cause the processor to perform the various functions described herein. In some examples, memory 930 may include a basic I / O system (BIOS), which controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0169] Processor 940 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in device 905 (such as in memory 930). In some embodiments, processor 940 may be a component of a processing system. A processing system generally refers to a system or series of machines or components that receives input and processes it to produce a set of outputs that can be passed to, for example, other systems or components of device 905. For example, the processing system of device 905 may refer to a system that includes various other components or sub-components of device 905.

[0170] The processing system of device 905 can interface with other components of device 905 and can process information (such as inputs or signals) received from other components or output information to other components. For example, the chip or modem of device 905 may include a processing system, a first interface for outputting information, and a second interface for acquiring information. In some embodiments, the first interface may refer to the interface between the processing system of the chip or modem and a transmitter, allowing device 905 to transmit information output from the chip or modem. In some embodiments, the second interface may refer to the interface between the processing system of the chip or modem and a receiver, allowing device 905 to receive information or signal input, and this information can be transmitted to the processing system. Those skilled in the art will readily recognize that the first interface can also receive information or signal input, and the second interface can also output information or signal output.

[0171] In some examples, the communication manager 910, if acting as or in conjunction with a processor or processing system, can output signaling for transmission via at least one of a first or second wireless role during COT. For example, the communication manager 910 can output signaling to the transceiver 920 for transmission via at least one of a first or second wireless role during COT. Similarly, the communication manager 910 can also obtain signaling (e.g., messages, indications, or any other signatures that can be sent to the device 905) from the transceiver 920. For example, the communication manager 910 can obtain from the transceiver 920 the configuration of a separate channel sensing procedure or an indication of an ED threshold, or both.

[0172] In some examples, the communication manager 910 may be implemented as an integrated circuit or chipset for a device modem, and the receiver and transmitter may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled to the device modem to enable wireless transmission and reception on one or more frequency bands.

[0173] According to the examples disclosed herein, device 905 may support wireless communication at a wireless device device. Communication manager 910 may be configured or otherwise support components for establishing a first wireless role and a second wireless role for the wireless device device, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. In some examples, communication manager 910 may be configured or otherwise support components for performing at least one of a first channel sensing process or a second channel sensing process at the wireless device device, wherein the first channel sensing process is for the first wireless role and the second channel sensing process is for the second wireless role. In some examples, communication manager 910 may be configured or otherwise support components for initiating a COT at the wireless device device based on the first channel sensing process for the first wireless role or based on the second channel sensing process for the second wireless role, or both. In some examples, communication manager 910 may be configured or otherwise support components for transmitting via at least one of the first wireless role or the second wireless role during a COT.

[0174] In some examples, to support the execution of at least one of a first channel sensing process or a second channel sensing process at a wireless device, the communication manager 910 may be configured or otherwise support components for performing a first channel sensing process at a first antenna panel associated with a first wireless role. In some examples, to support the execution of at least one of a first channel sensing process or a second channel sensing process at a wireless device, the communication manager 910 may be configured or otherwise support components for performing a second channel sensing process at a second antenna panel associated with a second wireless role.

[0175] In some examples, the communication manager 910 may be configured or otherwise supported to include components for determining the success of a first channel sensing process based on a first ED value associated with a first antenna panel and a first value associated with a first channel sensing process, wherein the first ED value satisfies the first value. In some examples, the communication manager 910 may be configured or otherwise supported to include components for determining the success of a second channel sensing process based on a second ED value associated with a second antenna panel and a second value associated with a second channel sensing process, wherein the second ED value satisfies the second value.

[0176] In some examples, in order to support the execution of at least one of a first channel sensing process or a second channel sensing process at a wireless device, the communication manager 910 may be configured or otherwise support components for performing the first channel sensing process and the second channel sensing process at the antenna panel of a wireless device associated with a first wireless role.

[0177] In some examples, the communication manager 910 may be configured or otherwise supported to determine the success of a first channel sensing process based on an ED value associated with an antenna panel and a first value associated with a first channel sensing process, wherein the ED value satisfies the first value. In some examples, the communication manager 910 may be configured or otherwise supported to determine the success of a second channel sensing process based on an ED value associated with an antenna panel and a second value associated with a second channel sensing process, wherein the ED value satisfies the second value.

[0178] In some examples, in order to support the execution of at least one of a first channel sensing process or a second channel sensing process at a wireless device, the communication manager 910 may be configured or otherwise support components for performing the first channel sensing process and the second channel sensing process at the antenna panel of a wireless device associated with a second wireless role.

[0179] In some examples, the communication manager 910 may be configured or otherwise supported to determine the success of a first channel sensing process based on an ED value associated with an antenna panel and a first value associated with a first channel sensing process, wherein the ED value satisfies the first value. In some examples, the communication manager 910 may be configured or otherwise supported to determine the success of a second channel sensing process based on an ED value associated with an antenna panel and a second value associated with a second channel sensing process, wherein the ED value satisfies the second value.

[0180] In some examples, to support the execution of at least one of a first channel sensing process or a second channel sensing process at a wireless device, the communication manager 910 may be configured or otherwise support components for determining one or more sensing beams associated with at least one of the first channel sensing process or the second channel sensing process. In some examples, to support the execution of at least one of the first channel sensing process or the second channel sensing process at a wireless device, the communication manager 910 may be configured or otherwise support components for performing at least one of the first channel sensing process or the second channel sensing process using one or more sensing beams.

[0181] In some examples, in order to support transmission by a wireless device during COT via at least one of a first wireless role or a second wireless role, the communication manager 910 may be configured or otherwise support components for transmission via one or more transmission beams.

[0182] In some examples, the communication manager 910 may be configured or otherwise support components for transmitting sensing capabilities from a wireless device to a parent node or central unit, wherein a first channel sensing process for a first wireless role and a second channel sensing process for a second wireless role are performed based on the sensing capabilities.

[0183] In some examples, the sensing capability includes an indication that the wireless device, as a plurality of nodes, performs a first channel sensing procedure for a first wireless role and a second channel sensing procedure for a second wireless role. In some examples, the sensing capability includes an indication of whether the wireless device is capable of performing at least one of the first channel sensing procedure when transmitted via the second wireless role or when transmitted via the first wireless role. In some examples, the wireless device may transmit the sensing capability via an F1-AP message, an RRC message, or a MAC-CE.

[0184] In some examples, to support transmissions during COT via at least one of a first wireless role or a second wireless role, the communication manager 910 may be configured or otherwise supported to support components for determining the duplex capability of the wireless device, the success of the first channel sensing process, and the success of the second channel sensing process. In some examples, to support transmissions during COT via at least one of a first wireless role or a second wireless role, the communication manager 910 may be configured or otherwise supported to support components for determining whether to transmit at least one of a first transmission from the wireless device via the first wireless role or a second transmission from the wireless device via the second wireless role, based on the duplex capability of the wireless device, the success of the first channel sensing process, and the success of the second channel sensing process.

[0185] In some examples, the communication manager 910 may be configured or otherwise support components for determining a first transmission timing of a first transmission from a wireless device via a first wireless role and a second transmission timing of a second transmission from a wireless device via a second wireless role. In some examples, the communication manager 910 may be configured or otherwise support components for determining a first sensing time slot for performing a first channel sensing procedure and a second sensing time slot for performing a second channel sensing procedure, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission and the second sensing time slot is aligned with the second transmission timing of the second transmission.

[0186] In some examples, the communication manager 910 may be configured or otherwise support components for determining whether a wireless device device meets an interference metric. In some examples, to support the determination that a wireless device device meets an interference metric, the communication manager 910 may be configured or otherwise support components for applying signal processing techniques to at least one of a first sensing time slot or a second sensing time slot.

[0187] In some examples, to support the execution of at least one of a first channel sensing process or a second channel sensing process at the wireless device, the communication manager 910 may be configured or otherwise support components for performing a first channel sensing process during a first measurement region within a first sensing time slot, wherein the first measurement region has a first duration. In some examples, to support the execution of at least one of a first channel sensing process or a second channel sensing process at the wireless device, the communication manager 910 may be configured or otherwise support components for performing a second channel sensing process during a second measurement region within a second sensing time slot, wherein the second measurement region has a second duration less than the first duration.

[0188] In some examples, the first duration is equal to four microseconds, and the second duration is less than four microseconds. In some examples, the first and second measurement regions are aligned in time.

[0189] In some examples, to support the execution of at least one of a first channel sensing process or a second channel sensing process at a wireless device, the communication manager 910 may be configured or otherwise support components for performing a first channel sensing process during a first measurement region of a first sensing window, wherein the first sensing window includes a first sensing time slot, and wherein the first sensing time slot includes a first portion of the first measurement region. In some examples, to support the execution of at least one of a first channel sensing process or a second channel sensing process at a wireless device, the communication manager 910 may be configured or otherwise support components for performing a second channel sensing process during a second measurement region of a second sensing window, wherein the second sensing window includes a second sensing time slot, and wherein the second sensing time slot includes a second portion of the second measurement region, the second portion of the second measurement region including a shorter duration than the first portion of the first measurement region.

[0190] In some examples, a first portion of the first measurement region comprises at least four microseconds, and a second portion of the second measurement region comprises less than four microseconds. In some examples, the first sensing time slot at least partially overlaps with the second sensing time slot.

[0191] In some examples, the communication manager 910 may be configured or otherwise support components for determining a first transmission timing of a first transmission from a wireless device via a first wireless role and a second transmission timing of a second transmission from a wireless device via a second wireless role. In some examples, the communication manager 910 may be configured or otherwise support components for determining a first sensing time slot for performing a first channel sensing procedure and a second sensing time slot for performing a second channel sensing procedure, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is offset based on the first transmission timing of the first transmission and the second transmission timing of the second transmission.

[0192] In some examples, the communication manager 910 may be configured or otherwise supported to determine that a wireless device device has failed to meet an interference metric, wherein the second sensing time slot is based on the offset between the first transmission timing of the first transmission and the second transmission timing of the second transmission, based on the determination that the wireless device device has failed to meet the interference metric.

[0193] In some examples, the timing of the first transmission of the first transmission is within a threshold duration of the timing of the second transmission of the second transmission. In some examples, the first sensing time slot and the second sensing time slot avoid overlapping with either the first transmission or the second transmission.

[0194] In some examples, the communication manager 910 may be configured or otherwise support components for determining a first transmission timing of a first transmission from a wireless device via a first wireless role and a second transmission timing of a second transmission from a wireless device via a second wireless role. In some examples, the communication manager 910 may be configured or otherwise support components for determining a first sensing time slot for performing a first channel sensing procedure. In some examples, the communication manager 910 may be configured or otherwise support components for avoiding the performance of a second channel sensing procedure.

[0195] In some examples, the timing of the first transmission of the first transmission is within a threshold duration of the timing of the second transmission of the second transmission. In some examples, the second transmission is less than the threshold duration.

[0196] In some examples, the communication manager 910 may be configured or otherwise support components for determining a first transmission timing of a first transmission from a wireless device via a first wireless role and a second transmission timing of a second transmission from a wireless device via a second wireless role. In some examples, the communication manager 910 may be configured or otherwise support components for adding a padding signal to the start of the second transmission, wherein the first transmission timing precedes the second transmission timing by a duration equal to the duration of the padding signal. In some examples, the communication manager 910 may be configured or otherwise support components for determining a first sensing time slot for performing a first channel sensing procedure and a second sensing time slot for performing a second channel sensing procedure, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is aligned with the padding signal.

[0197] In some examples, the communication manager 910 may be configured or otherwise support components for receiving configurations for performing a first channel sensing procedure and a second channel sensing procedure at a wireless device device.

[0198] In some examples, the wireless device may receive configuration via F1-AP messages, RRC messages, MAC-CE, or DCI. In some examples, the wireless device is an IAB node, and in some examples, the first wireless role includes the MT role, and the second wireless role includes the DU role.

[0199] Additionally or alternatively, according to the examples disclosed herein, device 905 may support wireless communication at a wireless device apparatus. In some examples, communication manager 910 may be configured or otherwise supported to support components for identifying a first value of a first channel sensing process associated with a first wireless role of the wireless device apparatus and a second value of a second channel sensing process associated with a second wireless role of the wireless device apparatus. In some examples, communication manager 910 may be configured or otherwise supported to support components for determining whether at least one ED value associated with a channel satisfies at least one of the first value or the second value. In some examples, communication manager 910 may be configured or otherwise supported to support components for determining whether to initiate a COT for at least one of the first wireless role or the second wireless role based on whether at least one ED value associated with a channel satisfies at least one of the first value or the second value.

[0200] In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for determining whether an ED value satisfies a first value, wherein determining whether to initiate a COT for a first radio role is based on determining whether the ED value satisfies the first value.

[0201] In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for determining whether an ED value satisfies a second value, wherein determining whether to initiate a COT for a second wireless role is based on determining whether the ED value satisfies the second value.

[0202] In some examples, the communication manager 910 may be configured or otherwise support components for determining an ED value based on a first channel sensing process. In some examples, the communication manager 910 may be configured or otherwise support components for determining that the ED value satisfies a first value. In some examples, the communication manager 910 may be configured or otherwise support components for initiating a COT for a first wireless role based on the determination that the ED value satisfies the first value. In some examples, the communication manager 910 may be configured or otherwise support components for determining that the ED value satisfies a second value. In some examples, the communication manager 910 may be configured or otherwise support components for including one or more transmissions from a wireless device via a second wireless node within the COT initiated for the first wireless role based on the determination that the ED value satisfies the second value.

[0203] In some examples, the communication manager 910 may be configured or otherwise support components for determining an ED value based on a second channel sensing process. In some examples, the communication manager 910 may be configured or otherwise support components for determining that the ED value satisfies a second value. In some examples, the communication manager 910 may be configured or otherwise support components for initiating a COT for a second wireless role based on the determination that the ED value satisfies the second value. In some examples, the communication manager 910 may be configured or otherwise support components for determining that the ED value satisfies a first value. In some examples, the communication manager 910 may be configured or otherwise support components for including one or more transmissions from a wireless device device via a first wireless node within a COT initiated for a second wireless role based on the determination that the ED value satisfies the first value.

[0204] In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for performing a first channel sensing process using a set of sensing beams. In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for determining whether an ED value satisfies a first value, where the first value is for a first channel sensing process using a set of sensing beams.

[0205] In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for performing a second channel sensing process using a set of sensing beams. In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for determining whether an ED value satisfies a second value, wherein the second value is for a second channel sensing process using a set of sensing beams.

[0206] In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for performing a first channel sensing process using a beam pair. In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for determining whether an ED value satisfies a first value, where the first value is for a first channel sensing process using a beam pair.

[0207] In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for performing a second channel sensing process using beam pairs. In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for determining whether an ED value satisfies a second value, wherein the second value is for a second channel sensing process using beam pairs.

[0208] In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for performing at least one of a first channel sensing process or a second channel sensing process during a sensing time slot in which there is no transmission from the wireless device. In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for determining at least one ED value based on performing at least one of a first channel sensing process or a second channel sensing process during a sensing time slot in which there is no transmission from the wireless device.

[0209] In some examples, in order to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for determining whether at least one ED value satisfies at least one of a first value or a second value, wherein the first value is for a first channel sensing process during a sensing time slot in which there is no transmission from the wireless device, and the second value is for a second channel sensing process during a sensing time slot in which there is no transmission from the wireless device.

[0210] In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for performing at least one of a first channel sensing process during a first sensing time slot including transmissions via a second wireless role of the wireless device or a second channel sensing process during a second sensing time slot including transmissions via a first wireless role of the wireless device. In some examples, to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for determining at least one ED value based on at least one of performing a first channel sensing process during a first sensing time slot including transmissions via a second wireless role of the wireless device or a second channel sensing process during a second sensing time slot including transmissions via a first wireless role of the wireless device.

[0211] In some examples, in order to support determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value, the communication manager 910 may be configured or otherwise support components for determining whether at least one ED value satisfies at least one of a first value or a second value, wherein the first value is for a first channel sensing process during a first sensing time slot including transmission via a second wireless role of a wireless device, and the second value is for a second channel sensing process during a second sensing time slot including transmission via a first wireless role of a wireless device.

[0212] In some examples, the communication manager 910 may be configured or otherwise support components for identifying a first value based on a first category of a first wireless role and a second value based on a second category of a second wireless role.

[0213] In some examples, the first category of the first wireless role includes at least one of a wide area class or a local area class. In some examples, to support the identification of the first and second values, the communication manager 910 may be configured or otherwise support components for receiving the first and second values ​​as indications of one or more of an F1-AP message, an RRC message, a MAC-CE message, or a DCI message. In some examples, to support the identification of the first and second values, the communication manager 910 may be configured or otherwise support components for receiving the first and second values ​​as indications of absolute values.

[0214] In some examples, to support the identification of a first value and a second value, the communication manager 910 may be configured or otherwise supported to include components for receiving at least one of the first value or the second value as an indication of an offset value relative to a default value. In some examples, to support the identification of a first value and a second value, the communication manager 910 may be configured or otherwise supported to include components for determining at least one of the first value or the second value based on the offset value and the default value.

[0215] In some examples, to support the identification of the first and second values, the communication manager 910 may be configured or otherwise supported to include components for receiving at least one of the first or second values ​​as an indication of an offset value relative to the indicated parameter. In some examples, to support the identification of the first and second values, the communication manager 910 may be configured or otherwise supported to include components for determining at least one of the first or second values ​​based on the offset value and the indicated parameter.

[0216] In some examples, the wireless device is an IAB node, and in some examples, the first wireless role includes the MT role, and the second wireless role includes the DU role.

[0217] In some implementations, the communication manager 910 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise cooperating with the transceiver 920, one or more antennas 925, or any combination thereof. Although the communication manager 910 is shown as a separate component, in some implementations, one or more functions described with reference to the communication manager 910 may be supported or performed by the processor 940, memory 930, code 935, or any combination thereof. For example, code 935 may include instructions executable by the processor 940 to cause the device 905 to perform various aspects of the channel sensing process for communication at an IAB node as described herein, or the processor 940 and memory 930 may be otherwise configured to perform or support such operations.

[0218] The communication manager 910 described herein can be implemented to achieve one or more potential advantages. In some embodiments, the communication manager 910 can perform separate channel sensing procedures for transmissions from device 905 via the MT role and DU role. In some examples, as a result of performing separate channel sensing procedures for transmissions via the MT role and DU role, where the MT role and DU role use separate antenna panels of device 905 or otherwise have different RF footprints, device 905 can reliably and accurately obtain channel access. As a result of performing reliable channel sensing procedures, transmissions from device 905 via the MT role and DU role may have a lower probability of being adversely affected by interference, which may lead to a greater probability that the receiving device will successfully receive transmissions from device 905.

[0219] Therefore, device 905 can potentially perform fewer retransmissions, which can lead to greater spectral efficiency, less overhead, and higher data rates to and from device 905. Furthermore, as a result of achieving higher data rates and potentially fewer retransmissions, device 905 can spend less time transmitting, and thus, device 905 can enter sleep mode more frequently or for longer periods, which can improve power savings and increase battery life at device 905.

[0220] Figure 10 A flowchart illustrating an example method 1000 for supporting channel sensing procedures at IAB nodes is shown. Operation of method 1000 can be implemented by the device or its components described herein. For example, operation of method 1000 can be provided by a reference... Figure 9 The communication manager described below is used for execution. In some examples, the device can execute a set of instructions to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.

[0221] At 1005, the device can establish a first wireless role and a second wireless role for the wireless device, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. The operation of 1005 can be performed according to the method described herein.

[0222] In 1010, the device may perform at least one of a first channel sensing process or a second channel sensing process at a wireless device device, wherein the first channel sensing process is for a first wireless role and the second channel sensing process is for a second wireless role. The operation of 1010 may be performed according to the method described herein.

[0223] In 1015, the device can initiate COT at the wireless device location for a first wireless role based on a first channel sensing process, or for a second wireless role based on a second channel sensing process, or both. The operation of 1015 can be performed according to the methods described herein.

[0224] In 1020, the device can transmit via at least one of a first wireless role or a second wireless role during COT. Operation of 1020 can be performed according to the methods described herein.

[0225] Figure 11 A flowchart illustrating an example method 1100 for supporting channel sensing procedures at IAB nodes is shown. Operation of method 1100 can be implemented by the device or its components described herein. For example, operation of method 1100 can be provided by a reference... Figure 9 The communication manager described below is used for execution. In some examples, the device can execute a set of instructions to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.

[0226] At 1105, the device can establish a first wireless role and a second wireless role for the wireless device, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. The operation of 1105 can be performed according to the methods described herein.

[0227] In 1110, the device can transmit sensing capabilities to the parent node or central unit via a wireless device. The operation of 1110 can be performed according to the method described herein.

[0228] At 1115, the device may perform at least one of a first channel sensing procedure or a second channel sensing procedure at the wireless device apparatus, wherein the first channel sensing procedure is for a first wireless role and the second channel sensing procedure is for a second wireless role. In some examples, the execution of the first channel sensing procedure for the first wireless role and the second channel sensing procedure for the second wireless role is based on sensing capabilities. The operation of 1115 may be performed according to the methods described herein.

[0229] At 1120, the device can initiate COT at the wireless device apparatus for a first wireless role based on a first channel sensing process, or for a second wireless role based on a second channel sensing process, or both. The operation of 1120 can be performed according to the methods described herein.

[0230] In 1125, the device may transmit via at least one of a first wireless role or a second wireless role during COT. Operation of 1125 may be performed according to the methods described herein.

[0231] Figure 12 A flowchart illustrating an example method 1200 for supporting channel sensing procedures at IAB nodes is shown. Operation of method 1200 can be implemented by the device or its components described herein. For example, operation of method 1200 can be provided by reference... Figure 9 The communication manager described below is used for execution. In some examples, the device can execute a set of instructions to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.

[0232] At 1205, the device can establish a first wireless role and a second wireless role for the wireless device, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. The operation of 1205 can be performed according to the methods described herein.

[0233] In 1210, the device can determine a first transmission timing for a first transmission from a wireless device via a first wireless role and a second transmission timing for a second transmission from a wireless device via a second wireless role. Operation of 1210 can be performed according to the method described herein.

[0234] At 1215, the device can determine a first sensing time slot for performing a first channel sensing procedure and a second sensing time slot for performing a second channel sensing procedure, wherein the first sensing time slot is aligned with a first transmission timing of a first transmission, and the second sensing time slot is aligned with a second transmission timing of a second transmission. The operation of 1215 can be performed according to the method described herein.

[0235] At 1220, the device may perform at least one of a first channel sensing procedure or a second channel sensing procedure at the wireless device apparatus, wherein the first channel sensing procedure is for a first wireless role and the second channel sensing procedure is for a second wireless role. Operation of 1220 may be performed according to the methods described herein.

[0236] In 1225, the device can initiate a COT at the wireless device apparatus for a first wireless role based on a first channel sensing process or for a second wireless role based on a second channel sensing process, or both. The operation of 1225 can be performed according to the methods described herein.

[0237] At 1230, the device may transmit via at least one of the first or second wireless roles during COT. Operation of 1230 may be performed according to the methods described herein.

[0238] Figure 13A flowchart illustrating an example method 1300 for supporting channel sensing procedures at IAB nodes is shown. Operation of method 1300 can be implemented by the device or its components described herein. For example, operation of method 1300 can be provided by reference to... Figure 9 The communication manager described below is used for execution. In some examples, the device can execute a set of instructions to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.

[0239] At 1305, the device can establish a first wireless role and a second wireless role for the wireless device, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. Operation of 1305 can be performed according to the methods described herein.

[0240] In 1310, the device can determine a first transmission timing for a first transmission from a wireless device via a first wireless role and a second transmission timing for a second transmission from a wireless device via a second wireless role. Operation of 1310 can be performed according to the method described herein.

[0241] At 1315, the device can determine a first sensing time slot for performing a first channel sensing procedure and a second sensing time slot for performing a second channel sensing procedure, wherein the first sensing time slot is aligned with a first transmission timing of a first transmission, and the second sensing time slot is offset from a second transmission timing of a second transmission based on the first transmission timing of the first transmission. The operation of 1315 can be performed according to the method described herein.

[0242] At 1320, the device may perform at least one of a first channel sensing procedure or a second channel sensing procedure at a wireless device apparatus, wherein the first channel sensing procedure is for a first wireless role and the second channel sensing procedure is for a second wireless role. Operation of 1320 may be performed according to the methods described herein.

[0243] In 1325, the device can initiate a COT at the wireless device apparatus for a first wireless role based on a first channel sensing process or for a second wireless role based on a second channel sensing process, or both. Operation of 1325 can be performed according to the methods described herein.

[0244] In 1330, the device may transmit via at least one of a first radio role or a second radio role during COT. Operation of 1330 may be performed according to the methods described herein.

[0245] Figure 14A flowchart illustrating an example method 1400 for supporting channel sensing procedures at IAB nodes is shown. Operation of method 1400 can be implemented by the device or its components described herein. For example, operation of method 1400 can be provided by reference... Figure 9 The communication manager described below is used for execution. In some examples, the device can execute a set of instructions to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.

[0246] At 1405, the device can establish a first wireless role and a second wireless role for the wireless device, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. Operation of 1405 can be performed according to the methods described herein.

[0247] In 1410, the device can determine a first transmission timing for a first transmission from a wireless device via a first wireless role and a second transmission timing for a second transmission from a wireless device via a second wireless role. Operation of 1410 can be performed according to the method described herein.

[0248] At 1415, the device can determine a first sensing time slot for performing the first channel sensing procedure. The operation of 1415 can be performed according to the method described herein.

[0249] At 1420, the device may perform at least one of a first channel sensing procedure or a second channel sensing procedure at the wireless device apparatus, wherein the first channel sensing procedure is for a first wireless role and the second channel sensing procedure is for a second wireless role. Operation of 1420 may be performed according to the methods described herein.

[0250] At 1425, the device can avoid performing the second channel sensing process. The operation of 1425 can be performed according to the method described herein.

[0251] At 1430, the device may initiate a COT at the wireless device apparatus for a first wireless role based on a first channel sensing process or for a second wireless role based on a second channel sensing process, or both. The operation of 1430 may be performed according to the methods described herein.

[0252] In step 1435, the device may transmit via at least one of a first radio role or a second radio role during COT. Operation of step 1435 may be performed according to the methods described herein.

[0253] Figure 15A flowchart illustrating an example method 1500 for supporting channel sensing procedures at IAB nodes is shown. Operation of method 1500 can be implemented by the device or its components described herein. For example, operation of method 1500 can be provided by reference... Figure 9 The communication manager described below is used for execution. In some examples, the device can execute a set of instructions to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.

[0254] At 1505, the device can establish a first wireless role and a second wireless role for the wireless device, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. The operation of 1505 can be performed according to the methods described herein.

[0255] In 1510, the device can determine a first transmission timing for a first transmission from a wireless device via a first wireless role and a second transmission timing for a second transmission from a wireless device via a second wireless role. Operation of 1510 can be performed according to the method described herein.

[0256] In 1515, the device may add a padding signal to the beginning of the second transmission, wherein the first transmission timing precedes the second transmission timing by a certain duration equal to the duration of the padding signal. The operation of 1515 may be performed according to the method described herein.

[0257] At 1520, the device can determine a first sensing time slot for performing a first channel sensing procedure and a second sensing time slot for performing a second channel sensing procedure, wherein the first sensing time slot is aligned with a first transmission timing of a first transmission, and the second sensing time slot is aligned with a padding signal. Operation of 1520 can be performed according to the method described herein.

[0258] At 1525, the device may perform at least one of a first channel sensing procedure or a second channel sensing procedure at the wireless device apparatus, wherein the first channel sensing procedure is for a first wireless role and the second channel sensing procedure is for a second wireless role. Operation of 1525 may be performed according to the methods described herein.

[0259] At 1530, the device can initiate COT at the wireless device apparatus for a first wireless role based on a first channel sensing process or for a second wireless role based on a second channel sensing process, or both. Operation of 1530 can be performed according to the methods described herein.

[0260] In 1535, the device can transmit via at least one of a first wireless role or a second wireless role during COT. Operation of 1535 can be performed according to the methods described herein.

[0261] Figure 16 A flowchart illustrating an example method 1600 for supporting channel sensing procedures at IAB nodes is shown. Operation of method 1600 can be implemented by the device or its components described herein. For example, operation of method 1600 can be provided by reference... Figure 9 The communication manager described below is used for execution. In some examples, the device can execute a set of instructions to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.

[0262] At 1605, the device can identify a first value of a first channel sensing process associated with a first wireless role of the wireless device and a second value of a second channel sensing process associated with a second wireless role of the wireless device. Operation of 1605 can be performed according to the method described herein.

[0263] In 1610, the device can determine whether at least one ED value associated with the channel satisfies at least one of a first value or a second value. The operation of 1610 can be performed according to the method described herein.

[0264] In 1615, the device can determine whether to initiate a COT for at least one of a first radio role or a second radio role based on whether at least one ED value associated with the channel satisfies at least one of a first value or a second value. The operation of 1615 can be performed according to the methods described herein.

[0265] Figure 17 A flowchart illustrating an example method 1700 for supporting channel sensing procedures at IAB nodes is shown. Operation of method 1700 can be implemented by the device or its components described herein. For example, operation of method 1700 can be provided by reference... Figure 9 The communication manager described below is used for execution. In some examples, the device can execute a set of instructions to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.

[0266] At 1705, the device can identify a first value of a first channel sensing process associated with a first wireless role of the wireless device and a second value of a second channel sensing process associated with a second wireless role of the wireless device. Operation of 1705 can be performed according to the method described herein.

[0267] In 1710, the device can determine the ED value based on the first channel sensing process. The operation of 1710 can be performed according to the method described herein.

[0268] In step 1715, the device can determine whether the ED value meets the first value. The operation of step 1715 can be performed according to the method described herein.

[0269] In 1720, the device can determine whether to initiate a COT for at least one of a first radio role or a second radio role based on whether at least one ED value associated with the channel satisfies at least one of a first value or a second value. In some examples, determining whether to initiate a COT for the first radio role is based on determining whether the ED value satisfies the first value. The operation of 1720 can be performed according to the methods described herein.

[0270] Figure 18 A flowchart illustrating an example method 1800 for supporting channel sensing procedures at IAB nodes is shown. Operation of method 1800 can be implemented by the device or its components described herein. For example, operation of method 1800 can be provided by reference... Figure 9 The communication manager described below is used for execution. In some examples, the device can execute a set of instructions to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.

[0271] At 1805, the device can identify a first value of a first channel sensing process associated with a first wireless role of the wireless device and a second value of a second channel sensing process associated with a second wireless role of the wireless device. Operation of 1805 can be performed according to the method described herein.

[0272] In 1810, the device can determine the ED value based on the second channel sensing process. The operation of 1810 can be performed according to the method described herein.

[0273] In step 1815, the device can determine whether the ED value meets the second value. The operation of step 1815 can be performed according to the method described in this document.

[0274] In 1820, the device can determine whether to initiate a COT for at least one of a first radio role or a second radio role based on whether at least one ED value associated with the channel satisfies at least one of a first value or a second value. In some examples, determining whether to initiate a COT for the second radio role is based on determining whether the ED value satisfies the second value. The operation of 1820 can be performed according to the methods described herein.

[0275] The following provides an overview of some aspects of this disclosure:

[0276] Aspect 1: A method for wireless communication at a wireless device, comprising: establishing a first wireless role and a second wireless role for the wireless device, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication; performing at least one of a first channel sensing process or a second channel sensing process at the wireless device, wherein the first channel sensing process is for the first wireless role and the second channel sensing process is for the second wireless role; initiating a Communication over Time (COT) at the wireless device for the first wireless role according to the first channel sensing process or for the second wireless role according to the second channel sensing process or both; and transmitting via at least one of the first wireless role or the second wireless role during the COT.

[0277] Aspect 2: According to the method of aspect 1, performing at least one of the first channel sensing process or the second channel sensing process at the wireless device includes: performing the first channel sensing process at a first antenna panel associated with a first wireless role; and performing the second channel sensing process at a second antenna panel associated with a second wireless role.

[0278] Aspect 3: The method according to aspect 2 further includes: determining the success of the first channel sensing process based at least in part on a first ED value associated with the first antenna panel and a first value associated with the first channel sensing process, wherein the first ED value satisfies the first value; and determining the success of the second channel sensing process based at least in part on a second ED value associated with the second antenna panel and a second value associated with the second channel sensing process, wherein the second ED value satisfies the second value.

[0279] Aspect 4: According to the method of aspect 1, performing at least one of the first channel sensing process or the second channel sensing process at the wireless device includes: performing the first channel sensing process and the second channel sensing process at the antenna panel of the wireless device associated with the first wireless role.

[0280] Aspect 5: The method according to aspect 4 further includes: determining the success of the first channel sensing process based at least in part on an ED value associated with an antenna panel and a first value associated with a first channel sensing process, wherein the ED value satisfies the first value; and determining the success of the second channel sensing process based at least in part on an ED value associated with an antenna panel and a second value associated with a second channel sensing process, wherein the ED value satisfies the second value.

[0281] Aspect 6: According to the method of aspect 1, performing at least one of the first channel sensing process or the second channel sensing process at the wireless device includes performing the first channel sensing process and the second channel sensing process at the antenna panel of the wireless device associated with the second wireless role.

[0282] Aspect 7: The method according to aspect 6 further includes: determining the success of the first channel sensing process based at least in part on an ED value associated with an antenna panel and a first value associated with a first channel sensing process, wherein the ED value satisfies the first value; and determining the success of the second channel sensing process based at least in part on an ED value associated with an antenna panel and a second value associated with a second channel sensing process, wherein the ED value satisfies the second value.

[0283] Aspect 8: The method according to any one of aspects 1-7, wherein performing at least one of the first channel sensing process or the second channel sensing process at the wireless device includes: determining one or more sensing beams associated with at least one of the first channel sensing process or the second channel sensing process; and performing at least one of the first channel sensing process or the second channel sensing process using the one or more sensing beams.

[0284] Aspect 9: According to the method of aspect 8, wherein one or more sensing beams correspond to one or more transmitting beams, and wherein transmitting by a wireless device device during COT via at least one of a first wireless role or a second wireless role includes: transmitting via one or more transmitting beams.

[0285] Aspect 10: The method according to any one of aspects 1-9 further includes: transmitting sensing capability from the wireless device to the parent node or central unit, wherein a first channel sensing process for a first wireless role and a second channel sensing process for a second wireless role are performed at least in part based on the sensing capability.

[0286] Aspect 11: According to the method of aspect 10, the sensing capability includes instructions for a wireless device to perform a first channel sensing process for a first wireless role and a second channel sensing process for a second wireless role as a plurality of nodes.

[0287] Aspect 12: The method according to any one of aspects 10 or 11, wherein the sensing capability includes an indication of whether the wireless device is capable of performing at least one of a first channel sensing process when transmitted via a second wireless role or a second channel sensing process when transmitted via a first wireless role.

[0288] Aspect 13: According to the method of any one of Aspects 10-12, the sensing capability is sent as one or more of F1-AP messages, RRC messages or MAC-CE.

[0289] Aspect 14: The method according to any one of Aspects 1-13, wherein transmitting via at least one of a first wireless role or a second wireless role during COT includes: determining the duplex capability of the wireless device, the success of a first channel sensing process, and the success of a second channel sensing process; and determining, at least in part based on the duplex capability of the wireless device, the success of the first channel sensing process, and the success of the second channel sensing process, whether to transmit at least one of a first transmission from the wireless device via the first wireless role or a second transmission from the wireless device via the second wireless role.

[0290] Aspect 15: The method according to any one of aspects 1-14 further includes: determining a first transmission timing of a first transmission from a wireless device via a first wireless role and a second transmission timing of a second transmission from a wireless device via a second wireless role; and determining a first sensing time slot for performing a first channel sensing process and a second sensing time slot for performing a second channel sensing process, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission and the second sensing time slot is aligned with the second transmission timing of the second transmission.

[0291] Aspect 16: The method according to aspect 15 further includes: determining that the wireless device device satisfies an interference metric.

[0292] Aspect 17: According to the method of aspect 16, determining that the wireless device means satisfies the interference metric includes: applying signal processing techniques to at least one of a first sensing time slot or a second sensing time slot.

[0293] Aspect 18: The method according to any one of aspects 15-17, wherein performing at least one of the first channel sensing process or the second channel sensing process at the wireless device includes: performing the first channel sensing process during a first measurement region within a first sensing time slot, wherein the first measurement region has a first duration; and performing the second channel sensing process during a second measurement region within a second sensing time slot, wherein the second measurement region has a second duration less than the first duration.

[0294] Aspect 19: According to the method of aspect 18, the first duration is equal to four microseconds and the second duration is less than four microseconds.

[0295] Aspect 20: According to the method of either aspect 18 or 19, wherein the first measurement region and the second measurement region are aligned in time.

[0296] Aspect 21: The method according to any one of aspects 15-20, wherein performing at least one of the first channel sensing process or the second channel sensing process at the wireless device device includes: performing the first channel sensing process during a first measurement region of a first sensing window, wherein the first sensing window includes a first sensing time slot, and wherein the first sensing time slot includes a first portion of the first measurement region; and performing the second channel sensing process during a second measurement region of a second sensing window, wherein the second sensing window includes a second sensing time slot, and wherein the second sensing time slot includes a second portion of the second measurement region, the second portion of the second measurement region including a shorter duration than the first portion of the first measurement region.

[0297] Aspect 22: According to the method of aspect 21, a first portion of the first measurement region includes at least four microseconds, and a second portion of the second measurement region includes less than four microseconds.

[0298] Aspect 23: According to the method of any one of aspects 15-22, wherein the first sensing time slot at least partially overlaps with the second sensing time slot.

[0299] Aspect 24: The method according to any one of aspects 1-14 further includes: determining a first transmission timing of a first transmission from a wireless device via a first wireless role and a second transmission timing of a second transmission from a wireless device via a second wireless role; and determining a first sensing time slot for performing a first channel sensing process and a second sensing time slot for performing a second channel sensing process, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is at least partially based on the offset between the first transmission timing of the first transmission and the second transmission timing of the second transmission.

[0300] Aspect 25: The method according to aspect 24 further includes: determining that the wireless device device fails to meet an interference metric, wherein the second sensing time slot is at least partially based on the offset between the first transmission timing of the first transmission and the second transmission timing of the second transmission, which is at least partially based on the determination that the wireless device device fails to meet an interference metric.

[0301] Aspect 26: According to the method of either aspect 24 or 25, wherein the first transmission timing of the first transmission is within a threshold duration of the second transmission timing of the second transmission.

[0302] Aspect 27: The method according to any one of aspects 24-26, wherein the first sensing time slot and the second sensing time slot avoid overlapping with either the first transmission or the second transmission.

[0303] Aspect 28: The method according to any one of aspects 1-14, further comprising: determining a first transmission timing of a first transmission from a wireless device via a first wireless role and a second transmission timing of a second transmission from a wireless device via a second wireless role; determining a first sensing time slot for performing a first channel sensing process; and avoiding performing a second channel sensing process.

[0304] Aspect 29: According to the method of aspect 28, wherein the first transmission timing of the first transmission is within a threshold duration of the second transmission timing of the second transmission.

[0305] Aspect 30: According to the method of either aspect 28 or 29, wherein the second transmission is less than the threshold duration.

[0306] Aspect 31: The method according to any one of aspects 1-14 further includes: determining a first transmission timing of a first transmission from a wireless device via a first wireless role and a second transmission timing of a second transmission from a wireless device via a second wireless role; adding a padding signal to the start of the second transmission, wherein the first transmission timing precedes the second transmission timing by a certain duration equal to the duration of the padding signal; and determining a first sensing time slot for performing a first channel sensing process and a second sensing time slot for performing a second channel sensing process, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission and the second sensing time slot is aligned with the padding signal.

[0307] Aspect 32: The method according to any one of aspects 1-31 further includes: receiving configuration for performing the first channel sensing process and the second channel sensing process at a wireless device device.

[0308] Aspect 33: According to the method of aspect 32, the configuration is received as one or more of F1-AP messages, RRC messages, MAC-CE or DCI.

[0309] Aspect 34: The method according to any one of aspects 1-33, wherein the wireless device is an IAB node, and the first wireless role includes the MT role, and the second wireless role includes the DU role.

[0310] Aspect 35: A method for wireless communication at a wireless device, comprising: identifying a first value of a first channel sensing process associated with a first wireless role of the wireless device and a second value of a second channel sensing process associated with a second wireless role of the wireless device; determining whether at least one ED value associated with a channel satisfies at least one of the first value or the second value; and determining whether to initiate a COT for at least one of the first wireless role or the second wireless role based on determining whether at least one ED value associated with a channel satisfies at least one of the first value or the second value.

[0311] Aspect 36: According to the method of aspect 35, determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value includes: determining the ED value at least in part based on a first channel sensing process; and determining whether the ED value satisfies the first value, wherein determining whether to initiate a COT for a first radio role is based at least in part on determining whether the ED value satisfies the first value.

[0312] Aspect 37: The method according to any one of aspects 35 or 36, wherein determining whether at least one ED value associated with the channel satisfies at least one of a first value or a second value includes: determining the ED value at least in part based on a second channel sensing process; and determining whether the ED value satisfies the second value, wherein determining whether to initiate a COT for a second radio role is based at least in part on determining whether the ED value satisfies the second value.

[0313] Aspect 38: The method according to any one of aspects 35-37 further includes: determining an ED value at least in part based on a first channel sensing process; determining that the ED value satisfies a first value; initiating a COT for a first wireless role at least in part based on determining that the ED value satisfies the first value; determining that the ED value satisfies a second value; and within the COT initiated for the first wireless role, including at least in part based on determining that the ED value satisfies the second value, including one or more transmissions from a wireless device via a second wireless role.

[0314] Aspect 39: The method according to any one of aspects 35-37 further includes: determining an ED value at least in part based on a second channel sensing process; determining that the ED value satisfies a second value; initiating a COT for a second wireless role at least in part based on determining that the ED value satisfies the second value; determining that the ED value satisfies a first value; and within the COT initiated for the second wireless role, at least in part based on determining that the ED value satisfies the first value, including one or more transmissions from a wireless device via a first wireless role.

[0315] Aspect 40: The method according to any one of aspects 35-39, wherein determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value comprises: performing a first channel sensing process using a set of sensing beams; determining the ED value based at least in part on performing the first channel sensing process using the set of sensing beams; and determining whether the ED value satisfies the first value, wherein the first value is for the first channel sensing process using the set of sensing beams.

[0316] Aspect 41: The method according to any one of aspects 35-40, wherein determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value comprises: performing a second channel sensing process using a set of sensing beams; determining the ED value based at least in part on performing the second channel sensing process using the set of sensing beams; and determining whether the ED value satisfies the second value, wherein the second value is for the second channel sensing process using the set of sensing beams.

[0317] Aspect 42: The method according to any one of aspects 35-41, wherein determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value comprises: performing a first channel sensing process using a beam pair; determining the ED value based at least in part on performing the first channel sensing process using a beam pair; and determining whether the ED value satisfies the first value, wherein the first value is for the first channel sensing process using a beam pair.

[0318] Aspect 43: The method according to any one of aspects 35-42, wherein determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value comprises: performing a second channel sensing process using a beam pair; determining the ED value based at least in part on performing the second channel sensing process using a beam pair; and determining whether the ED value satisfies a second value, wherein the second value is for the second channel sensing process using a beam pair.

[0319] Aspect 44: The method according to any one of aspects 35-43, wherein determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value comprises: performing at least one of a first channel sensing process or a second channel sensing process during a sensing time slot in which there is no transmission from the wireless device; determining at least one ED value based at least in part on performing at least one of the first channel sensing process or the second channel sensing process during a sensing time slot in which there is no transmission from the wireless device; and determining whether at least one ED value satisfies at least one of a first value or a second value, wherein the first value is for the first channel sensing process during a sensing time slot in which there is no transmission from the wireless device, and the second value is for the second channel sensing process during a sensing time slot in which there is no transmission from the wireless device.

[0320] Aspect 45: A method according to any one of aspects 35-43, wherein determining whether at least one ED value associated with a channel satisfies at least one of a first value or a second value comprises: performing at least one of a first channel sensing process during a first sensing time slot including transmission via a second wireless role of a wireless device or performing at least one of a second channel sensing process during a second sensing time slot including transmission via a first wireless role of a wireless device; determining at least one ED value based at least in part on performing at least one of performing the first channel sensing process during a first sensing time slot including transmission via a second wireless role of a wireless device or performing at least one of a second channel sensing process during a second sensing time slot including transmission via a first wireless role of a wireless device; and determining whether at least one ED value satisfies at least one of a first value or a second value, wherein the first value is for the first channel sensing process during the first sensing time slot including transmission via a second wireless role of a wireless device, and the second value is for the second channel sensing process during the second sensing time slot including transmission via a first wireless role of a wireless device.

[0321] Aspect 46: The method according to any one of aspects 35-45 further includes: identifying the first value based at least in part on the first category of the first wireless role, and identifying the second value based at least in part on the second category of the second wireless role.

[0322] Aspect 47: According to the method of aspect 46, the first category of the first wireless role includes at least one of wide area class or local area class.

[0323] Aspect 48: The method according to any one of aspects 35-47, wherein identifying the first value and the second value includes: receiving the first value and the second value as an indication of one or more of an F1-AP message, an RRC message, a MAC-CE, or a DCI.

[0324] Aspect 49: According to the method of any one of aspects 35-48, wherein identifying the first value and the second value includes: receiving the first value and the second value as an indication of absolute value.

[0325] Aspect 50: The method according to any one of aspects 35-48, wherein identifying the first value and the second value includes: receiving at least one of the first value or the second value as an indication of an offset value relative to a default value; and determining at least one of the first value or the second value based at least in part on the offset value and the default value.

[0326] Aspect 51: The method according to any one of aspects 35-48, wherein identifying the first value and the second value comprises: receiving at least one of the first value or the second value as an indication of an offset value relative to the indicated parameter; and determining at least one of the first value or the second value based at least in part on the offset value and the indicated parameter.

[0327] Aspect 52: The method according to any one of aspects 35-51, wherein the wireless device is an IAB node, and the first wireless role includes the MT role, and the second wireless role includes the DU role.

[0328] Aspect 53: An apparatus for wireless communication at a wireless device, comprising at least a first interface, a processing system, and a second interface configured to cause the apparatus to perform the methods of any one of aspects 1-34.

[0329] Aspect 54: An apparatus for wireless communication at a wireless device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the methods of any one of aspects 1-34.

[0330] Aspect 55: An apparatus for wireless communication at a wireless device device, comprising at least one component for performing the method of any one of aspects 1-34.

[0331] Aspect 56: A non-transitory computer-readable medium storing code for wireless communication at a wireless device apparatus, the code including instructions executable by a processor to perform the methods of any one of aspects 1-34.

[0332] Aspect 57: An apparatus for wireless communication at a wireless device, comprising at least a first interface, a processing system, and a second interface configured to cause the apparatus to perform the methods of any one of aspects 35-52.

[0333] Aspect 58: An apparatus for wireless communication at a wireless device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the methods of any one of aspects 35-52.

[0334] Aspect 59: An apparatus for wireless communication at a wireless device device, comprising at least one component for performing the method of any one of aspects 35-52.

[0335] Aspect 60: A non-transitory computer-readable medium storing code for wireless communication at a wireless device apparatus, the code including instructions executable by a processor to perform the methods of any one of aspects 35-52.

[0336] As used herein, the term "determine" or "determine" encompasses a variety of actions; therefore, "determine" can include calculation, estimation, processing, derivation, investigation, lookup (such as by searching in a table, database, or other data structure), and confirmation. Furthermore, "determine" can include receiving (such as receiving information), accessing (such as accessing data in memory), and so on. Additionally, "determine" can include resolving, selecting, choosing, establishing, and other similar actions.

[0337] As used in this article, the phrase “at least one” in a list of items refers to any combination of those items, including a single member. For example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc.

[0338] The various illustrative logics, logic blocks, modules, circuits, and algorithmic processes described in conjunction with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or a combination of both. The interchangeability of hardware and software has been generally described in terms of functionality and illustrated in the various illustrative components, blocks, modules, circuits, and processes described above. Whether this functionality is implemented in hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0339] Hardware and data processing means for implementing the various illustrative logics, logic blocks, modules, and circuits described in conjunction with the aspects disclosed herein may be implemented or performed by a general-purpose single-chip or multi-chip processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, or any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, such as a DSP and a microprocessor, multiple microprocessors, a combination of one or more microprocessors combined with a DSP core, or any other such configuration. In some embodiments, specific processes and methods may be performed by circuitry specific to a given function.

[0340] In one or more aspects, the described functionality may be implemented using hardware, digital electronic circuits, computer software, firmware (including the structures disclosed in this specification and their equivalents), or any combination thereof. Embodiments of the subject matter described in this specification may also be implemented as one or more computer programs, i.e., one or more computer program instruction modules encoded on a computer storage medium for execution by a data processing apparatus or for controlling the operation of a data processing apparatus.

[0341] If implemented in software, these functions can be stored or transmitted as one or more instructions or code on or through a computer-readable medium. The processes of the methods or algorithms disclosed herein can be implemented in a processor-executable software module that can reside on a computer-readable medium. Computer-readable media include computer storage media and communication media, with communication media including any medium capable of transferring a computer program from one place to another. Storage media can be any available medium accessible to a computer. By way of example and not limitation, such computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), optical disc (CD)-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and is accessible to a computer. Furthermore, any connection can be properly referred to as a computer-readable medium. Disks and optical discs as used herein include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, while optical discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media. In addition, the operation of a method or algorithm may reside as one or any combination or set of code and instructions on a machine-readable and computer-readable medium that may be incorporated into a computer program product.

[0342] Various modifications to the embodiments described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the spirit or scope of this disclosure. Therefore, the claims are not intended to be limited to the embodiments shown herein, but are to be accorded the broadest scope consistent with this disclosure, its principles, and the novel features disclosed herein.

[0343] Furthermore, those skilled in the art will readily understand that the terms “upper” and “lower” are sometimes used to facilitate the description of the drawings and to indicate the relative positions of the drawings corresponding to the orientation on a correctly oriented page, and may not reflect the correct orientation of any implemented equipment.

[0344] Some features described in this specification in the context of a single implementation may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in multiple implementations. Furthermore, although the features described above may be described as functioning in certain combinations, or even originally claimed in this way, in some examples, one or more features from the claimed combination may be removed from that combination, and the claimed combination may refer to a sub-combination or a variation of the sub-combination.

[0345] Similarly, although operations are described in a specific order in the accompanying drawings, this should not be construed as requiring such operations to be performed in the specific order or sequence shown, or requiring all illustrated operations to achieve the desired result. Furthermore, the drawings may schematically depict more than one example process in the form of a flowchart. However, other operations not described may be combined with the schematically shown example processes. For example, one or more additional operations may be performed before, after, simultaneously with, or between any of the illustrated operations. In some cases, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the above embodiments should not be construed as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated into a single software product or packaged into multiple software products. Additionally, other embodiments are within the scope of the following claims. In some examples, the actions described in the claims may be performed in a different order, and the desired result may still be obtained.

Claims

1. An integrated access and backhaul (IAB) node for wireless communication, comprising: A processing system is configured as follows: A first wireless role and a second wireless role are established for the integrated access and backhaul IAB node, wherein the first wireless role is a mobile terminal role, and the second wireless role is a distributed unit role, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. At the Integrated Access and Backhaul (IAB) node, at least one of a first channel sensing procedure or a second channel sensing procedure is performed, wherein the first channel sensing procedure is for the first radio role and the second channel sensing procedure is for the second radio role. as well as At the Integrated Access and Backhaul (IAB) node, a Channel Occupancy Time (COT) is initiated for the first wireless role based on the first channel sensing process, or for the second wireless role based on the second channel sensing process, or both. as well as The first interface is configured as follows: During the COT, transmission is performed via at least one output signaling from the first wireless role or the second wireless role; The execution of the first channel sensing process and the second channel sensing process at the integrated access and backhaul IAB node includes: The first channel sensing process is performed at the first antenna panel associated with the first wireless role; and The second channel sensing process is performed at a second antenna panel associated with the second wireless role, the second antenna panel being different from the first antenna panel.

2. The integrated access and backhaul IAB node according to claim 1, wherein, The processing system is also configured to: The success of the first channel sensing process is determined at least in part based on a first energy detection ED value associated with the first antenna panel and a first value associated with the first channel sensing process, wherein the first ED value satisfies the first value; as well as The success of the second channel sensing process is determined at least in part based on a second ED value associated with the second antenna panel and a second value associated with the second channel sensing process, wherein the second ED value satisfies the second value.

3. The integrated access and backhaul IAB node according to claim 1, wherein performing at least one of the first channel sensing process or the second channel sensing process at the integrated access and backhaul IAB node comprises: Determine one or more sensing beams associated with at least one of the first channel sensing process or the second channel sensing process; as well as At least one of the first channel sensing process or the second channel sensing process is performed using the one or more sensing beams.

4. The integrated access and backhaul IAB node according to claim 3, wherein the one or more sensing beams correspond to one or more transmitting beams, and wherein the first interface is further configured to: The one or more transmit beams are output for transmission.

5. The integrated access and backhaul IAB node according to claim 1, wherein, The first interface is also configured as follows: The sensing capability is output to the parent node or central unit for transmission, and the processing system performs the first channel sensing process for the first wireless role and the second channel sensing process for the second wireless role based at least in part on the sensing capability.

6. The integrated access and backhaul IAB node according to claim 5, wherein: The sensing capability includes the Integrated Access and Backhaul (IAB) node acting as multiple nodes to instruct the first channel sensing procedure for the first wireless role and the second channel sensing procedure for the second wireless role.

7. The integrated access and backhaul IAB node according to claim 5, wherein: The sensing capability includes an indication of whether the Integrated Access and Backhaul (IAB) node is capable of performing at least one of the first channel sensing process when transmitted via the second wireless role or when transmitted via the first wireless role.

8. The integrated access and backhaul IAB node according to claim 5, wherein: The sensing capability is output for transmission as one or more of the F1 Access Protocol (F1-AP) message, Radio Resource Control (RFC) message, or Media Access Control (MAC) control element (CE).

9. The integrated access and backhaul IAB node according to claim 1, wherein, During the COT, transmission via output signaling from at least one of the first or second radio roles includes: Determine the duplex capability of the integrated access and backhaul IAB nodes, the success of the first channel sensing process, and the success of the second channel sensing process; and Based at least in part on the duplex capability of the Integrated Access and Backhaul IAB node, the success of the first channel sensing process, and the success of the second channel sensing process, it is determined whether to output at least one of a first transmission for transmission from the Integrated Access and Backhaul IAB node via the first radio role or a second transmission for transmission from the Integrated Access and Backhaul IAB node via the second radio role.

10. The integrated access and backhaul IAB node according to claim 1, wherein, The processing system is also configured to: Determine a first transmission timing for a first transmission from the Integrated Access and Backhaul IAB node via the first radio role and a second transmission timing for a second transmission from the Integrated Access and Backhaul IAB node via the second radio role; as well as A first sensing time slot for performing the first channel sensing process and a second sensing time slot for performing the second channel sensing process are determined, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is aligned with the second transmission timing of the second transmission.

11. The integrated access and backhaul IAB node according to claim 10, wherein, The processing system is also configured to: The integrated access and backhaul IAB nodes are determined to meet the interference metric.

12. The integrated access and backhaul IAB node according to claim 11, wherein determining that the integrated access and backhaul IAB node satisfies the interference metric includes: Signal processing techniques are applied to at least one of the first sensing time slot or the second sensing time slot.

13. The Integrated Access and Backhaul (IAB) node of claim 10, wherein performing at least one of the first channel sensing process or the second channel sensing process at the Integrated Access and Backhaul (IAB) node comprises: The first channel sensing process is performed during a first measurement region within the first sensing time slot, wherein the first measurement region has a first duration; as well as The second channel sensing process is performed during a second measurement region within the second sensing time slot, wherein the second measurement region has a second duration that is less than the first duration.

14. The integrated access and backhaul IAB node according to claim 13, wherein: The first duration is equal to four microseconds, and the second duration is less than four microseconds.

15. The integrated access and backhaul IAB node according to claim 13, wherein: The first measurement area and the second measurement area are aligned in time.

16. The Integrated Access and Backhaul (IAB) node of claim 10, wherein performing at least one of the first channel sensing process or the second channel sensing process at the integrated access and backhaul (IAB) node comprises: The first channel sensing process is performed during a first measurement region of a first sensing window, wherein the first sensing window includes the first sensing time slot, and wherein the first sensing time slot includes a first portion of the first measurement region; as well as The second channel sensing process is performed during a second measurement region of a second sensing window, wherein the second sensing window includes the second sensing time slot, and wherein the second sensing time slot includes a second portion of the second measurement region, the second portion of the second measurement region including a shorter duration than the first portion of the first measurement region.

17. The integrated access and backhaul IAB node according to claim 16, wherein: The first portion of the first measurement region comprises at least four microseconds, and the second portion of the second measurement region comprises less than four microseconds.

18. The integrated access and backhaul IAB node according to claim 10, wherein: The first sensing time slot at least partially overlaps with the second sensing time slot.

19. The integrated access and backhaul IAB node according to claim 1, wherein, The processing system is also configured to: Determine a first transmission timing for a first transmission from the Integrated Access and Backhaul IAB node via the first radio role and a second transmission timing for a second transmission from the Integrated Access and Backhaul IAB node via the second radio role; as well as A first sensing time slot for performing the first channel sensing process and a second sensing time slot for performing the second channel sensing process are determined, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is offset from the second transmission timing of the second transmission based on the first transmission timing of the first transmission.

20. The integrated access and backhaul IAB node according to claim 19, wherein, The processing system is also configured to: The determination that the Integrated Access and Backhaul IAB node failed to meet the interference metric, wherein the second sensing time slot is at least partially based on the offset between the first transmission timing of the first transmission and the second transmission timing of the second transmission, is at least partially based on the determination that the Integrated Access and Backhaul IAB node failed to meet the interference metric.

21. The integrated access and backhaul IAB node according to claim 19, wherein: The first transmission timing of the first transmission is within the threshold duration of the second transmission timing of the second transmission.

22. The integrated access and backhaul IAB node according to claim 19, wherein: The first sensing time slot and the second sensing time slot avoid overlapping with either the first transmission or the second transmission.

23. The integrated access and backhaul IAB node according to claim 1, wherein, The processing system is also configured to: Determine a first transmission timing of a first transmission from the Integrated Access and Backhaul IAB node via the first radio role and a second transmission timing of a second transmission from the Integrated Access and Backhaul IAB node via the second radio role, wherein the first transmission timing of the first transmission is within a threshold duration of the second transmission timing of the second transmission, or the second transmission is less than the threshold duration. Determine a first sensing time slot for performing the first channel sensing process; as well as Avoid performing the second channel detection process.

24. The integrated access and backhaul IAB node according to claim 23, wherein: The first transmission timing of the first transmission is within the threshold duration of the second transmission timing of the second transmission.

25. The integrated access and backhaul IAB node according to claim 23, wherein: The second transmission duration is less than the threshold duration.

26. The integrated access and backhaul IAB node according to claim 1, wherein, The processing system is also configured to: Determine a first transmission timing for a first transmission from the Integrated Access and Backhaul IAB node via the first radio role and a second transmission timing for a second transmission from the Integrated Access and Backhaul IAB node via the second radio role; A padding signal is added to the beginning of the second transmission, wherein the first transmission timing precedes the second transmission timing by a certain duration, the duration being equal to the duration of the padding signal; as well as A first sensing time slot for performing the first channel sensing process and a second sensing time slot for performing the second channel sensing process are determined, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is aligned with the fill signal.

27. The integrated access and backhaul IAB node according to claim 1, wherein, The second interface is configured as follows: Obtain the configuration for performing the first channel sensing procedure and the second channel sensing procedure at the integrated access and backhaul IAB node.

28. The integrated access and backhaul IAB node according to claim 27, wherein: The configuration is received as one or more of the following: F1 Access Protocol (F1-AP) message, Radio Resource Control (RFC) message, Media Access Control (MAC) Control Element (CE), or Downlink Control Information.

29. The integrated access and backhaul IAB node according to claim 1, wherein: The Integrated Access and Backhaul IAB node is an Integrated Access and Backhaul IAB node, wherein the first wireless role includes a mobile terminal role, and the second wireless role includes a distributed unit role.

30. An integrated access and backhaul (IAB) node for wireless communication, comprising: A processing system is configured as follows: Identify a first value of a first channel sensing process associated with a first wireless role and a second value of a second channel sensing process associated with a second wireless role, wherein the first wireless role is a mobile terminal role of the integrated access and backhaul IAB node, and wherein the second wireless role is a distributed unit role of the integrated access and backhaul IAB node. The first channel sensing process is performed at a first antenna panel associated with the first wireless role, and the second channel sensing process is performed at a second antenna panel associated with the second wireless role, wherein the second antenna panel is different from the first antenna panel. Determine whether at least one energy detection ED value associated with the channel satisfies at least one of the first value or the second value; and Based on whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value, it is determined whether to initiate a Channel Occupancy Time (COT) for at least one of the first wireless role or the second wireless role.

31. The Integrated Access and Backhaul (IAB) node of claim 30, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The ED value is determined at least in part based on the first channel sensing process; as well as Determining whether the ED value satisfies the first value, wherein determining whether to initiate the COT for the first wireless role is based at least in part on determining whether the ED value satisfies the first value.

32. The Integrated Access and Backhaul (IAB) node of claim 30, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The ED value is determined at least in part based on the second channel sensing process; as well as Determining whether the ED value satisfies the second value, wherein determining whether to initiate the COT for the second wireless role is based at least in part on determining whether the ED value satisfies the second value.

33. The integrated access and backhaul IAB node according to claim 30, wherein, The processing system is also configured to: The ED value is determined at least in part based on the first channel sensing process; The ED value is determined to satisfy the first value; The COT for the first wireless role is initiated at least in part based on determining that the ED value satisfies the first value; Determine that the ED value satisfies the second value; and Based at least in part on determining that the ED value satisfies the second value, the COT initiated for the first radio role includes one or more transmissions from the integrated access and backhaul IAB node via the second radio role.

34. The integrated access and backhaul IAB node according to claim 30, wherein, The processing system is also configured to: The ED value is determined at least in part based on the second channel sensing process; The ED value is determined to satisfy the second value; The COT for the second wireless role is initiated at least in part based on determining that the ED value satisfies the second value; Determine that the ED value satisfies the first value; and Based at least in part on determining that the ED value satisfies the first value, the COT initiated for the second wireless role includes one or more transmissions from the integrated access and backhaul IAB node via the first wireless role.

35. The Integrated Access and Backhaul (IAB) node of claim 30, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The first channel sensing process is performed using a set of sensing beams; The ED value is determined at least in part based on performing the first channel sensing process using the set of sensing beams; as well as Determine whether the ED value satisfies the first value, wherein the first value is for the first channel sensing process using the set of sensing beams.

36. The Integrated Access and Backhaul (IAB) node of claim 30, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The second channel sensing process is performed using a set of sensing beams; The ED value is determined at least in part based on performing the second channel sensing process using the aforementioned set of sensing beams; as well as Determine whether the ED value satisfies the second value, wherein the second value is for the second channel sensing process using the set of sensing beams.

37. The Integrated Access and Backhaul (IAB) node of claim 30, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The first channel sensing process is performed using a beam pair; The ED value is determined at least in part based on performing the first channel sensing process using the beam pair; as well as Determine whether the ED value satisfies the first value, wherein the first value is for the first channel sensing process using the beam pair.

38. The Integrated Access and Backhaul (IAB) node of claim 30, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The second channel sensing process is performed using a beam pair; The ED value is determined at least in part based on performing the second channel sensing process using the beam pair; as well as Determine whether the ED value satisfies the second value, wherein the second value is for the second channel sensing process using the beam pair.

39. The Integrated Access and Backhaul (IAB) node of claim 30, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: At least one of the first channel sensing process or the second channel sensing process is performed during a sensing time slot when there is no transmission from the integrated access and backhaul IAB node; The at least one ED value is determined at least in part based on performing at least one of the first channel sensing process or the second channel sensing process during the sensing time slot when there is no transmission from the integrated access and backhaul IAB node; as well as Determine whether the at least one ED value satisfies at least one of the first value or the second value, wherein the first value is for the first channel sensing process during the sensing time slot when there is no transmission from the integrated access and backhaul IAB node, and the second value is for the second channel sensing process during the sensing time slot when there is no transmission from the integrated access and backhaul IAB node.

40. The Integrated Access and Backhaul (IAB) node of claim 30, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The first channel sensing process is performed during a first sensing time slot including transmissions of the second radio role via the integrated access and backhaul IAB node, or at least one of the following is performed during a second sensing time slot including transmissions of the first radio role via the integrated access and backhaul IAB node: The at least one ED value is determined based at least in part on performing the first channel sensing process during the first sensing time slot, which includes transmissions via the second radio role through the integrated access and backhaul IAB node, or performing the second channel sensing process during the second sensing time slot, which includes transmissions via the first radio role through the integrated access and backhaul IAB node. as well as Determine whether the at least one ED value satisfies at least one of the first value or the second value, wherein the first value is for the first channel sensing process during the first sensing time slot including transmissions via the second radio role via the integrated access and backhaul IAB node, and the second value is for the second channel sensing process during the second sensing time slot including transmissions via the first radio role via the integrated access and backhaul IAB node.

41. The integrated access and backhaul IAB node according to claim 30, wherein, The processing system is also configured to: The first value is identified at least in part based on the first category of the first wireless role, and the second value is identified at least in part based on the second category of the second wireless role.

42. The integrated access and backhaul IAB node according to claim 41, wherein: The first category of the first wireless role includes at least one of the wide area class or the local area class.

43. The integrated access and backhaul IAB node of claim 30, wherein identifying the first value and the second value includes configuring the first interface to: The first and second values ​​are obtained as indications of one or more of the following: F1 Access Protocol F1-AP message, Radio Resource Control message, Media Access Control (MAC) Control Element (CE), or Downlink Control Information.

44. The integrated access and backhaul IAB node of claim 30, wherein identifying the first value and the second value includes configuring the first interface to: Obtain the first and second values ​​as indications of their absolute values.

45. The integrated access and backhaul IAB node of claim 30, wherein identifying the first value and the second value includes configuring the first interface to: Obtain at least one of the first value or the second value as an indication of an offset value relative to the default value; and Configure the processing system to: At least one of the first value or the second value is determined based at least in part on the offset value and the default value.

46. ​​The integrated access and backhaul IAB node of claim 30, wherein identifying the first value and the second value includes configuring the first interface to: Obtain at least one of the first value or the second value as an indication of an offset value relative to the indicated parameter; and Configure the processing system to: At least one of the first value or the second value is determined based at least in part on the offset value and the indicated parameter.

47. The integrated access and backhaul IAB node according to claim 30, wherein: The Integrated Access and Backhaul IAB node is an Integrated Access and Backhaul IAB node, wherein the first wireless role includes a mobile terminal role, and the second wireless role includes a distributed unit role.

48. A method for wireless communication at integrated access and backhaul (IAB) nodes, comprising: A first wireless role and a second wireless role are established for the integrated access and backhaul IAB node, wherein the first wireless role is a mobile terminal role, and the second wireless role is a distributed unit role, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. At the Integrated Access and Backhaul (IAB) node, at least one of a first channel sensing procedure or a second channel sensing procedure is performed, wherein the first channel sensing procedure is for the first radio role and the second channel sensing procedure is for the second radio role. At the Integrated Access and Backhaul (IAB) node, a Channel Occupancy Time (COT) is initiated for the first wireless role based on the first channel sensing process, or for the second wireless role based on the second channel sensing process, or both. as well as During the COT, transmission is made via at least one of the first wireless role or the second wireless role; The execution of the first channel sensing process and the second channel sensing process at the integrated access and backhaul IAB node includes: The first channel sensing process is performed at the first antenna panel associated with the first wireless role; and The second channel sensing process is performed at a second antenna panel associated with the second wireless role, the second antenna panel being different from the first antenna panel.

49. The method of claim 48, further comprising: The success of the first channel sensing process is determined at least in part based on a first energy detection (ED) value associated with the first antenna panel and a first value associated with the first channel sensing process, wherein the first ED value satisfies the first value; as well as The success of the second channel sensing process is determined at least in part based on a second ED value associated with the second antenna panel and a second value associated with the second channel sensing process, wherein the second ED value satisfies the second value.

50. The method of claim 48, wherein performing at least one of the first channel sensing process or the second channel sensing process at the integrated access and backhaul IAB node comprises: Determine one or more sensing beams associated with at least one of the first channel sensing process or the second channel sensing process; as well as At least one of the first channel sensing process or the second channel sensing process is performed using the one or more sensing beams.

51. The method of claim 50, wherein the one or more sensing beams correspond to one or more transmitting beams, and wherein transmitting during the COT period via at least one of the first wireless role or the second wireless role comprises: Transmitted via one or more transmission beams.

52. The method of claim 48, further comprising: The integrated access and backhaul (IAB) node sends sensing capabilities to the parent node or central unit, wherein the first channel sensing process for the first wireless role and the second channel sensing process for the second wireless role are performed at least in part based on the sensing capabilities.

53. The method according to claim 52, wherein: The sensing capability includes the Integrated Access and Backhaul (IAB) node acting as multiple nodes to instruct the first channel sensing procedure for the first wireless role and the second channel sensing procedure for the second wireless role.

54. The method according to claim 52, wherein: The sensing capability includes an indication of whether the Integrated Access and Backhaul (IAB) node is capable of performing at least one of the first channel sensing process when transmitted via the second wireless role or when transmitted via the first wireless role.

55. The method according to claim 52, wherein: The sensing capability is transmitted as one or more of the F1 Access Protocol (F1-AP) message, Radio Resource Control (RFC) message, or Media Access Control (MAC) control element (CE).

56. The method according to claim 48, wherein, Transmission during the COT period via at least one of the first wireless role or the second wireless role includes: Determine the duplex capability of the integrated access and backhaul IAB nodes, the success of the first channel sensing process, and the success of the second channel sensing process; and Based at least in part on the duplex capability of the Integrated Access and Backhaul IAB node, the success of the first channel sensing process, and the success of the second channel sensing process, it is determined whether to send at least one of a first transmission from the Integrated Access and Backhaul IAB node via the first radio role or a second transmission from the Integrated Access and Backhaul IAB node via the second radio role.

57. The method of claim 48, further comprising: Determine a first transmission timing for a first transmission from the Integrated Access and Backhaul IAB node via the first radio role and a second transmission timing for a second transmission from the Integrated Access and Backhaul IAB node via the second radio role; as well as A first sensing time slot for performing the first channel sensing process and a second sensing time slot for performing the second channel sensing process are determined, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is aligned with the second transmission timing of the second transmission.

58. The method of claim 57, further comprising: The integrated access and backhaul IAB nodes are determined to meet the interference metric.

59. The method of claim 58, wherein determining that the integrated access and backhaul IAB node satisfies the interference metric comprises: Signal processing techniques are applied to at least one of the first sensing time slot or the second sensing time slot.

60. The method of claim 57, wherein performing at least one of the first channel sensing process or the second channel sensing process at the integrated access and backhaul IAB node comprises: The first channel sensing process is performed during a first measurement region within the first sensing time slot, wherein the first measurement region has a first duration; as well as The second channel sensing process is performed during a second measurement region within the second sensing time slot, wherein the second measurement region has a second duration that is less than the first duration.

61. The method of claim 60, wherein: The first duration is equal to four microseconds, and the second duration is less than four microseconds.

62. The method according to claim 60, wherein: The first measurement area and the second measurement area are aligned in time.

63. The method of claim 57, wherein performing at least one of the first channel sensing process or the second channel sensing process at the integrated access and backhaul IAB node comprises: The first channel sensing process is performed during a first measurement region of a first sensing window, wherein the first sensing window includes the first sensing time slot, and wherein the first sensing time slot includes a first portion of the first measurement region; as well as The second channel sensing process is performed during a second measurement region of a second sensing window, wherein the second sensing window includes the second sensing time slot, and wherein the second sensing time slot includes a second portion of the second measurement region, the second portion of the second measurement region including a shorter duration than the first portion of the first measurement region.

64. The method according to claim 63, wherein: The first portion of the first measurement region comprises at least four microseconds, and the second portion of the second measurement region comprises less than four microseconds.

65. The method according to claim 57, wherein: The first sensing time slot at least partially overlaps with the second sensing time slot.

66. The method of claim 48, further comprising: Determine a first transmission timing for a first transmission from the Integrated Access and Backhaul IAB node via the first radio role and a second transmission timing for a second transmission from the Integrated Access and Backhaul IAB node via the second radio role; as well as A first sensing time slot for performing the first channel sensing process and a second sensing time slot for performing the second channel sensing process are determined, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is offset from the second transmission timing of the second transmission based on the first transmission timing of the first transmission.

67. The method of claim 66, further comprising: The determination that the Integrated Access and Backhaul IAB node failed to meet the interference metric, wherein the second sensing time slot is at least partially based on the offset between the first transmission timing of the first transmission and the second transmission timing of the second transmission, is at least partially based on the determination that the Integrated Access and Backhaul IAB node failed to meet the interference metric.

68. The method according to claim 66, wherein: The first transmission timing of the first transmission is within the threshold duration of the second transmission timing of the second transmission.

69. The method according to claim 66, wherein: The first sensing time slot and the second sensing time slot avoid overlapping with either the first transmission or the second transmission.

70. The method of claim 48, further comprising: Determine a first transmission timing for a first transmission from the Integrated Access and Backhaul IAB node via the first radio role and a second transmission timing for a second transmission from the Integrated Access and Backhaul IAB node via the second radio role; Determine a first sensing time slot for performing the first channel sensing process; as well as Avoid performing the second channel detection process.

71. The method according to claim 70, wherein: The first transmission timing of the first transmission is within the threshold duration of the second transmission timing of the second transmission.

72. The method according to claim 70, wherein: The second transmission duration is less than the threshold duration.

73. The method of claim 48, further comprising: Determine a first transmission timing for a first transmission from the Integrated Access and Backhaul IAB node via the first radio role and a second transmission timing for a second transmission from the Integrated Access and Backhaul IAB node via the second radio role; A padding signal is added to the beginning of the second transmission, wherein the first transmission timing precedes the second transmission timing by a certain duration, the duration being equal to the duration of the padding signal; as well as A first sensing time slot for performing the first channel sensing process and a second sensing time slot for performing the second channel sensing process are determined, wherein the first sensing time slot is aligned with the first transmission timing of the first transmission, and the second sensing time slot is aligned with the fill signal.

74. The method of claim 48, further comprising: Receive configuration for performing the first channel sensing procedure and the second channel sensing procedure at the integrated access and backhaul IAB node.

75. The method according to claim 74, wherein: The configuration is received as one or more of the following: F1 Access Protocol (F1-AP) message, Radio Resource Control (RFC) message, Media Access Control (MAC) Control Element (CE), or Downlink Control Information.

76. The method according to claim 48, wherein: The Integrated Access and Backhaul IAB node is an Integrated Access and Backhaul IAB node, wherein the first wireless role includes a mobile terminal role, and the second wireless role includes a distributed unit role.

77. A method for wireless communication at integrated access and backhaul (IAB) nodes, comprising: Identify a first value of a first channel sensing process associated with a first wireless role and a second value of a second channel sensing process associated with a second wireless role, wherein the first wireless role is a mobile terminal role of the integrated access and backhaul IAB node, and wherein the second wireless role is a distributed unit role of the integrated access and backhaul IAB node. The first channel sensing process is performed at a first antenna panel associated with the first wireless role, and the second channel sensing process is performed at a second antenna panel associated with the second wireless role, wherein the second antenna panel is different from the first antenna panel. Determine whether at least one energy detection ED value associated with the channel satisfies at least one of the first value or the second value; and Based on whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value, it is determined whether to initiate a Channel Occupancy Time (COT) for at least one of the first wireless role or the second wireless role.

78. The method of claim 77, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The ED value is determined at least in part based on the first channel sensing process; as well as Determining whether the ED value satisfies the first value, wherein determining whether to initiate the COT for the first wireless role is based at least in part on determining whether the ED value satisfies the first value.

79. The method of claim 77, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The ED value is determined at least in part based on the second channel sensing process; as well as Determining whether the ED value satisfies the second value, wherein determining whether to initiate the COT for the second wireless role is based at least in part on determining whether the ED value satisfies the second value.

80. The method of claim 77, further comprising: The ED value is determined at least in part based on the first channel sensing process; The ED value is determined to satisfy the first value; The COT for the first wireless role is initiated at least in part based on determining that the ED value satisfies the first value; Determine that the ED value satisfies the second value; and Based at least in part on determining that the ED value satisfies the second value, the COT initiated for the first radio role includes one or more transmissions from the integrated access and backhaul IAB node via the second radio role.

81. The method of claim 77, further comprising: The ED value is determined at least in part based on the second channel sensing process; The ED value is determined to satisfy the second value; The COT for the second wireless role is initiated at least in part based on determining that the ED value satisfies the second value; Determine that the ED value satisfies the first value; and Based at least in part on determining that the ED value satisfies the first value, the COT initiated for the second wireless role includes one or more transmissions from the integrated access and backhaul IAB node via the first wireless role.

82. The method of claim 77, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The first channel sensing process is performed using a set of sensing beams; The ED value is determined at least in part based on performing the first channel sensing process using the set of sensing beams; as well as Determine whether the ED value satisfies the first value, wherein the first value is for the first channel sensing process using the set of sensing beams.

83. The method of claim 77, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The second channel sensing process is performed using a set of sensing beams; The ED value is determined at least in part based on performing the second channel sensing process using the aforementioned set of sensing beams; as well as Determine whether the ED value satisfies the second value, wherein the second value is for the second channel sensing process using the set of sensing beams.

84. The method of claim 77, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The first channel sensing process is performed using a beam pair; The ED value is determined at least in part based on performing the first channel sensing process using the beam pair; as well as Determine whether the ED value satisfies the first value, wherein the first value is for the first channel sensing process using the beam pair.

85. The method of claim 77, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The second channel sensing process is performed using a beam pair; The ED value is determined at least in part based on performing the second channel sensing process using the beam pair; as well as Determine whether the ED value satisfies the second value, wherein the second value is for the second channel sensing process using the beam pair.

86. The method of claim 77, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: At least one of the first channel sensing process or the second channel sensing process is performed during a sensing time slot when there is no transmission from the integrated access and backhaul IAB node; The at least one ED value is determined at least in part based on performing at least one of the first channel sensing process or the second channel sensing process during the sensing time slot when there is no transmission from the integrated access and backhaul IAB node; as well as Determine whether the at least one ED value satisfies at least one of the first value or the second value, wherein the first value is for the first channel sensing process during the sensing time slot when there is no transmission from the integrated access and backhaul IAB node, and the second value is for the second channel sensing process during the sensing time slot when there is no transmission from the integrated access and backhaul IAB node.

87. The method of claim 77, wherein determining whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value comprises: The first channel sensing process is performed during a first sensing time slot including transmissions of the second radio role via the integrated access and backhaul IAB node, or at least one of the following is performed during a second sensing time slot including transmissions of the first radio role via the integrated access and backhaul IAB node: The at least one ED value is determined based at least in part on performing the first channel sensing process during the first sensing time slot, which includes transmissions via the second radio role through the integrated access and backhaul IAB node, or performing the second channel sensing process during the second sensing time slot, which includes transmissions via the first radio role through the integrated access and backhaul IAB node. as well as Determine whether the at least one ED value satisfies at least one of the first value or the second value, wherein the first value is for the first channel sensing process during the first sensing time slot including transmissions via the second radio role via the integrated access and backhaul IAB node, and the second value is for the second channel sensing process during the second sensing time slot including transmissions via the first radio role via the integrated access and backhaul IAB node.

88. The method of claim 77, further comprising: The first value is identified at least in part based on the first category of the first wireless role, and the second value is identified at least in part based on the second category of the second wireless role.

89. The method according to claim 88, wherein: The first category of the first wireless role includes at least one of the wide area class or the local area class.

90. The method of claim 77, wherein identifying the first value and the second value comprises: The first and second values ​​are received as indications of one or more of the following: F1 Access Protocol F1-AP message, Radio Resource Control message, Media Access Control (MAC) Control Element (CE), or Downlink Control Information.

91. The method of claim 77, wherein identifying the first value and the second value comprises: Receive the first value and the second value as an indication of absolute value.

92. The method of claim 77, wherein identifying the first value and the second value comprises: Receive at least one of the first value or the second value as an indication of an offset value relative to the default value; as well as At least one of the first value or the second value is determined based at least in part on the offset value and the default value.

93. The method of claim 77, wherein identifying the first value and the second value comprises: Receive at least one of the first value or the second value as an indication of an offset value relative to the indicated parameter; as well as At least one of the first value or the second value is determined based at least in part on the offset value and the indicated parameter.

94. The method according to claim 77, wherein: The Integrated Access and Backhaul IAB node is an Integrated Access and Backhaul IAB node, wherein the first wireless role includes a mobile terminal role, and the second wireless role includes a distributed unit role.

95. An integrated access and backhaul (IAB) node for wireless communication, comprising: Components for establishing a first wireless role and a second wireless role for the integrated access and backhaul IAB node, wherein the first wireless role is a mobile terminal role, wherein the second wireless role is a distributed unit role, wherein the first wireless role is associated with upstream communication, and the second wireless role is associated with downstream communication. A component for performing at least one of a first channel sensing process or a second channel sensing process at the Integrated Access and Backhaul (IAB) node, wherein the first channel sensing process is for the first wireless role and the second channel sensing process is for the second wireless role. A component for initiating a Channel Occupancy Time (COT) at the Integrated Access and Backhaul (IAB) node for the first wireless role based on the first channel sensing process or for the second wireless role based on the second channel sensing process or both. as well as Components for transmitting via at least one of the first wireless role or the second wireless role during the COT; The execution of the first channel sensing process and the second channel sensing process at the integrated access and backhaul IAB node includes: The first channel sensing process is performed at the first antenna panel associated with the first wireless role; and The second channel sensing process is performed at a second antenna panel associated with the second wireless role, the second antenna panel being different from the first antenna panel.

96. An integrated access and backhaul (IAB) node for wireless communication, comprising: Components for identifying a first value of a first channel sensing process associated with a first wireless role and a second value of a second channel sensing process associated with a second wireless role, wherein the first wireless role is a mobile terminal role of the integrated access and backhaul IAB node, and wherein the second wireless role is a distributed unit role of the integrated access and backhaul IAB node. A component for determining whether at least one energy detection ED value associated with a channel satisfies at least one of the first value or the second value; as well as A component for determining whether to initiate a Channel Occupancy Time (COT) for at least one of the first radio role or the second radio role based on whether at least one ED value associated with the channel satisfies at least one of the first value or the second value.

97. A non-transitory computer-readable storage medium storing code for wireless communication at integrated access and backhaul (IAB) nodes, the code including processor-executable instructions to: A first wireless role is established for the integrated access and backhaul IAB node, wherein the first wireless role is a mobile terminal role, and a second wireless role is established, wherein the second wireless role is a distributed unit role, wherein the first wireless role is associated with upstream communication and the second wireless role is associated with downstream communication. At the Integrated Access and Backhaul (IAB) node, at least one of a first channel sensing procedure or a second channel sensing procedure is performed, wherein the first channel sensing procedure is for the first radio role and the second channel sensing procedure is for the second radio role. At the Integrated Access and Backhaul (IAB) node, a Channel Occupancy Time (COT) is initiated for the first wireless role based on the first channel sensing process, or for the second wireless role based on the second channel sensing process, or both. as well as During the COT, transmission is made via at least one of the first wireless role or the second wireless role; The execution of the first channel sensing process and the second channel sensing process at the integrated access and backhaul IAB node includes: The first channel sensing process is performed at the first antenna panel associated with the first wireless role; and The second channel sensing process is performed at a second antenna panel associated with the second wireless role, the second antenna panel being different from the first antenna panel.

98. A non-transitory computer-readable medium storing code for wireless communication at integrated access and backhaul (IAB) nodes, the code comprising processor-executable instructions to: Identify a first value of a first channel sensing process associated with a first wireless role and a second value of a second channel sensing process associated with a second wireless role, wherein the first wireless role is a mobile terminal role of the integrated access and backhaul IAB node, and wherein the second wireless role is a distributed unit role of the integrated access and backhaul IAB node. in, The first channel sensing process is performed at a first antenna panel associated with the first wireless role, and the second channel sensing process is performed at a second antenna panel associated with the second wireless role, the second antenna panel being different from the first antenna panel; Determine whether at least one energy detection ED value associated with the channel satisfies at least one of the first value or the second value; as well as Based on whether the at least one ED value associated with the channel satisfies at least one of the first value or the second value, it is determined whether to initiate a Channel Occupancy Time (COT) for at least one of the first wireless role or the second wireless role.

Images