Self-Interference Measurement for Clutter Echo Detection

Abstract

A configuration for configuring a first wireless device to detect clutter echoes to improve the configuration for a SIM. The device receives a SIM configuration having one or more parameters dedicated to clutter echo detection. The device performs SIM for clutter echo detection based on the SIM configuration. The device reports one or more beams having the maximum self-interference RSRP due to clutter echoes.

Description

[0001] Cross - Reference to Related Applications

[0002] This application claims the benefit of U.S. Provisional Application No. 63 / 033,736, filed Jun. 2, 2020, entitled “Self Interference Measurement for Clutter Echo Detection” and U.S. Patent Application No. 17 / 319,969, filed May 13, 2021, entitled “Self Interference Measurement for Clutter Echo Detection”, which are hereby incorporated by reference in their entirety. Technical Field

[0003] The present disclosure generally relates to communication systems, and more particularly to self - interference measurement procedures in wireless communication systems.

[0004] Introduction

[0005] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ multiple access techniques that are capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access techniques include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single - Carrier Frequency Division Multiple Access (SC - FDMA) systems, and Time - Division Synchronous Code Division Multiple Access (TD - SCDMA) systems.

[0006] These multiple access techniques have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at the urban, national, regional, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine - type communication (mMTC), and ultra - reliable low - latency communication (URLLC). Some aspects of 5G NR may be based on the 4G Long - Term Evolution (LTE) standard. There is a need for further improvement in 5G NR technology. These improvements may also apply to other multiple access techniques and telecommunication standards that employ these techniques.

[0007] Brief Summary

[0008] A brief overview of one or more aspects is given below to provide a basic understanding of such aspects. This overview is not an exhaustive survey of all contemplated aspects, and is neither intended to identify key or critical elements of all aspects nor to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that follows.

[0009] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be an apparatus at a first wireless device. The apparatus may be a processor and / or a modem at the first wireless device, or the first wireless device itself. The apparatus receives a self-interference measurement (SIM) configuration having one or more parameters dedicated to clutter echo detection that are different from other types of self-interference measurements (SIMs). The apparatus performs a SIM for clutter echo detection based on the SIM configuration. The apparatus reports one or more beams having the maximum self-interference reference signal received power (RSRP) due to clutter echoes.

[0010] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be an apparatus at a first wireless device. The apparatus may be a processor and / or a modem at the first wireless device, or the first wireless device itself. The apparatus transmits a SIM configuration having one or more parameters dedicated to clutter echo detection that are different from other types of self-interference measurements (SIMs) to a second wireless device. The apparatus receives a report of one or more beams having the maximum self-interference reference signal received power (RSRP) due to clutter echoes.

[0011] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be an apparatus at a first wireless device. The apparatus may be a processor and / or a modem at the first wireless device, or the first wireless device itself. The apparatus transmits an uplink sounding reference signal (SRS), an uplink demodulation reference signal (DMRS), a physical uplink shared channel (PUSCH), or a physical uplink control channel (PUCCH). The apparatus determines to perform a self-interference measurement (SIM) for clutter echo detection. The apparatus performs a SIM for clutter echo detection based on measurements of the uplink SRS, uplink DMRS, PUSCH, or PUCCH. The apparatus reports one or more beams having the maximum self-interference reference signal received power (RSRP) due to clutter echoes.

[0012] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a first wireless device. The device may be a processor and / or a modem at the first wireless device, or the first wireless device itself. The apparatus receives a request for measurement resources for self-interference measurement (SIM) for clutter echo detection from a second wireless device. The apparatus transmits a configuration of the measurement resources to the second wireless device. The apparatus receives a report of one or more beams having a maximum self-interference reference signal received power (RSRP) due to clutter echoes.

[0013] To achieve the foregoing and related ends, one or more of these aspects include the features specifically recited in the claims below. The following description and the drawings set forth in detail certain illustrative features of one or more of these aspects. However, these features are merely indicative of the various ways in which the principles of various aspects may be employed, and this description is intended to cover all such aspects and their equivalents. Brief Description of the Drawings

[0015] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0016] Figure 2A is a diagram illustrating an example of a first frame in accordance with various aspects of the present disclosure.

[0017] Figure 2B is a diagram illustrating an example of DL channels within a subframe in accordance with various aspects of the present disclosure.

[0018] Figure 2C is a diagram illustrating an example of a second frame in accordance with various aspects of the present disclosure.

[0019] Figure 2D is a diagram illustrating an example of UL channels within a subframe in accordance with various aspects of the present disclosure.

[0020] Figure 3 is a diagram illustrating an example of an IAB node and a user equipment (UE) in a network.

[0021] Figure 4 is a diagram illustrating an example IAB network.

[0022] Figure 5 is a diagram illustrating an example IAB network and its components.

[0023] Figures 6A - 6C is a diagram illustrating an example of full-duplex communication.

[0024] Figure 7 is a call flow diagram of signaling between a first wireless device and a second wireless device in accordance with certain aspects of the present invention.

[0025] Figure 8 It is a call flow diagram of signaling between a first wireless device and a second wireless device according to certain aspects of the present invention.

[0026] Figure 9 It is a flowchart of a wireless communication method.

[0027] Figure 10 It is a flowchart of a wireless communication method.

[0028] Figure 11 It is a diagram illustrating an example of the hardware implementation of an example device.

[0029] Figure 12 It is a flowchart of a wireless communication method.

[0030] Figure 13 It is a flowchart of a wireless communication method.

[0031] Figure 14 It is a diagram illustrating an example of the hardware implementation of an example device.

[0032] Figure 15 It is a flowchart of a wireless communication method.

[0033] Figure 16 It is a flowchart of a wireless communication method.

[0034] Figure 17 It is a diagram illustrating an example of the hardware implementation of an example device.

[0035] Figure 18 It is a flowchart of a wireless communication method.

[0036] Figure 19 It is a diagram illustrating an example of the hardware implementation of an example device.

[0037] Detailed Description

[0038] The following detailed description, presented in conjunction with the accompanying drawings, is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0039] Aspects of a telecommunications system will now be given with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the particular application and the design constraints imposed on the overall system.

[0040] As an example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system" that includes one or more processors. Examples of processors include: microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in the processing system can execute software. Software should be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., regardless of whether it is referred to in terms of software, firmware, middleware, microcode, hardware description language, or other terms.

[0041] Accordingly, in one or more example embodiments, the described functions can be implemented in hardware, software, or any combination thereof. If implemented in software, the functions can be stored or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media. Storage media can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media can include random access memory (RAM), read only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of these types of computer-readable media, or any other medium capable of storing computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0042] Although aspects are described herein by way of some examples, those skilled in the art will understand that additional implementations and use cases can be generated in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, the implementations and / or uses can be generated via integrated chips and other non-module component-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / shopping devices, medical devices, artificial intelligence (AI)-enabled devices, etc.). Although some examples may or may not be specific to particular use cases or applications, a wide applicability of the described innovations can occur. The scope of implementations can range from chip-level or module components to non-module, non-chip-level implementations and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more aspects of the described innovations. In some practical environments, devices incorporating the described aspects and features may also include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals necessarily includes several components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). The innovations described herein are intended to be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc. of various sizes, shapes, and constitutions.

[0043] Figure 1 is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system and access network 100 may include one or more UEs 104 in communication with a base station 102 or 180. The system may include a UE 104 in communication with other UEs 104. The wireless communication system and access network 100 may include an integrated access and backhaul (IAB) network that includes a plurality of cells in communication with each other to provide an access network and a backhaul network to a core network such as core network 190 or evolved packet core (EPC) 160. The core network 190 may be a 5G core (5GC), a core network supporting new radio (NR) communication, or another type of core network. The IAB network may include one or more IAB nodes 103. The IAB nodes may exchange communications with other IAB nodes 103, with the base station 102 or 180, and / or with the UE 104.

[0044] Referring again to Figure 1, in some aspects, a wireless device (such as UE 104 or IAB node 103) may be configured to detect clutter echoes to improve the configuration for SIM and detect the location of clutter. The IAB node 103 can be an IAB node, a child node, or a parent node. For example, the UE 104 or the IAB node 103 may include a measurement component 198 configured to perform measurements that can indicate clutter echoes in the estimated location. The UE 104 or the IAB node may receive a SIM configuration having one or more parameters dedicated to clutter echo detection that are different from other types of self-interference measurements (SIM). For example, the UE 104 may receive the configuration from the base station 102 or 180 or from the IAB node 103. The IAB node 103 may receive the configuration from a parent IAB node or from the base station 102 or 180. The UE 104 or the IAB node may perform SIM for clutter echo detection based on the SIM configuration. The UE 104 or the IAB node may report one or more beams having the maximum self-interference reference signal received power (RSRP) due to clutter echoes.

[0045] Referring again to Figure 1 , in some aspects, the base station 102 or 180 or the IAB node 103 may be configured to provide a SIM configuration that takes into account detected clutter echoes. For example, the base station 102 or 180 or the IAB node 103 may include a SIM configuration component 199 configured to transmit a SIM configuration having one or more parameters dedicated to clutter echo detection to the UE 104 or the child IAB node 103. The base station 102 or 180 or the IAB node 103 may transmit a SIM configuration having one or more parameters dedicated to clutter echo detection that are different from other types of SIM to the UE 104 or the child IAB node 103. The base station 102 or 180 or the IAB node 103 may receive a report of one or more beams having the maximum self-interference RSRP due to clutter echoes.

[0046] Although the examples in the following description may focus on 5G NR, the concepts described herein may be applicable to other similar fields, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0047] A wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (high-power cellular base station) and / or a small cell (low-power cellular base station). The macro cell includes a base station. The small cell includes a femto cell, a pico cell, and a micro cell.

[0048] Base stations 102 configured for 4G LTE (collectively, evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN)) may interface with the EPC 160 via a first backhaul link 132 (e.g., S1 interface). Base stations 102 configured for 5G NR (collectively, next-generation RAN (NG-RAN)) may interface with the core network 190 via a second backhaul link 184. In addition to other functions, base stations 102 may also perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracing, radio access network information management (RIM), paging, positioning, and delivery of alert messages. Base stations 102 may communicate with each other directly or indirectly (e.g., via the EPC 160 or the core network 190) on a third backhaul link 134 (e.g., X2 interface). The first backhaul link 132, the second backhaul link 184, and the third backhaul link 134 may be wired or wireless.

[0049] Base station 102 can communicate wirelessly with UE 104. Each base station 102 can provide communication coverage for its respective geographical coverage area 110. There may be overlapping geographical coverage areas 110. For example, small cell 102' may have a coverage area 110' that overlaps with the coverage areas 110 of one or more macro base stations 102. A network including both small cells and macro cells can be referred to as a heterogeneous network. The heterogeneous network may also include a home evolved Node B (eNB) (HeNB) that can serve a restricted group known as a closed subscriber group (CSG). The communication link 120 between the base station 102 and the UE 104 can include an uplink (UL) (also known as the reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also known as the forward link) transmission from the base station 102 to the UE 104. The communication link 120 can use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. These communication links can be through one or more carriers. For each carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 can use a spectrum with a bandwidth of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.). These carriers may or may not be adjacent to each other. The allocation of carriers can be asymmetric with respect to the DL and UL (e.g., more or fewer carriers may be allocated to the DL compared to the UL). The component carriers can include a primary component carrier and one or more secondary component carriers. The primary component carrier can be referred to as the primary cell (PCell), and the secondary component carriers can be referred to as secondary cells (SCells).

[0050] Some UEs 104 can communicate with each other using device-to-device (D2D) communication links 158. The D2D communication links 158 can use DL / UL WWAN spectrum. The D2D communication links 158 can use one or more sidelink channels, such as the physical sidelink broadcast channel (PSBCH), the physical sidelink discovery channel (PSDCH), the physical sidelink shared channel (PSSCH), and the physical sidelink control channel (PSCCH). D2D communication can be through various wireless D2D communication systems, such as, for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards, LTE, or NR.

[0051] The wireless communication system may further include, for example, a Wi-Fi access point (AP) 150 in communication with a Wi-Fi station (STA) 152 via a communication link 154 in an unlicensed spectrum such as the 5 GHz unlicensed spectrum. When communicating in an unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) before communication to determine whether the channel is available.

[0052] The small cell 102' may operate in licensed and / or unlicensed spectrums. When operating in an unlicensed spectrum, the small cell 102' may adopt NR and use the same unlicensed spectrum (e.g., 5 GHz, etc.) as that used by the Wi-Fi AP 150. The small cell 102' adopting NR in an unlicensed spectrum may boost the coverage of the access network and / or increase the capacity of the access network.

[0053] The electromagnetic spectrum is generally subdivided into various categories, frequency bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating frequency bands have been identified as frequency range designations FR1 (410 MHz – 7.125 GHz) and FR2 (24.25 GHz – 52.6 GHz). Although a part of FR1 is greater than 6 GHz, in various documents and articles, FR1 is generally (interchangeably) referred to as the "sub-6 GHz" band. A similar naming issue sometimes occurs with respect to FR2. Although different from the extremely high frequency (EHF) band (30 GHz – 300 GHz) identified by the International Telecommunication Union (ITU) as the "millimeter wave" band, FR2 is generally (interchangeably) referred to as the "millimeter wave" band in various documents and articles.

[0054] The frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating frequency bands of these mid-band frequencies as frequency range designations FR3 (7.125 GHz – 24.25 GHz). The frequency bands falling within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus can effectively extend the features of FR1 and / or FR2 into the mid-band frequencies. Additionally, higher frequency bands are currently being explored to extend 5G NR operation above 52.6 GHz. For example, three higher operating frequency bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz – 71 GHz), FR4 (52.6 GHz – 114.25 GHz), and FR5 (114.25 GHz – 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0055] Taking into account the above aspects, unless otherwise specifically stated, it should be understood that if used herein, terms such as sub-"6 GHz" can generally represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. Additionally, unless otherwise specifically stated, it should be understood that if used herein, terms such as "millimeter wave" can generally represent frequencies that can include mid-band frequencies, can be within FR2, FR4, FR4-a, or FR4-1 and / or FR5, or can be within the EHF band.

[0056] Whether it is the small cell 102' or the large cell (e.g., macro base station), the base station 102 can include and / or be referred to as an eNB, a g Node B (gNB), or another type of base station. Some base stations (such as the gNB 180) can operate in the traditional sub-6 GHz spectrum, at millimeter wave frequencies, and / or at near millimeter wave frequencies to communicate with the UE 104. When the gNB 180 operates at millimeter wave frequencies or near millimeter wave frequencies, the gNB 180 can be referred to as a millimeter wave base station. The millimeter wave base station 180 can utilize beamforming 182 with the UE 104 to compensate for path loss and short range. The base station 180 and the UE 104 can each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate beamforming.

[0057] The base station 180 can transmit the beamformed signal to the UE 104 in one or more transmission directions 182'. The UE 104 can receive the beamformed signal from the base station 180 in one or more reception directions 182". The UE 104 can also transmit the beamformed signal to the base station 180 in one or more transmission directions. The base station 180 can receive the beamformed signal from the UE 104 in one or more reception directions. The base station 180 / UE 104 can perform beam training to determine the optimal reception direction and transmission direction for each of the base station 180 / UE 104. The transmission direction and reception direction of the base station 180 can be the same or can be different. The transmission direction and reception direction of the UE 104 can be the same or can be different.

[0058] The EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may communicate with a Home Subscriber Server (HSS) 174. The MME 162 is a control node that processes signaling between the UE 104 and the EPC 160. Generally, the MME 162 provides bearer and connection management. All User Internet Protocol (IP) packets are routed through the Serving Gateway 166, which is itself connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation and other functions. The PDN Gateway 172 and the BM-SC 170 are connected to an IP service 176. The IP service 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functions for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area for a particular broadcast service, and may be responsible for session management (start / stop) and for collecting eMBMS-related charging information.

[0059] The core network 190 may include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. The AMF 192 may communicate with a Unified Data Management (UDM) 196. The AMF 192 is a control node that processes signaling between the UE 104 and the core network 190. Generally, the AMF 192 provides QoS flow and session management. All User Internet Protocol (IP) packets are routed through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to an IP service 197. The IP service 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a Packet Switched (PS) Streaming (PSS) service, and / or other IP services.

[0060] The base station may include and / or be referred to as a gNB, Node B, eNB, access point, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmission reception point (TRP), or some other suitable term. The base station 102 provides an access point for the UE 104 to the EPC 160 or the core network 190. Examples of the UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptop devices, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electricity meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similar functional devices. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, fuel pumps, ovens, vehicles, heart monitors, etc.). The UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

[0061] Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar fields, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0062] Figure 2A FIG. 200 is an example showing the first subframe within the 5G NR frame structure. Figure 2B FIG. 230 is an example showing the DL channels within the 5G NR subframe. Figure 2C FIG. 250 is an example showing the second subframe within the 5G NR frame structure. Figure 2D FIG. 280 is an example showing the UL channels within the 5G NR subframe. The 5G NR frame structure may be frequency division duplexing (FDD), where for a specific set of subcarriers (carrier system bandwidth), the subframes within that set of subcarriers are dedicated to either DL or UL; or it may be time division duplexing (TDD), where for a specific set of subcarriers (carrier system bandwidth), the subframes within that set of subcarriers are dedicated to both DL and UL. In Figure 2A 、 2CIn the provided example, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL) and subframe 3 is configured with slot format 1 (all UL), where D is DL, U is UL, and F is for flexible use between DL / UL. Although subframes 3 and 4 are shown as having slot formats 1 and 28 respectively, any particular subframe can be configured with any of the various available slot formats 0 - 61. Slot formats 0 and 1 are all-DL and all-UL respectively. The other slot formats 2 - 61 include a mixture of DL, UL, and flexible symbols. The UE is configured with a slot format by the received Slot Format Indicator (SFI) (configured dynamically via Downlink Control Information (DCI), or semi-statically / statically via Radio Resource Control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure that is TDD.

[0063] Figures 2A - 2D The frame structure is illustrated, and aspects of the present disclosure can apply to other wireless communication technologies that may have different frame structures and / or different channels. One frame (10 ms) can be divided into 10 equal-sized subframes (1 ms). Each subframe can include one or more slots. A subframe can also include mini-slots, which can include 7, 4, or 2 symbols. Each slot can include 7 or 14 symbols, depending on whether the cyclic prefix (CP) is normal CP or extended CP. For normal CP, each slot can include 14 symbols, while for extended CP, each slot can include 7 symbols. The symbols on the DL can be Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) symbols. The symbols on the UL can be CP-OFDM symbols (for high throughput scenarios) or Discrete Fourier Transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols) (for power-constrained scenarios; limited to single-stream transmission). The number of slots within a subframe is based on the CP and the numerology. Numerology defines the subcarrier spacing (SCS), and effectively defines the symbol length / duration, which is equal to 1 / SCS.

[0064]

[0065] For normal CP (14 symbols / slot), different numerologies μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe respectively. For extended CP, numerology 2 allows 4 slots per subframe. Accordingly, for normal CP and numerology μ, there are 14 symbols / slot and 2 μ slots / subframe. The subcarrier spacing can be equal to 2 μ*15 kHz, where μ is a parameter designed from 0 to 4. Thus, the parameter design μ = 0 has a subcarrier spacing of 15 kHz, while the parameter design μ = 4 has a subcarrier spacing of 240 kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figures 2A to 2D An example is provided for a normal CP of 14 symbols per time slot and a parameter design μ = 2 with 4 time slots per subframe. The time slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) that are frequency division multiplexed (see Figure 2B ). Each BWP may have a specific parameter design and CP (normal or extended).

[0066] A resource grid can be used to represent the frame structure. Each time slot includes a resource block (RB) (also known as a physical RB (PRB)) that extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0067] As Figure 2A explained, some REs carry reference (pilot) signals (RSs) for the UE. The RS may include a demodulation RS (DM-RS) for channel estimation at the UE (denoted as R for a specific configuration, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS). The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0068] Figure 2BExamples of various DL channels within a subframe of an explanatory frame. The Physical Downlink Control Channel (PDCCH) carries DCI within one or more Control Channel Elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including 6 Resource Element Groups (REGs), each REG including 12 consecutive Resource Elements (REs) in the OFDM symbols of an RB. The PDCCH within a BWP can be referred to as a Control Resource Set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., a common search space, a UE-specific search space) during a PDCCH monitoring occasion on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs can be located at higher and / or lower frequencies across the channel bandwidth. The Primary Synchronization Signal (PSS) can be in symbol 2 of a specific subframe of a frame. The PSS is used by the UE 104 to determine subframe / symbol timing and the physical layer identity. The Secondary Synchronization Signal (SSS) can be in symbol 4 of a specific subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the Physical Cell Identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. The Physical Broadcast Channel (PBCH) carrying the Master Information Block (MIB) can be logically grouped with the PSS and SSS to form a Synchronization Signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the number of RBs in the system bandwidth and the System Frame Number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH (such as System Information Blocks (SIBs)), and paging messages.

[0069] As explained in Figure 2C Some REs carry DM-RS for channel estimation at the base station (indicated as R for a specific configuration, but other DM-RS configurations are possible). The UE can transmit DM-RS for the Physical Uplink Control Channel (PUCCH) and DM-RS for the Physical Uplink Shared Channel (PUSCH). The PUSCH DM-RS can be transmitted in the previous one or two symbols of the PUSCH. The PUCCH DM-RS can be transmitted in different configurations depending on whether a short PUCCH or a long PUCCH is transmitted and depending on the specific PUCCH format used. The UE can transmit a Sounding Reference Signal (SRS). The SRS can be transmitted in the last symbol of a subframe. The SRS can have a comb structure, and the UE can transmit the SRS on one of the combs. The SRS can be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0070] Figure 2DExamples of various UL channels within a subframe of a demodulation reference signal. The PUCCH may be located at the position indicated in one configuration. The PUCCH carries uplink control information (UCI), such as a scheduling request, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and a hybrid automatic repeat request (HARQ) acknowledgement (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACKs and / or negative ACKs (NACKs)). The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0071] Figure 3 is a block diagram of a wireless device 350 in communication with another wireless device 310 in an access network. In some examples, the wireless device 310 may be a base station in communication with a UE (e.g., device 350). In other examples, the wireless device 310 or 350 may be an IAB node. For example, device 310 may be an IAB node and device 350 may be a child node or a UE. In other examples, the wireless device 310 may be a base station and the wireless device 350 may be an IAB node. In the DL, IP packets from the EPC 160 may be provided to the controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes the radio resource control (RRC) layer, and layer 2 includes the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, and the media access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with the broadcast of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reports; PDCP layer functionality associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs), error correction via ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with the mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel priority differentiation.

[0072] The transmit (TX) processor 316 and the receive (RX) processor 370 implement the layer 1 functionality associated with various signal processing functions. Layer 1, which includes the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The encoded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to OFDM subcarriers, multiplexed with reference signals (e.g., pilots) in the time and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a stream of time-domain OFDM symbols. The OFDM stream is space precoded to generate multiple spatial streams. Channel estimates from the channel estimator 374 may be used to determine the encoding and modulation schemes as well as for spatial processing. The channel estimates may be derived from reference signals transmitted by the device 350 and / or channel status feedback. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX modulates a radio frequency (RF) carrier with the corresponding spatial stream for transmission.

[0073] At the device 350, each receiver 354RX receives signals via its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to the receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement the layer 1 functionality associated with various signal processing functions. The RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the device 350. If there are multiple spatial streams destined for the device 350, they may be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then uses a fast Fourier transform (FFT) to transform the OFDM symbol stream from the time domain to the frequency domain. The frequency-domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signals, are recovered and demodulated by determining the signal constellation points that are most likely to have been transmitted by the wireless device 310. These soft decisions may be based on the channel estimates computed by the channel estimator 358. These soft decisions are then decoded and deinterleaved to recover the original data and control signals transmitted by the wireless device 310 on the physical channel. These data and control signals are then provided to the controller / processor 359 that implements layer 3 and layer 2 functionality.

[0074] The controller / processor 359 may be associated with a memory 360 that stores program code and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using the ACK and / or NACK protocols to support HARQ operations.

[0075] Similar to the functionality described in connection with DL transmissions performed by the wireless device 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) capture, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (ciphering, deciphering, integrity protection, integrity verification); RLC layer functionality associated with the transfer of upper layer PDUs, error correction via ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and re-ordering of RLC data PDUs; and MAC layer functionality associated with the mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel prioritization.

[0076] Channel estimates derived by the channel estimator 358 from reference signals or feedback transmitted by the wireless device 310 may be used by the TX processor 368 to select an appropriate coding and modulation scheme and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.

[0077] UL transmissions are processed at the wireless device 310 in a manner similar to that described in connection with the receiver functionality at the device 350. Each receiver 318RX receives signals via its respective corresponding antenna 320. Each receiver 318RX recovers the information modulated onto the RF carrier and provides the information to the RX processor 370.

[0078] The controller / processor 375 may be associated with a memory 376 that stores program code and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the device 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using the ACK and / or NACK protocols to support HARQ operations.

[0079] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform aspects associated with Figure 1 the measurement component 198.

[0080] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform aspects associated with Figure 1 the SIM configuration component 199.

[0081] Figure 4 FIG. is a diagram illustrating an IAB network 400. The IAB network 400 may include an anchor node (which may be referred to herein as an “IAB donor”) 410 and access nodes (which may be referred to herein as “IAB nodes”) 420. The IAB donor 410 may be a base station, such as a gNB or an eNB, and may perform functions for controlling the IAB network 400. The IAB nodes 420 may include L2 relay nodes, etc. The IAB donor 410 and the IAB nodes 420 together share resources to provide an access network and a backhaul network to the core network 490. For example, resources may be shared between access links and backhaul links in the IAB network.

[0082] The UE 430 interfaces with the IAB node 420 or the IAB donor 410 via an access link 470. The IAB nodes 420 communicate with each other and with the IAB donor 410 via a backhaul link 460. The IAB donor 410 is connected to the core network 490 via a wired backhaul link 450. The UE 430 communicates with the core network by relaying messages to the IAB network 400 via their respective access links 470, and the IAB network 400 may then relay the message to the IAB donor 410 via the backhaul link 460 for communication with the core network via the wired backhaul link 450. Similarly, the core network may communicate with the UE 430 by sending a message to the IAB donor 410 via the wired backhaul link 450. The IAB donor 410 sends the message to the IAB node 420 connected to the UE 430 via the IAB network 400 via the backhaul link 460, and the IAB node 420 sends the message to the UE 430 via the access link 470.

[0083] Each IAB node (e.g., including IAB donor 410 and each IAB node 420) may use a PCI value. The PCI value may be used as an identifier for the IAB donor 410 or the IAB node 420. The PCI value may be used to determine the scrambling sequence applied to the physical signals and / or channels transmitted by a specific IAB node. For example, the PSS and / or SSS transmitted by the corresponding IAB donor 410 or IAB node 420 may be scrambled using a scrambling sequence based on the PCI used by the corresponding IAB node. The network may have a limited number of available PCI values. For example, a 5G NR system may support 1008 PCI values. Accordingly, a given PCI value may be reused in the same network.

[0084] Figure 5 is a diagram illustrating the IAB network 500 and its components. The IAB network 500 includes an IAB donor 510 and IAB nodes 520. The IAB nodes and the IAB donor may provide wireless access links to UEs 530a-c.

[0085] The IAB donor 510 may be considered as the root node of the tree structure of the IAB network 500. The IAB donor node 510 may be connected to the core network 590 via a wired connection 591. The wired connection may include, for example, a wired optical fiber. The IAB donor node 510 may provide connections to one or more IAB nodes 520a. Each IAB node 520a may be referred to as a child node of the IAB donor node 510. The IAB donor node 510 may also provide connections to one or more UEs 530a, and the one or more UEs 530a may be referred to as child UEs of the IAB donor 510. The IAB donor 510 may be connected to its child IAB nodes 520a via a backhaul link 560, and may be connected to child UEs 530a via an access link 570. The IAB nodes 520a that are child nodes of the IAB node 510 may also have (an) IAB node(s) 520b and / or (a) UE(s) 530b as child nodes. For example, the IAB node 520b may be further connected to child nodes and / or child UEs. Figure 5 Illustrates the IAB node 520b providing an access link to the UE 530c, respectively.

[0086] The IAB donor 510 may include a Central Unit (CU) and a Distributed Unit (DU). The Central Unit CU may provide control over the IAB nodes 520a, 520b in the IAB network 500. For example, the CU may be responsible for the configuration of the IAB network 500. The CU may perform RRC / PDCP layer functions. The DU may perform scheduling. For example, the DU may schedule resources for communication by the child IAB nodes 520a and / or UEs 530a of the IAB donor 510.

[0087] The IAB nodes 520a, 520b may include a mobile terminal (MT) and a DU. The MT of the IAB node 520a may operate as a scheduled node and be scheduled by the DU of a parent node (e.g., the IAB donor 510) similarly to the UE 530a. The MT of the IAB node 520b may operate as a scheduled node of the parent node 520a. The DU may schedule the child IAB node 520b and the UE 530b of the IAB node 520a. The IAB node may provide a connection to an IAB node that in turn provides a connection to another IAB node. The mode of the parent IAB node including the DU that schedules the child IAB node / child UE may continue to more connections as explained in Figure 5 the following.

[0088] A wireless device may transmit and receive communications in the first four (FD) modes in which the device transmits and receives communications at overlapping times. Full duplex may involve, for example, simultaneous uplink and downlink transmissions. Flexible time division duplex (TDD) operation may support full duplex communication. In a wireless communication system that supports FD communication, the wireless device may experience self-interference that degrades the communication. Self-interference may occur when a signal transmitted from a transmitting device leaks to the transmitting device's own receiving port (e.g., is received by the receiving port). The transmitting device may cause interference to its own reception when transmitting and receiving at least partially overlapping in time. Additionally, the transmitted signal may be reflected by an object back to the receiving port, which may be referred to as clutter echo. As used herein, "clutter echo" refers to a signal transmitted by a device, reflected by an object (referred to herein as "clutter"), and received by the device's own receiver. Reducing self-interference, especially clutter echo, by appropriately selecting transmit and receive beams or more advanced transmit / receive beamforming via spatial separation may help support FD communication. FD communication allows for simultaneous UL and DL transmissions in FR2 and different associated aspects of the procedures. Flexible TDD capabilities may exist at the base station (e.g., gNB) or the UE or both. For example, a UE in FD communication may transmit UL from one antenna panel and receive DL in another antenna panel. FD communication may be conditional on UL / DL beam separation. FD communication may result in reduced latency such that it may be possible to receive a DL signal in only a UL time slot. At least another benefit is that FD communication may provide enhanced spectral efficiency (e.g., per cell or per UE), which may allow for improved efficient resource utilization.

[0089] Flexible TDD capabilities including FD capabilities can be capabilities of a UE, a base station, an IAB node, a parent node, and / or a child node. For example, a UE may be able to transmit an uplink transmission from one antenna panel while performing downlink reception with another antenna panel. In some aspects, the capabilities may be conditional, based on beam separation, use of different panels, etc.

[0090] Flexible TDD capabilities and FD modes can reduce the latency of communication by transmitting and receiving simultaneously. For example, receiving a downlink signal in an uplink time slot can enable the UE to receive downlink communication from the base station faster and reduce the latency of such communication. The spectral efficiency can be improved, including per cell and / or per UE. The FD mode can provide more efficient resource utilization.

[0091] Self-interference measurements can be performed to determine whether FD capabilities can be supported or enabled / enhanced at a wireless device. To perform self-interference measurements, a wireless device can send a signal from a first set of antennas in one or more transmit beam directions and can measure the received signal (e.g., the reflected or leaked transmission signal) on a second set of antennas in one or more receive beam directions.

[0092] In some instances, a wireless device can receive a configuration from a network entity to perform self-interference measurements. The network entity can provide the configuration / resources for the wireless device to perform self-interference measurements. The network entity can configure the wireless device to provide a report of the self-interference measurements. The network entity can determine the FD capabilities, status, and / or performance of the wireless device based on the received self-interference report. However, the network entity may not account for clutter echoes when configuring the wireless device to perform self-interference measurements.

[0093] In some instances, a wireless device can be configured to perform self-interference measurements without specific instructions from a network entity. For example, a network entity (e.g., a distributed unit (DU)) can send a downlink signal (e.g., an SSB / CSI-RS). The wireless device can measure what level of downlink signal is received on its receive ports / antennas in terms of reference signal received power (RSRP). In another example, if a UE or a mobile terminal (MT) is scheduled to transmit an uplink signal (e.g., an SRS), then the UE or MT can perform self-interference measurements on its receive ports / antennas. In some instances, the wireless device may not provide any report of the self-interference measurements to another entity (e.g., the network). The wireless device can use the self-interference measurements to determine whether it can support FD or perform beam tuning. However, the wireless device may not account for clutter echoes when performing self-interference measurements.

[0094] Figures 6A - 6CFIG. is a diagram illustrating examples 600, 610, 620 of full duplex (FD) communication. Figure 6A Example 600 includes UE1 602 and two base stations (e.g., TRPs) 604-1, 604-2, where UE1 602 is, for example, transmitting an uplink transmission to base station 604-1 and receiving a downlink transmission from base station 604-2 in a time-overlapped simultaneous manner. In some aspects, 604-1 and 604-2 or 604 may represent IAB nodes. In Figure 6A Example 600, FD is enabled for UE1 602 but not for base stations 604-1, 604-2. Figure 6B Example 610 includes two UEs - UE1 602-1 and UE2 602-2 - and base station 604, where UE1 602-1 is, for example, receiving a downlink transmission from base station 604 in a time-overlapped simultaneous manner and UE2 602-2 is transmitting an uplink transmission to base station 604. In Figure 6B Example 610, FD is enabled for base station 604 but not for the UEs (UE1 602-1 and UE2 602-2). Figure 6C Example 620 includes UE1 602 and base station 604, where UE1 602 is, for example, receiving a downlink transmission from base station 604 in a time-overlapped manner and UE1 602 is transmitting an uplink transmission to the same base station 604. In Figure 6C Example 620, FD is enabled for both UE1 602 and base station 604.

[0095] This disclosure relates to improving ways of configuring self-interference measurement. The self-interference measurement configuration may be adjusted in response to detected clutter echoes. For example, a wireless device may be configured to detect clutter echoes and may report such results to a network entity such that the network entity may adjust the self-interference configuration. In another example, a wireless device may be configured to detect clutter echoes and may request a self-interference measurement configuration in view of the detected clutter echoes. Configuring the self-interference measurement to account for detected clutter echoes may facilitate performing the self-interference measurement. Thus, it is desirable to improve the way of configuring the self-interference measurement to allow for detecting clutter echoes.

[0096] Beam separation of transmit and receive beams helps to limit or reduce self-interference that may occur during FD communication. It is desirable to account for clutter echoes when configuring the self-interference measurement to minimize self-interference. Determining the presence of clutter echoes may allow for adjusting the self-interference measurement configuration, which may provide reliable FD communication by selecting beam pairs that minimize or reduce self-interference.

[0097] Figure 7is a call flow diagram 700 between a first wireless device 702 and a second wireless device 704. In some aspects, the first wireless device 702 can be a UE, and the second wireless device 704 can be a base station, where the base station provides a cell that serves the UE. In other examples, the first wireless device 702 can be a UE, and the second wireless device 704 can be an IAB node. In other examples, the first wireless device can be an IAB node (e.g., a child node) and the second wireless device can be a parent IAB node, a central unit, a donor node, or a base station. For example, in Figure 1 the context of, the second wireless device 704 can correspond to the base station 102 / 180 or the IAB node 103, and correspondingly, the cell can include a geographic coverage area 110 where communication coverage is provided and / or a small cell 102' having a coverage area 110'. Additionally, the first wireless device 702 can correspond to the UE 104 or the IAB node 103. In another example, in Figure 3 the context of, the second wireless device 704 can correspond to the device 310, and the first wireless device 702 can correspond to the device 350.

[0098] As Figure 7 illustrated, at 706, the first wireless device 702 can perform a measurement. The measurement can be configured to indicate clutter echoes in the estimated location. The first wireless device 702 can perform the measurement at 706 before receiving a SIM configuration from the second wireless device 704.

[0099] The first wireless device 702 can report information about the clutter echoes to the second wireless device 704. The first wireless device 702 can report 708 information about the clutter echoes to the second wireless device 704 based on a prior measurement (e.g., measurement 706) before receiving a SIM configuration having one or more parameters for clutter echo detection. In some aspects, the information can include a reception timing that the first wireless device can report to the second wireless device. The second wireless device 704 receives the report 708 from the first wireless device 702

[0100] In some aspects, the first wireless device 702 can request at least one configuration parameter at 710. The at least one configuration parameter can include at least one of the following: increased transmit power, timing configuration, one or more beam directions, or an angular offset within an indicated direction range for clutter echo detection. The second wireless device 704 receives the request for the at least one configuration parameter.

[0101] At 712, the second wireless device 704 may transmit a SIM configuration. The SIM configuration may have one or more parameters dedicated to clutter echo detection that are different from other types of SIMs. In some aspects, one or more parameters for clutter echo detection include increased transmit power. In some aspects, based on the increased transmit power, the increased transmit power may be used for one or more of the following: uplink sounding reference signal (SRS), uplink demodulation reference signal (DMRS), physical uplink shared channel (PUSCH), or physical uplink control channel (PUCCH).

[0102] In some aspects, one or more parameters for clutter echo detection include one or more timing parameters. Since clutter echoes may come from remote reflectors, the SIM may include a propagation delay that is longer than that of a nearby reflector. The configured timing parameters for clutter echo detection may help avoid problems caused by the longer propagation delay. The one or more timing parameters may include adjusted transmission timing. In some aspects, the adjusted transmission timing may indicate an offset that can be applied to the timing alignment value transmitted by the second wireless device to assist in improving timing alignment. The adjusted transmission timing may provide alignment that avoids leakage into adjacent symbols (e.g., symbols adjacent to the symbols used for the SIM) due to reflection of the transmitted signal. One or more timing parameters configured for clutter echo detection may include the configuration of a guard period on a symbol adjacent to the symbol for measuring the self-interference caused by the clutter echo. The guard period may help avoid the reflection of the transmitted signal affecting the transmission in subsequent symbols. One or more timing parameters configured for clutter echo detection may include an increased measurement window. For example, the measurement window may include one or more additional symbols in addition to the symbol in which the SIM signal has been transmitted. The added one or more symbols may be reserved from being used for other data or RS transmissions to avoid leakage from the SIM for clutter echoes. For example, if five symbols will be used for the SIM, the measurement window may include more than five symbols, e.g., 6 or 7 symbols. The increased number of symbols provides a gap or guard period between the symbols in which the signal is transmitted, which is similar to the configuration of the guard period. One or more timing parameters configured for clutter echo detection may include an indication for the first wireless device to measure and report round-trip timing (RTT) information. The RTT information may enable the second wireless device 704 to determine the timing adjustment to be configured for the first wireless device 702.

[0103] In some aspects, one or more parameters for clutter echo detection may include additional resources for the SIM for clutter echo detection. For example, a second wireless device may configure a more thorough transmit / receive beam sweep for a first wireless device 702 to identify the direction of a clutter echo, such as an increased range for TX and / or RX beam sweeps. In some aspects, the increased beam sweep for the SIM for clutter echo detection may be relative to normal self-interference measurements. For example, to detect the directivity of a clutter echo, the second wireless device may configure a higher repetition value to sweep more or narrower beams to detect the location of the clutter echo. The additional resources may include one or more of the following: an increased TX and / or RX beam sweep for the SIM for clutter echo detection, a first indication to use a synchronization signal block (SSB) for the SIM for clutter echo detection, a second indication to use a channel state information reference signal (CSI-RS) for the SIM for clutter echo detection, or a third indication to use a sounding reference signal (SRS) transmission for the SIM for clutter echo detection. For example, the first wireless device 702 may be configured to perform a blind search based on the SRS transmission. The one or more parameters may provide an increased opportunity for the first wireless device 702 to detect or identify the direction of a clutter echo.

[0104] In some aspects, one or more parameters for clutter echo detection may include a direction range for clutter echo detection. For example, if a second wireless device has information about the location of a clutter echo, the second wireless device may configure the first wireless device 702 to perform a SIM in a direction associated with the clutter echo (e.g., in a direction based on the location of the clutter echo). The direction range may be indicated based on at least one or more beam directions within an angular range or an angular offset of a beam. The direction may be indicated based on, for example, an absolute beam direction within an estimated angular range. Additionally or alternatively, the direction may be indicated based on an absolute or relative angular offset of a particular beam.

[0105] In some examples, the first wireless device 702 may have information about the direction or location of a clutter echo. The first wireless device 702 may report information about the clutter echo to the second wireless device 704. The first wireless device 702 may also request SIM configuration, e.g., SIM configuration based on or in response to information provided by the first wireless device 702. The first wireless device may request a higher transmit power, timing configuration, one or more beam directions, angular offset, etc. The first wireless device 702 may also report receive timing to the second wireless device 704 to assist in configuring timing adjustments.

[0106] In some aspects, the first wireless device can be a base station and the second wireless device can be a UE. In some aspects, the second wireless device is an IAB node and the first wireless device is a parent IAB node or a child node. The first wireless device 702 receives a SIM configuration from the second wireless device 704 that has one or more parameters dedicated to clutter echo detection that are different from other types of SIMs.

[0107] At 714, the first wireless device 702 can execute a SIM for clutter echo detection. The first wireless device 702 can execute the SIM in response to receiving the SIM configuration 712 from the second wireless device 704. The first wireless device can execute the SIM for clutter echo detection based on the SIM configuration. In some aspects, to execute the SIM for clutter echo detection, the first wireless device can transmit one or more of an uplink sounding reference signal, an uplink demodulation reference signal, a physical uplink shared channel, or a physical uplink control channel based on an increased transmit power. In some aspects, the first wireless device executes the SIM for clutter echo detection in a full-duplex mode.

[0108] In some aspects, the first wireless device 702 can receive a configuration of half-duplex resources from the second wireless device 704. The first wireless device can use the half-duplex resources to execute the SIM for clutter echo detection. In some aspects, the first wireless device can detect the occurrence of a clutter echo. The first wireless device can request a SIM training window in response to detecting the occurrence of a clutter echo. The first wireless device can receive a configuration of the SIM training window from the second wireless device. The first wireless device can execute the SIM for clutter echo detection during the SIM training window.

[0109] In some examples, the second wireless device 704 can configure the first wireless device 702 to report information beams that experience clutter echoes or have a lower quality. Such beams can be considered as poor beam directions for the first wireless device 702. For example, the first wireless device 702 can report N beams with the maximum SI-RSRP, where N is an integer greater than or equal to zero that is configured. At 716, the first wireless device 702 can report one or more beams that have the maximum self-interference RSRP due to clutter echoes. In some aspects, the first wireless device can report the one or more beams by indicating the CSI-RS identifier (ID) of each of the one or more beams. For example, the first wireless device 702 can report the beams by indicating the corresponding index or identifier (such as the CSI-RS ID of each of these N beams) to the second wireless device 704. The beams can have a one-to-one relationship with the CSI-RS ID or other reference signals. The second wireless device 704 receives a report from the first wireless device 702 of one or more beams that have the maximum self-interference RSRP due to clutter echoes.

[0110] Figure 8 is a call flow diagram 800 between a first wireless device 802 and a second wireless device 804. In some aspects, the first wireless device 802 can be a UE, and the second wireless device 804 can be a base station, where the base station provides a cell that serves the UE. In other examples, the first wireless device 702 can be a UE, and the second wireless device 704 can be an IAB node. In other examples, the first wireless device can be an IAB node (e.g., a child node) and the second wireless device can be a parent IAB node, a central unit, a donor node, or a base station. For example, in Figure 1 context, the second wireless device 804 can correspond to the base station 102 / 180 or the IAB node 103, and correspondingly, the cell can include a geographical coverage area 110 where communication coverage is provided and / or a small cell 102' having a coverage area 110'. In addition, the first wireless device 802 can correspond to at least the UE 104 or the IAB node 103. In another example, in Figure 3 context, the second wireless device 804 can correspond to a device 310 (e.g., a base station, an IAB node, etc.), and the first wireless device 802 can correspond to a device 350 (e.g., a UE, an IAB node, a child node, etc.).

[0111] In contrast to the example in Figure 7 , in Figure 8 , the first wireless device 702 can perform autonomous clutter echo detection or can perform clutter echo detection based on minimal or limited configuration information from the second wireless device 704.

[0112] As Figure 8 illustrates, at 806, the first wireless device 802 can transmit an uplink signal. The uplink signal can include an uplink SRS, an uplink DMRS, a PUSCH, or a PUCCH. In some aspects, the first wireless device 802 is a UE. In some aspects, the first wireless device 802 is an IAB node or a child node. The second wireless device 804 receives the uplink signal from the first wireless device 802.

[0113] At 808, the first wireless device 802 may determine to perform a SIM for clutter echo detection. The first wireless device may autonomously determine to perform a SIM for clutter echo detection without an instruction from the second wireless device. In some examples, the first wireless device 802 may perform the SIM without a configuration from the second wireless device 804 (e.g., without a network configuration). In this example, the network may be transparent to the SIM measurements performed by the first wireless device 802. Alternatively, the first wireless device 802 may perform the SIM in a stand-alone manner and based on minimal or limited network configuration for clutter echo detection, such as an echo detection window or resources for clutter echo reporting.

[0114] In some aspects, at 810, the first wireless device 802 may request measurement resources. The first wireless device 802 may request measurement resources from the second wireless device. The second wireless device 804 may receive a request from the first wireless device 802 for measurement resources for the SIM for clutter echo detection. In some aspects, the measurement resources may include a SIM window. In some aspects, the measurement resources may include half-duplex resources.

[0115] In some aspects, at 812, the second wireless device 804 may transmit a configuration of the measurement resources. The second wireless device 804 may transmit the configuration of the measurement resources to the first wireless device 802. In some aspects, the first wireless device 802 may receive the configuration of the window from the second wireless device 804. When the first wireless device 802 determines to perform the SIM, the first wireless device 802 may perform the SIM based on the configured window. Additionally or alternatively, when the first wireless device 802 determines to perform the SIM, the first wireless device 802 may report the SIM to the second wireless device 804 in the configured reporting resources.

[0116] In some examples, the configuration from the second wireless device 804 may come in response to a request from the first wireless device 802. In other examples, the second wireless device 804 may determine whether or when to provide a configuration of measurement or reporting resources to the first wireless device 802.

[0117] In some examples, the configuration may include a periodic SRS for the first wireless device 802 to perform transmit beam sweeping. The first wireless device 802 may use the SRS to perform the SIM.

[0118] The first wireless device 802 may detect the occurrence of clutter echoes. The first wireless device 802 may request a SIM training window from the second wireless device 804. The first wireless device may request a SIM training window in response to detecting the occurrence of clutter echoes. The second wireless device 804 may transmit the configuration of the SIM training window in response to a request from the first wireless device 802. The first wireless device 802 may receive the configuration of the SIM training window from the second wireless device 804. The first wireless device 802 may perform SIM for clutter echo detection during the SIM training window.

[0119] At 814, the first wireless device 802 may perform SIM for clutter echo detection. The first wireless device 802 may perform SIM for clutter echoes based on measurements of uplink SRS, uplink DMRS, PUSCH, or PUCCH. In some aspects, the first wireless device 802 may perform SIM for clutter echo detection within the window received in the configuration from the second wireless device. In some aspects, the first wireless device 802 may perform SIM for clutter echo detection in a half-duplex mode. In some aspects, the first wireless device may perform SIM for clutter echo detection in a full-duplex mode.

[0120] In some aspects, the first wireless device 802 may request reporting resources for clutter echo detection. The first wireless device 802 may request reporting resources for clutter echo detection from the second wireless device 804. In some aspects, the first wireless device 802 may receive the configuration of the reporting resources. The first wireless device 802 may receive the configuration of the reporting resources from the second wireless device 804.

[0121] At 816, the first wireless device 802 may report one or more beams having the maximum self-interference RSRP due to clutter echoes. Similar to Figure 7 the example in, the first wireless device 802 may report a set of N beams having the highest level of SI-RSRP. The first wireless device 802 may report the one or more beams to the second wireless device 804 in the reporting resources indicated by the second wireless device 804. The second wireless device 804 receives the report of one or more beams having the maximum self-interference RSRP due to clutter echoes.

[0122] In some aspects, the first wireless device 702 or 802 may receive a configuration of half-duplex resources from the second wireless device 704 or 804. The first wireless device 702 or 802 may use the half-duplex resources to perform a SIM for echo cancellation detection, for example, before indicating its full-duplex capability to the second wireless device 704 or 804. The first wireless device 702 or 802 may report the SIM to the second wireless device 704 or 804 and may indicate the full-duplex capability. Then, the second wireless device 704 or 804 may configure the first wireless device 702 or 802 for full-duplex communication.

[0123] In some aspects, the first wireless device may be configured to perform a SIM for echo cancellation detection in full-duplex mode. The second wireless device 704 or 804 may schedule downlink communication to avoid the SIM measurement window of the first wireless device 702 or 802. In some examples, the network may configure half-duplex time slots for the UE or the IAB node. The UE or the IAB node may use the half-duplex time slots to perform a SIM for echo cancellation detection. In other examples, the UE or the IAB node may detect the occurrence of a trigger event (e.g., echo cancellation), and in response, may request a SIM training window for echo cancellation detection.

[0124] Figure 9 FIG. 900 is a flowchart of a method of wireless communication at a first wireless device. The method may be performed by an IAB node or a UE or a component of an IAB node or a UE (e.g., IAB nodes 103, 410, 420, 510, 520a, 520b; devices 350, 702, 350,702, 802, 804; UEs 104, 430, 602; apparatus 1102; cellular baseband processor 1104, which may include a memory 360 and may be the entire device 350 or a component of the device 350, such as TX processor 368, RX processor 356, and / or controller / processor 359). One or more of the illustrated operations may be optional, omitted, swapped, or performed simultaneously. The method may enable the first wireless device to detect echo cancellation.

[0125] At 902, the first wireless device may receive SIM configuration. For example, 902 may be performed by the SIM configuration component 1146 of the apparatus 1102. The SIM configuration may have one or more parameters dedicated to clutter echo detection that are different from other types of SIMs. An example of another type of SIM different from the clutter echo-based SIM is SIM performed due to the transmitted signal being received directly at the receiver of the device (e.g., not reflected by clutter / objects). In some aspects, one or more parameters for clutter echo detection may include increased transmit power. In some aspects, one or more parameters for clutter echo detection include one or more timing parameters. The one or more timing parameters may include at least one of the following: adjusted transmission timing, guard period on a symbol adjacent to the symbol measuring the self-interference caused by measuring the clutter echo, increased measurement window, or indication for the first wireless device to measure and report RTT information. In some aspects, the adjusted transmission timing may indicate an offset that can be applied to the timing alignment value sent by the second wireless device (e.g., a network entity) to assist in improving timing alignment. In some aspects, one or more parameters for clutter echo detection include additional resources for the SIM for clutter echo detection. The additional resources may include one or more of the following: increased beam sweeping for the SIM for clutter echo detection, a first indication to use a synchronization signal block (SSB) for the SIM for clutter echo detection, a second indication to use a channel state information reference signal (CSI-RS) for the SIM for clutter echo detection, or a third indication to use a sounding reference signal (SRS) for the SIM for clutter echo detection. In some aspects, the increased beam sweeping for the SIM for clutter echo detection may be relative to normal self-interference measurement. For example, to detect the directionality of the clutter echo, the second wireless device may configure a higher repetition value to sweep more beams or narrower beams to detect the location of the clutter echo. In some aspects, one or more parameters for clutter echo detection include a direction range for clutter echo detection. The direction range may be indicated based on at least one beam direction within the angular range or the angular offset of the beam. In some aspects, the first wireless device is a UE. In some aspects, the first wireless device is an IAB node or a sub-node.

[0126] At 904, the first wireless device may execute a SIM for clutter echo detection. For example, 904 may be executed by the SIM component 1148 of the device 1102. The first wireless device may execute the SIM for clutter echo detection based on this SIM configuration. In some aspects, in order to execute the SIM for clutter echo detection, the first wireless device may transmit one or more of an uplink sounding reference signal, an uplink demodulation reference signal, a physical uplink shared channel, or a physical uplink control channel based on an increased transmit power. In some aspects, the first wireless device executes the SIM for clutter echo detection in a full-duplex mode.

[0127] At 906, the first wireless device may report one or more beams having the maximum self-interference RSRP due to clutter echoes. For example, 906 may be executed by the self-interference component 1158 of the device 1102. In some aspects, the first wireless device may report the one or more beams by indicating the CSI-RS ID of each of the one or more beams.

[0128] Figure 10 is a flowchart 1000 of a method for wireless communication at a first wireless device. The method may be executed by an IAB node or a UE or a component of an IAB node or a UE (e.g., IAB nodes 103, 410, 420, 510, 520a, 520b, 604, 704, 804; devices 350, 702, 802; UEs 104, 430, 602; device 1102; cellular baseband processor 1104, which may include a memory 360 and may be the entire device 350 or a component of the device 350, such as a TX processor 368, an RX processor 356, and / or a controller / processor 359). One or more of the illustrated operations may be optional, omitted, swapped, or performed simultaneously. The method may enable the first wireless device to detect clutter echoes.

[0129] At 1002, the first wireless device may perform a measurement. For example, 1002 may be executed by the measurement component 1140 of the device 1102. The measurement may indicate clutter echoes at the estimated location.

[0130] At 1004, the first wireless device may report information about clutter echoes. For example, 1004 may be executed by the reporting component 1142 of the device 1102. The first wireless device may report information about clutter echoes to a second wireless device. The first wireless device may report information about clutter echoes to the second wireless device based on a prior measurement. In some aspects, the first wireless device may report information about clutter echoes to the second wireless device before receiving a SIM configuration having one or more parameters for clutter echo detection. In some aspects, the information may include a reception timing that the first wireless device may report to the second wireless device.

[0131] At 1006, a first wireless device may request at least one configuration parameter. For example, 1006 may be performed by a request component 1144 equipped in 1102. The at least one configuration parameter requested by the first wireless device may include at least one of the following: increased transmit power, timing configuration, one or more beam directions, or an angular offset within an indicated direction range for clutter echo detection.

[0132] At 1008, the first wireless device may receive a SIM configuration. For example, 1008 may be performed by a SIM configuration component 1146 equipped in 1102. The SIM configuration may have one or more parameters dedicated to clutter echo detection that are different from other types of SIMs. In some aspects, the one or more parameters for clutter echo detection may include increased transmit power. In some aspects, the one or more parameters for clutter echo detection include one or more timing parameters. The one or more timing parameters may include at least one of the following: adjusted transmission timing, a guard period on a symbol adjacent to the symbol for measuring self-interference caused by measuring clutter echo, an increased measurement window, or an indication for the first wireless device to measure and report RTT information. In some aspects, the adjusted transmission timing may indicate an offset that can be applied to a timing alignment value transmitted by a second wireless device to assist in improving timing alignment. In some aspects, the one or more parameters for clutter echo detection may include additional resources for the SIM for clutter echo detection. The additional resources may include one or more of the following: increased beam sweeping for the SIM for clutter echo detection, a first indication to use a synchronization signal block (SSB) for the SIM for clutter echo detection, a second indication to use a channel state information reference signal (CSI-RS) for the SIM for clutter echo detection, or a third indication to use a sounding reference signal (SRS) for the SIM for clutter echo detection. In some aspects, the increased beam sweeping for the SIM for clutter echo detection may be relative to normal self-interference measurement. For example, to detect the directivity of clutter echo, the second wireless device may configure a higher repetition value to sweep more beams or narrower beams to detect the position of clutter echo. In some aspects, the one or more parameters for clutter echo detection may include a direction range for clutter echo detection. The direction range may be indicated based on at least one beam direction within an angular range or an angular offset of a beam. In some aspects, the first wireless device may include a UE. In some aspects, the first wireless device may include an IAB node or a sub-node.

[0133] At 1010, the first wireless device may execute a SIM for clutter echo detection. For example, 1010 may be executed by the SIM component 1148 of the equipped 1102. The first wireless device may execute the SIM for clutter echo detection based on this SIM configuration. In some aspects, in order to execute the SIM for clutter echo detection, the first wireless device may transmit one or more of an uplink sounding reference signal, an uplink demodulation reference signal, a physical uplink shared channel, or a physical uplink control channel based on an increased transmit power. In some aspects, the first wireless device executes the SIM for clutter echo detection in a full-duplex mode.

[0134] At 1012, the first wireless device may receive a configuration of half-duplex resources. For example, 1012 may be executed by the duplex component 1150 of the equipped 1102. The first wireless device may receive the configuration of half-duplex resources from a second wireless device. In some aspects, the first wireless device may use the half-duplex resources to execute the SIM for clutter echo detection.

[0135] At 1014, the first wireless device may detect the occurrence of clutter echoes. For example, 1014 may be executed by the detection component 1152 of the equipped 1102. In some aspects, the detection of the occurrence of clutter echoes may be based on a configuration for clutter echo detection configured by the network. In some aspects, the detection of the occurrence of clutter echoes may be based on a configuration for autonomous clutter echo detection of the first wireless device.

[0136] At 1016, the first wireless device may request a SIM training window. For example, 1016 may be executed by the window component 1154 of the equipped 1102. The first wireless device may request a SIM training window from a second wireless device. In some aspects, the first wireless device may request a SIM training window in response to detecting the occurrence of clutter echoes.

[0137] At 1018, the first wireless device may receive a configuration of the SIM training window. For example, 1018 may be executed by the configuration component 1156 of the equipped 1102. The first wireless device may receive the configuration of the SIM training window from a second wireless device. The first wireless device may execute the SIM for clutter echo detection during this SIM training window.

[0138] At 1020, the first wireless device may report one or more beams with the maximum self-interference RSRP due to clutter echoes. For example, 1020 may be executed by the self-interference component 1158 of the equipped 1102. In some aspects, the first wireless device may report the one or more beams by indicating the CSI-RS ID of each of the one or more beams.

[0139] Figure 11FIG. 1100 is a diagram illustrating an example of a hardware implementation of apparatus 1102. Apparatus 1102 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, device 1102 may include a cellular baseband processor 1104 (also referred to as a modem) coupled to a cellular RF transceiver 1122. In some aspects, apparatus 1102 may further include one or more subscriber identity module (SIM) cards 1120, an application processor 1106 coupled to a secure digital (SD) card 1108 and a screen 1110, a Bluetooth module 1112, a wireless local area network (WLAN) module 1114, a global positioning system (GPS) module 1116, or a power supply 1118. The cellular baseband processor 1104 communicates with UE 104 and / or BS 102 / 180 via the cellular RF transceiver 1122. The cellular baseband processor 1104 may include a computer-readable medium / memory. The computer-readable medium / memory may be non-transitory. The cellular baseband processor 1104 is responsible for general processing, including execution of software stored on the computer-readable medium / memory. The software, when executed by the cellular baseband processor 1104, causes the cellular baseband processor 1104 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 1104 when executing the software. The cellular baseband processor 1104 further includes a receiving component 1130, a communication manager 1132, and a transmitting component 1134. The communication manager 1132 includes the one or more illustrated components. The components within the communication manager 1132 may be stored in the computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 1104. The cellular baseband processor 1104 may be a component of device 350 and may include a memory 360 and / or at least one of the following: a TX processor 368, an RX processor 356, and a controller / processor 359. In one configuration, apparatus 1102 may be a modem chip and include only the baseband processor 1104, and in another configuration, apparatus 1102 may be an entire UE (e.g., see Figure 3 of 350) and include additional modules of apparatus 1102.

[0140] The communication manager 1132 includes a measurement component 1140 configured to perform prior measurements that may indicate clutter echoes in an estimated location, e.g., as described in conjunction with Figure 10 of 1002. The communication manager 1132 further includes a reporting component 1142 configured to report information about clutter echoes to a second wireless device, e.g., as described in conjunction with Figure 10as described in 1004. The communication manager 1132 further includes a request component 1144 configured to request at least one of the following: increased transmit power, timing configuration, one or more beam directions, or an angular offset within an indicated direction range for clutter echo detection, e.g., as described in conjunction with Figure 10 as described in 1006. The communication manager 1132 further includes a SIM configuration component 1146 configured to receive a SIM configuration having one or more parameters dedicated to clutter echo detection, e.g., as described in conjunction with Figure 9 902 or Figure 10 as described in 1008. The communication manager 1132 further includes a SIM component 1148 configured to perform a SIM for clutter echo detection based on the SIM configuration, e.g., as described in conjunction with Figure 9 904 or Figure 10 as described in 1010. The communication manager 1132 further includes a duplex component 1150 configured to receive a configuration of half-duplex resources, e.g., as described in conjunction with Figure 10 1012. The communication manager 1132 further includes a detection component 1152 configured to detect the occurrence of clutter echo, e.g., as described in conjunction with Figure 10 1014. The communication manager 1132 further includes a window component 1154 configured to request a SIM training window in response to detecting the occurrence of clutter echo, e.g., as described in conjunction with Figure 10 1016. The communication manager 1132 further includes a configuration component 1156 configured to receive a configuration of the SIM training window, e.g., as described in conjunction with Figure 10 1018. The communication manager 1132 further includes a self-interference component 1158 configured to report one or more beams having the maximum self-interference RSRP due to clutter echo, e.g., as described in conjunction with Figure 9 906 or Figure 10 1020.

[0141] The apparatus may include additional components that execute each block of the algorithm in the flowchart of Figure 9 or 10. Thus, Figure 9 each block in the flowchart of or 10 may be executed by a component and the apparatus may include one or more of those components. These components may be one or more hardware components specifically configured to execute the process / algorithm, implemented by a processor configured to execute the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0142] As shown, the apparatus 1102 can include various components configured for various functions. In one configuration, the apparatus 1102, specifically the cellular baseband processor 1104, includes means for receiving a SIM configuration for one or more parameters dedicated to clutter echo detection that are different from other types of SIMs. The apparatus includes means for performing the SIM for clutter echo detection based on the SIM configuration. The apparatus includes means for reporting one or more beams having the maximum self-interference RSRP due to clutter echoes. The apparatus further includes means for performing a prior measurement indicating clutter echoes at the estimated location. The apparatus further includes means for reporting information about clutter echoes to a second wireless device based on the prior measurement before receiving a SIM configuration having one or more parameters for clutter echo detection. The apparatus further includes means for requesting at least one of the following: increased transmit power, timing configuration, one or more beam directions, or an angular offset within the indicated direction range for clutter echo detection. The apparatus further includes means for receiving a configuration of half-duplex resources from the second wireless device, wherein the first wireless device uses the half-duplex resources to perform the SIM for clutter echo detection. The apparatus further includes means for detecting the occurrence of clutter echoes. The apparatus further includes means for requesting a SIM training window in response to detecting the occurrence of clutter echoes. The apparatus further includes means for receiving a configuration of the SIM training window from the second wireless device, wherein the first wireless device performs the SIM for clutter echo detection during the SIM training window. The means can be one or more of the components in the apparatus 1102 configured to perform the functions recited by the means. As described above, the apparatus 1102 can include a TX processor 368, an RX processor 356, and a controller / processor 359. Thus, in one configuration, the means can be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions recited by the means.

[0143] Figure 12FIG. 1200 is a flowchart of a method for wireless communication at a first wireless device. The method may be performed by an IAB node or a base station or a component of an IAB node or a base station (e.g., IAB nodes 103, 410, 420, 510, 520a, 520b; base stations 604, 604-1, 604-2; equipment 310, 704, 804; base stations 102, 180; device 1402; baseband unit 1404, which may include a memory 376 and may be the entire wireless device 310 or a component of the wireless device 310, such as a TX processor 316, an RX processor 370, and / or a controller / processor 375). One or more of the illustrated operations may be optional, omitted, swapped, or performed simultaneously. The method may enable the first wireless device to detect clutter echoes.

[0144] At 1202, the first wireless device may transmit a SIM configuration. For example, 1202 may be performed by the SIM configuration component 1444 of the apparatus 1402. The first wireless device may transmit the SIM configuration to a second wireless device. The SIM configuration may have one or more parameters dedicated to clutter echo detection that are different from other types of SIMs. In some aspects, one or more parameters for clutter echo detection include increased transmit power. In some aspects, based on the increased transmit power, the increased transmit power may be used for one or more of the following: uplink sounding reference signals, uplink demodulation reference signals, physical uplink shared channels, or physical uplink control channels. In some aspects, one or more parameters for clutter echo detection include one or more timing parameters. The one or more timing parameters may include at least one of the following: adjusted transmission timing, a guard period on a symbol adjacent to the symbol that measures the self-interference caused by the clutter echo, an increased measurement window, or an indication for the first wireless device to measure and report RTT information. In some aspects, the adjusted transmission timing may indicate an offset that can be applied to the timing alignment value transmitted by the first wireless device to assist in improving timing alignment. In some aspects, one or more parameters for clutter echo detection include additional resources for the SIM for clutter echo detection. The additional resources may include one or more of the following: increased beam sweeping for the SIM for clutter echo detection, a first indication to use SSB for the SIM for clutter echo detection, a second indication to use CSI-RS for the SIM for clutter echo detection, or a third indication to use SRS for the SIM for clutter echo detection. In some aspects, the increased beam sweeping for the SIM for clutter echo detection may be relative to normal self-interference measurements. For example, to detect the directionality of the clutter echo, the first wireless device may configure a higher repetition value to sweep more beams or narrower beams to detect the location of the clutter echo. In some aspects, one or more parameters for clutter echo detection include a direction range for clutter echo detection. The direction range may be indicated based on at least one beam direction within the angular range or the angular offset of the beam. In some aspects, the first wireless device may be a base station and the second wireless device may be a UE. In some aspects, the second wireless device is an IAB node and the first wireless device is a parent IAB node or a child node.

[0145] At 1204, the first wireless device may receive a report of one or more beams having the maximum self-interference RSRP due to clutter echoes. For example, 1204 may be performed by the self-interference component 1446 of the apparatus 1402. In some aspects, the report may indicate one or more beams having the maximum self-interference RSRP due to clutter echoes. The one or more beams may be indicated by the CSI-RS ID of each of the one or more beams.

[0146] Figure 13 FIG. 1300 is a flowchart of a method for wireless communication at a first wireless device. The method may be performed by an IAB node or a base station or a component of an IAB node or a base station (e.g., IAB nodes 103, 410, 420, 510, 520a, 520b; base stations 604, 604-1, 604-2; devices 310, 704, 804; base station 102, 180; apparatus 1402; baseband unit 1404, which may include a memory 376 and may be the entire device 310 or a component of device 310, such as TX processor 316, RX processor 370, and / or controller / processor 375). One or more of the illustrated operations may be optional, omitted, reordered, or performed simultaneously. The method may enable the first wireless device to detect clutter echoes.

[0147] At 1302, the first wireless device may receive information about clutter echoes. For example, 1302 may be performed by the clutter echo component 1440 of the apparatus 1402. The first wireless device may receive information about clutter echoes from a second wireless device. The first wireless device may receive information about clutter echoes from the second wireless device based on prior measurements. The prior measurements may indicate clutter echoes at an estimated location prior to transmission of a SIM configuration for clutter echo detection. In some aspects, the information may include a reception timing reported by the second wireless device to the first wireless device.

[0148] At 1304, the first wireless device may receive a request for configuration parameters. For example, 1304 may be performed by the request component 1442 of the apparatus 1402. The configuration parameters may include at least one of the following: increased transmit power, timing configuration, one or more beam directions, or an angular offset within an indicated direction range for clutter echo detection.

[0149] In 1306, a first wireless device may transmit a SIM configuration. For example, 1306 may be performed by a SIM configuration component 1444 of the equipped 1402. The first wireless device may transmit the SIM configuration to a second wireless device. The SIM configuration may have one or more parameters dedicated to clutter echo detection that are different from other types of SIMs. In some aspects, one or more parameters for clutter echo detection include increased transmit power. In some aspects, based on the increased transmit power, the increased transmit power may be used for one or more of the following: uplink sounding reference signal, uplink demodulation reference signal, physical uplink shared channel, or physical uplink control channel. In some aspects, one or more parameters for clutter echo detection include one or more timing parameters. The one or more timing parameters may include at least one of the following: adjusted transmission timing, guard period on a symbol adjacent to the symbol measuring the self-interference caused by measuring clutter echo, increased measurement window, or indication for the first wireless device to measure and report RTT information. In some aspects, the adjusted transmission timing may indicate an offset that can be applied to the timing alignment value transmitted by the first wireless device to help improve timing alignment. In some aspects, one or more parameters for clutter echo detection include additional resources for the SIM for clutter echo detection. The additional resources may include one or more of the following: increased beam sweeping for the SIM for clutter echo detection, first indication to use SSB for the SIM for clutter echo detection, second indication to use CSI-RS for the SIM for clutter echo detection, or third indication to use SRS for the SIM for clutter echo detection. In some aspects, the increased beam sweeping for the SIM for clutter echo detection may be relative to normal self-interference measurement. For example, to detect the directionality of clutter echo, the first wireless device may configure a higher repetition value to sweep more beams or narrower beams to detect the location of clutter echo. In some aspects, one or more parameters for clutter echo detection include a direction range for clutter echo detection. The direction range may be indicated based on at least one beam direction or angular offset of the beam within an angular range. In some aspects, the first wireless device may be a base station and the second wireless device may be a UE. In some aspects, the second wireless device is an IAB node and the first wireless device is a parent IAB node or a child node.

[0150] In 1308, the first wireless device may receive a report of one or more beams with the maximum self-interference RSRP due to clutter echo. For example, 1308 may be performed by a self-interference component 1446 of the equipped 1402. In some aspects, the report may indicate one or more beams with the maximum self-interference RSRP due to clutter echo. The one or more beams may be indicated by the CSI-RS ID of each of the one or more beams.

[0151] Figure 14 FIG. 1400 is a diagram illustrating an example of a hardware implementation of the apparatus 1402. The apparatus 1402 can be a base station, a component of a base station, or can implement base station functionality. In some aspects, the apparatus 1404 can include a baseband unit 1404. The baseband unit 1404 can communicate with the UE 104 via a cellular RF transceiver 1422. The baseband unit 1404 can include a computer-readable medium / memory. The baseband unit 1404 is responsible for general processing, including execution of software stored on the computer-readable medium / memory. The software, when executed by the baseband unit 1404, causes the baseband unit 1404 to perform the various functions described above. The computer-readable medium / memory can also be used to store data manipulated by the baseband unit 1404 when executing the software. The baseband unit 1404 further includes a receiving component 1430, a communication manager 1432, and a transmitting component 1434. The communication manager 1432 includes the one or more illustrated components. The components within the communication manager 1432 can be stored in the computer-readable medium / memory and / or configured as hardware within the baseband unit 1404. The baseband unit 1404 can be a component of the device 310 and can include a memory 376 and / or at least one of the following: a TX processor 316, an RX processor 370, and a controller / processor 375.

[0152] The communication manager 1432 includes a clutter echo component 1440 that can receive information about clutter echo from a second wireless device, e.g., as described in 1302 in connection with Figure 13 The communication manager 1432 further includes a request component 1442 that can receive a request for configuration parameters, e.g., as described in 1304 in connection with Figure 13 The communication manager 1432 further includes a SIM configuration component 1444 that can transmit SIM configuration, e.g., as described in 1202 in connection with Figure 12 or Figure 13 1306 described in. The communication manager 1432 further includes a self-interference component 1446 that can receive a report of one or more beams having the maximum self-interference RSRP due to clutter echo, e.g., as described in 1204 in connection with Figure 12 or Figure 13 1308 described in.

[0153] The apparatus can include additional components that perform each block of the algorithms in the Figure 12 or 13 flowcharts. Thus, Figure 12Each block in the flowchart of 13 or may be performed by a component, and the apparatus may include one or more of those components. These components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0154] As shown, apparatus 1402 may include various components configured for various functions. In one configuration, apparatus 1402, specifically cellular baseband processor 1404, includes means for transmitting to a second wireless device one or more parameters specific to clutter echo detection having a different SIM than other types of SIMs. The apparatus includes means for receiving a report of one or more beams having the maximum self-interference RSRP due to clutter echo. The apparatus further includes means for receiving information about clutter echo from the second wireless device based on prior measurements indicating clutter echo at the estimated location before transmitting the SIM configuration for clutter echo detection. The apparatus further includes means for receiving a request for at least one of: increased transmit power, timing configuration, one or more beam directions, or an angular offset within the indicated direction range for clutter echo detection. The means may be one or more of the components in apparatus 1402 configured to perform the functions recited by the means. As described above, apparatus 1402 may include TX processor 316, RX processor 370, and controller / processor 375. Thus, in one configuration, the means may be TX processor 316, RX processor 370, and controller / processor 375 configured to perform the functions recited by the means.

[0155] Figure 15 is a flowchart 1500 of a method for wireless communication at a first wireless device. The method may be performed by an IAB node or a UE or a component of an IAB node or a UE (e.g., IAB nodes 103, 410, 420, 510, 520a, 520b; UEs 104, 602, 602-1, 602-2; devices 350, 704, 804; cellular baseband processor 1704, which may include memory 360 and may be the entire device 350 or a component of device 350, such as TX processor 368, RX processor 356, and / or controller / processor 359). One or more of the illustrated operations may be optional, omitted, swapped, or performed simultaneously. The method may enable the first wireless device to detect clutter echo.

[0156] At 1502, a first wireless device may transmit an uplink transmission. For example, 1502 may be performed by the uplink component 1740 of the equipped 1702. The first wireless device may transmit an uplink transmission, where the uplink transmission may include SRS, uplink DMRS, PUSCH, or PUCCH. In some aspects, the first wireless device may include a UE. In some aspects, the first wireless device may include an IAB node or a sub-node.

[0157] At 1504, the first wireless device may determine to perform SIM. For example, 1504 may be performed by the detection component 1742 of the equipped 1702. The first wireless device may determine to perform SIM for clutter echo detection. In some aspects, the first wireless device may autonomously determine to perform SIM for clutter echo detection. The first wireless device may autonomously determine to perform SIM for clutter echo detection without an instruction from a second wireless device.

[0158] At 1506, the first wireless device may perform SIM for clutter echo detection. For example, 1506 may be performed by the SIM component 1752 of the equipped 1702. The first wireless device may perform SIM for clutter echo detection based on measurements of uplink SRS, uplink DMRS, PUSCH, or PUCCH. In some aspects, the first wireless device may perform SIM for clutter echo detection within a window received in a configuration from a second wireless device. In some aspects, the first wireless device may perform SIM for clutter echo detection in a half-duplex mode. In some aspects, the first wireless device may perform SIM for clutter echo detection in a full-duplex mode.

[0159] At 1508, the first wireless device may report one or more beams having the maximum self-interference RSRP due to clutter echo. For example, 1508 may be performed by the self-interference component 1756 from the equipped 1702. The first wireless device may report the one or more beams to the second wireless device. In some aspects, the first wireless device may report the one or more beams to the second wireless device in a reporting resource indicated by the second wireless device.

[0160] Figure 16Flowchart 1600 of a method for wireless communication at a first wireless device. The method may be performed by an IAB node or a UE or a component of an IAB node or a UE (e.g., IAB nodes 103, 410, 420, 510, 520a, 520b; UEs 104, 602, 602-1, 602-2; devices 350, 704, 804; cellular baseband processor 1704, which may include a memory 360 and may be the entire device 350 or a component of device 350, such as TX processor 368, RX processor 356, and / or controller / processor 359). One or more of the illustrated operations may be optional, omitted, swapped, or performed concurrently. The method may enable the first wireless device to detect clutter echoes.

[0161] At 1602, the first wireless device may transmit an uplink transmission. For example, 1602 may be performed by uplink component 1740 equipped with 1702. The first wireless device may transmit an uplink transmission, where the uplink transmission may include SRS, uplink DMRS, PUSCH, or PUCCH. In some aspects, the first wireless device may include a UE. In some aspects, the first wireless device may include an IAB node or a sub-node.

[0162] At 1604, the first wireless device may determine to perform SIM. For example, 1604 may be performed by detection component 1742 equipped with 1702. The first wireless device may determine to perform SIM for clutter echo detection. In some aspects, the first wireless device may autonomously determine to perform SIM for clutter echo detection. The first wireless device may autonomously determine to perform SIM for clutter echo detection without an instruction from a second wireless device.

[0163] At 1606, the first wireless device may request measurement resources. For example, 1606 may be performed by request component 1744 equipped with 1702. The first wireless device 802 may request measurement resources from a second wireless device. The first wireless device may request measurement resources for performing SIM.

[0164] At 1608, the first wireless device may receive a configuration of a window for clutter echo detection. For example, 1608 may be performed by window component 1746 equipped with 1702. The first wireless device may receive a configuration of a window for clutter echo detection from a second wireless device.

[0165] At 1610, the first wireless device may receive a configuration of half-duplex resources. For example, 1610 may be performed by duplex component 1748 equipped with 1702. The first wireless device may receive a configuration of half-duplex resources from a second wireless device. The first wireless device may perform SIM for clutter echo detection based on the half-duplex resources.

[0166] In 1612, the first wireless device may detect the occurrence of clutter echoes. For example, 1612 may be performed by the event component 1750 of the equipped 1702. In some aspects, the detection of the occurrence of clutter echoes may be based on the configuration for autonomous clutter echo detection of the first wireless device.

[0167] In 1614, the first wireless device may request a SIM training window. For example, 1614 may be performed by the request component 1744 of the equipped 1702. The first wireless device may request a SIM training window from the second wireless device. The first wireless device may request a SIM training window in response to detecting the occurrence of clutter echoes. The SIM training window may include periodic SRSs for beam sweeping for transmission.

[0168] In 1616, the first wireless device may receive the configuration of the SIM training window. For example, 1616 may be performed by the window component 1746 of the equipped 1702. The first wireless device may receive the configuration of the SIM training window from the second wireless device. The first wireless device may perform SIMs for clutter echo detection during the SIM training window.

[0169] In 1618, the first wireless device may perform SIMs for clutter echo detection. For example, 1618 may be performed by the SIM component 1752 of the equipped 1702. The first wireless device may perform SIMs for clutter echo detection based on measurements of uplink SRSs, uplink DMRSs, PUSCHs, or PUCCHs. In some aspects, the first wireless device may perform SIMs for clutter echo detection within the window received in the configuration from the second wireless device. In some aspects, the first wireless device may perform SIMs for clutter echo detection in a half-duplex mode. In some aspects, the first wireless device may perform SIMs for clutter echo detection in a full-duplex mode.

[0170] In 1620, the first wireless device may request reporting resources for clutter echo detection. For example, 1620 may be performed by the request component 1744 of the equipped 1702. The first wireless device may request reporting resources for clutter echo detection from the second wireless device. The first wireless device may request reporting resources for clutter echo detection to report autonomous clutter echo detection.

[0171] In 1622, the first wireless device may receive the configuration of the reporting resources. For example, 1622 may be performed by the resource component 1754 of the equipped 1702. The first wireless device may receive the configuration of the reporting resources from the second wireless device.

[0172] In 1624, the first wireless device may report one or more beams having the maximum self-interference RSRP due to clutter echoes. For example, 1624 may be performed by the self-interference component 1756 from the equipped 1702. The first wireless device may report the one or more beams to the second wireless device. In some aspects, the first wireless device may report the one or more beams to the second wireless device in the reporting resources indicated by the second wireless device.

[0173] Figure 17 FIG. 1700 is a diagram illustrating an example of a hardware implementation of the equipped 1702. The equipped 1702 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the equipped 1702 may include a cellular baseband processor 1704 (also referred to as a modem) coupled to a cellular RF transceiver 1722. In some aspects, the device 1702 may further include one or more subscriber identity module (SIM) cards 1720, an application processor 1706 coupled to a secure digital (SD) card 1708 and a screen 1710, a Bluetooth module 1712, a wireless local area network (WLAN) module 1714, a global positioning system (GPS) module 1716, or a power supply 1718. The cellular baseband processor 1704 communicates with the UE 104 and / or the BS 102 / 180 via the cellular RF transceiver 1722. The cellular baseband processor 1704 may include a computer-readable medium / memory. The computer-readable medium / memory may be non-transitory. The cellular baseband processor 1704 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the cellular baseband processor 1704, causes the cellular baseband processor 1704 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 1704 when executing the software. The cellular baseband processor 1704 further includes a receiving component 1730, a communication manager 1732, and a transmitting component 1734. The communication manager 1732 includes the one or more illustrated components. The components within the communication manager 1732 may be stored in the computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 1704. The cellular baseband processor 1704 may be a component of the device 350 and may include a memory 360 and / or at least one of the following: a TX processor 368, an RX processor 356, and a controller / processor 359. In one configuration, the equipped 1702 may be a modem chip and only include the baseband processor 1704, and in another configuration, the equipped 1702 may be an entire UE (e.g., see Figure 3 350) and include additional modules of the equipped 1702.

[0174] The communication manager 1732 includes an uplink component 1740 configured to transmit uplink SRS, uplink DMRS, PUSCH, or PUCCH, e.g., as described in 1502 of Figure 15 or 1602 of Figure 16 . The communication manager 1732 further includes a detection component 1742 configured to determine the SIM to perform clutter echo detection, e.g., as described in 1504 of Figure 15 or 1604 of Figure 16 . The communication manager 1732 further includes a request component 1744 configured to request measurement resources, e.g., as described in 1606 of Figure 16 Figure 16 . The communication manager 1732 further includes a window component 1746 configured to receive the configuration of the window, e.g., as described in 1608 of Figure 16 Figure 16 . The communication manager 1732 further includes a duplex component 1748 configured to receive the configuration of the half-duplex resources from a second wireless device, e.g., as described in 1610 of Figure 16 Figure 16 . The communication manager 1732 further includes an event component 1750 configured to detect the occurrence of clutter echo, e.g., as described in 1612 of Figure 16 Figure 16 . The communication manager 1732 further includes a request component 1744 configured to request the SIM training window, e.g., as described in 1614 of Figure 16 Figure 16 . The communication manager 1732 further includes a window component 1746 configured to receive the configuration of the SIM training window from a second wireless device, e.g., as described in 1616 of Figure 16 Figure 16 . The communication manager 1732 further includes a SIM component 1752 configured to perform the SIM for clutter echo detection based on the measurement of uplink SRS, uplink DMRS, PUSCH, or PUCCH, e.g., as described in 1506 of Figure 15 or 1618 of Figure 15 Figure 16 . The communication manager 1732 further includes a request component 1744 configured to request the reporting resources for clutter echo detection, e.g., as described in 1620 of Figure 16 Figure 16 . The communication manager 1732 further includes a resource component 1754 configured to receive the configuration of the reporting resources, e.g., as described in 1620 of Figure 16 Figure 16 Figure 16as described in 1622. The communication manager 1732 further includes a self-interference component 1756 configured to report one or more beams having the maximum self-interference RSRP due to clutter echoes, e.g., as described in conjunction with Figure 15 of 1508 or Figure 16 as described in 1624.

[0175] The device may include additional components that perform each block of the algorithms in the Figure 15 or 16 flowcharts. Thus, Figure 15 each block in the or 16 flowcharts may be performed by a component and the device may include one or more of those components. These components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0176] As shown in the figure, the apparatus 1702 may include various components configured for various functions. In one configuration, the apparatus 1702, specifically the cellular baseband processor 1704, includes means for transmitting uplink SRS, uplink DMRS, PUSCH, or PUCCH. The apparatus includes means for determining the SIM for which clutter echo detection is to be performed. The apparatus includes means for performing clutter echo detection on the SIM based on measurements of uplink SRS, uplink DMRS, PUSCH, or PUCCH. The apparatus includes means for reporting one or more beams having the maximum self-interference RSRP due to clutter echo. The apparatus further includes means for requesting measurement resources from a first wireless device. The apparatus further includes means for receiving a configuration of a window from a second wireless device. The apparatus further includes means for requesting reporting resources for clutter echo detection from a second wireless device. The apparatus further includes means for receiving a configuration of reporting resources from a second wireless device. The apparatus further includes means for receiving a configuration of half-duplex resources from a second wireless device, wherein the first wireless device uses the half-duplex resources to perform the SIM for clutter echo detection. The apparatus further includes means for detecting the occurrence of clutter echo. The apparatus further includes means for requesting a SIM training window in response to detecting the occurrence of clutter echo. The apparatus further includes means for receiving a configuration of a SIM training window from a second wireless device, wherein the first wireless device performs the SIM for clutter echo detection during the SIM training window. The means may be one or more of the components in the apparatus 1702 configured to perform the functions recited by the means. As described above, the apparatus 1702 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Thus, in one configuration, the means may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions recited by the means.

[0177] Figure 18 is a flowchart 1800 of a method of wireless communication of a first wireless device. The method may be performed by an IAB node or a base station or a component of an IAB node or a base station (e.g., IAB nodes 103, 410, 420, 510, 520a, 520b; base stations 102, 180, 604, 604-1, 604-2; devices 310, 704, 804; device 1902; baseband unit 1904, which may include a memory 376 and may be the entire device 310 or a component of the device 310, such as a TX processor 316, an RX processor 370, and / or a controller / processor 375). One or more of the illustrated operations may be optional, omitted, swapped, or performed simultaneously. The method may enable the first wireless device to detect clutter echo.

[0178] In 1802, a first wireless device may receive a request for measurement resources for a SIM for clutter echo detection. For example, 1802 may be performed by a request component 1940 of an equipped 1902. The first wireless device may receive a request for measurement resources for a SIM for clutter echo detection from a second wireless device. In some aspects, the measurement resources may include a SIM window. In some aspects, the measurement resources may include half-duplex resources. In some aspects, the first wireless device may include a base station and the second wireless device may include a UE. In some aspects, the second wireless device may include an IAB node and the first wireless device may include a parent IAB node.

[0179] In 1804, the first wireless device may transmit a configuration of the measurement resources. For example, 1804 may be performed by a configuration component 1942 of an equipped 1902. The first wireless device may transmit the configuration of the measurement resources to the second wireless device. The configuration of the measurement resources may configure the second wireless device to detect clutter echoes.

[0180] In 1806, the first wireless device may receive a report of one or more beams having a maximum self-interference RSRP due to clutter echoes. For example, 1806 may be performed by a report component 1944 of an equipped 1902. The first wireless device receives a report of one or more beams having a maximum self-interference RSRP due to clutter echoes from the second wireless device. In some aspects, the report may be received in a report resource indicated by the first wireless device. In some aspects, the request for the measurement resources may further request a report resource for clutter echo detection from the second wireless device. The configuration may further indicate the report resource to the second wireless device.

[0181] Figure 19FIG. 1900 is a diagram illustrating an example of a hardware implementation of apparatus 1902. Apparatus 1902 may be a base station, a component of a base station, or may implement base station functionality. In some aspects, apparatus 1902 may include a baseband unit 1904. The baseband unit 1904 may communicate with the UE 104 via a cellular RF transceiver 1922. The baseband unit 1904 may include a computer-readable medium / memory. The baseband unit 1904 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the baseband unit 1904, causes the baseband unit 1904 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the baseband unit 1904 when executing the software. The baseband unit 1904 further includes a receiving component 1930, a communication manager 1932, and a transmitting component 1934. The communication manager 1932 includes the one or more components illustrated. The components within the communication manager 1932 may be stored in the computer-readable medium / memory and / or configured as hardware within the baseband unit 1904. The baseband unit 1904 may be a component of device 310 and may include a memory 376 and / or at least one of the following: a TX processor 316, an RX processor 370, and a controller / processor 375.

[0182] The communication manager 1932 includes a request component 1940 that may receive a request for measurement resources for a SIM for clutter echo detection from a second wireless device, e.g., as described in conjunction with Figure 18 1802. The communication manager 1932 further includes a configuration component 1942 that may transmit a configuration of the measurement resources, e.g., as described in conjunction with Figure 18 1804. The communication manager 1932 further includes a reporting component 1944 that may receive a report of one or more beams having a maximum self-interference RSRP due to clutter echo, e.g., as described in conjunction with Figure 18 1806.

[0183] The apparatus may include additional components that execute each block of the algorithm in the Figure 18 flowchart. Thus, Figure 18 each block in the flowchart may be executed by a component and the apparatus may include one or more of those components. These components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0184] As shown in the figure, the apparatus 1902 may include various components configured for various functions. In one configuration, the apparatus 1902, specifically the baseband unit 1904, includes means for receiving a request from a second wireless device for measurement resources for a SIM for clutter echo detection. The apparatus includes means for transmitting the configuration of the measurement resources to the second wireless device. The apparatus includes means for receiving a report of one or more beams having the maximum self-interference RSRP due to clutter echoes. The means may be one or more of the components in the apparatus 1902 configured to perform the functions recited by the means. As described above, the apparatus 1902 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Thus, in one configuration, the means may be the TX processor 316, the RX processor 370, and the controller / processor 375 configured to perform the functions recited by the means.

[0185] It should be understood that the specific order or hierarchy of the various blocks in the disclosed process / flowchart is an illustration of exemplary approaches. It should be understood that based on design preferences, the specific order or hierarchy of the various blocks in these process / flowcharts may be rearranged. Additionally, some blocks may be combined or omitted. The appended method claims present the elements of the various blocks in an exemplary order and are not meant to be limited to the specific order or hierarchy presented.

[0186] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein but are to be accorded the full scope consistent with the language of the claims, where the recitation of a singular element is not intended to mean "one and only one" unless specifically stated otherwise, but rather "one or more." Terms such as "if," "when," and "while" are to be construed to mean "under the condition that," rather than implying a direct temporal relationship or reaction. That is, these phrases (e.g., "when") do not imply an immediate action in response to or during the occurrence of an action, but rather imply that the action will occur under the condition being met, without requiring a specific or immediate time constraint for the action to occur. The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as superior to or better than other aspects. Unless specifically stated otherwise, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "any combination of A, B, C, or the like" include any combination of A, B, and / or C, and may include multiple A's, multiple B's, or multiple C's. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "any combination of A, B, C, or the like" can be only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may include one or more members of A, B, or C. Elements of the various aspects described throughout this disclosure are expressly incorporated by reference and intended to be covered by the claims as all structural and functional equivalents known to those of ordinary skill in the art currently or hereafter. Additionally, nothing disclosed herein is intended to be dedicated to the public, whether or not such disclosure is expressly recited in the claims. The terms "module," "mechanism," "element," "device," etc. may not be used as a substitute for the term "apparatus." Thus, no claim element should be construed as a means-plus-function unless the element is expressly recited using the phrase "means for...".

[0187] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0188] Aspect 1 is an apparatus for wireless communication at a first wireless device, the apparatus including a memory and at least one processor coupled to the memory and configured to receive a SIM configuration having one or more parameters dedicated to clutter echo detection; perform a SIM for the clutter echo detection based on the SIM configuration; and report one or more beams having the maximum self-interference RSRP due to clutter echo.

[0189] Aspect 2 is the apparatus of Aspect 1, further including a transceiver coupled to the at least one processor.

[0190] Aspect 3 is the apparatus of Aspects 1 and 2, further including that the one or more parameters for the clutter echo detection include increased transmit power, and performing the SIM for the clutter echo detection includes transmitting one or more of the following based on the increased transmit power: uplink sounding reference signal, uplink demodulation reference signal, physical uplink shared channel, or physical uplink control channel.

[0191] Aspect 4 is the apparatus of Aspects 1-3, further including that the one or more parameters for the clutter echo detection include one or more timing parameters, where the one or more timing parameters include at least one of the following: adjusted transmission timing, guard period on a symbol adjacent to the symbol measuring the self-interference caused by clutter echo, increased measurement window, or indication to measure and report RTT information for the first wireless device.

[0192] Aspect 5 is the apparatus of Aspects 1-4, further including that the one or more parameters for the clutter echo detection include additional resources for the SIM for the clutter echo detection, where the additional resources include one or more of the following: increased beam sweeping for the SIM for the clutter echo detection, first indication to use SSB for the SIM for the clutter echo detection, second indication to use CSI-RS for the SIM for the clutter echo detection, or third indication to use SRS for the SIM for the clutter echo detection.

[0193] Aspect 6 is the apparatus of Aspects 1-5, further including that the at least one processor is further configured to report information about clutter echo in the estimated location to a second wireless device based on prior measurements before receiving the SIM configuration having the one or more parameters for the clutter echo detection, where the information includes the reception timing reported by the first wireless device to the second wireless device.

[0194] Aspect 7 is the apparatus of Aspects 1 - 6, further comprising that the at least one processor is further configured to request at least one of the following: increased transmit power, timing configuration, one or more beam directions, or an angular offset within the indicated direction range for the clutter echo detection.

[0195] Aspect 8 is the apparatus of Aspects 1 - 7, further comprising that the first wireless device performs the SIM for the clutter echo detection in full - duplex mode.

[0196] Aspect 9 is the apparatus of Aspects 1 - 8, further comprising that the at least one processor is further configured to receive a configuration of half - duplex resources from a second wireless device, wherein the first wireless device uses the half - duplex resources to perform the SIM for the clutter echo detection; detect the occurrence of a clutter echo; request a SIM training window in response to detecting the occurrence of the clutter echo; and receive a configuration of the SIM training window from the second wireless device, wherein the first wireless device performs the SIM for the clutter echo detection during the SIM training window.

[0197] Aspect 10 is a wireless communication method for implementing any one of Aspects 1 - 9.

[0198] Aspect 11 is a device for wireless communication, comprising means for implementing any one of Aspects 1 - 9.

[0199] Aspect 12 is a computer - readable medium storing computer - executable code, wherein the code, when executed by a processor, causes the processor to implement any one of Aspects 1 - 9.

[0200] Aspect 13 is a device for wireless communication at a first wireless device, the device comprising a memory and at least one processor, the at least one processor coupled to the memory and configured to transmit to a second wireless device a SIM configuration having one or more parameters dedicated to clutter echo detection; and receive a report of one or more beams having the maximum self - interference RSRP due to clutter echoes.

[0201] Aspect 14 is the apparatus of Aspect 13, further comprising a transceiver coupled to the at least one processor.

[0202] Aspect 15 is the apparatus of Aspects 13 and 14, further comprising that the one or more parameters for the clutter echo detection include increased transmit power, wherein based on the increased transmit power, the increased transmit power is used for one or more of the following: uplink sounding reference signal, uplink demodulation reference signal, physical uplink shared channel, or physical uplink control channel.

[0203] Aspect 16 is the apparatus of Aspects 13 - 15, further comprising that one or more parameters for the clutter echo detection include one or more timing parameters, where the one or more timing parameters include at least one of the following: adjusted transmission timing, guard periods on symbols adjacent to the symbol for measuring the self-interference caused by the clutter echo, increased measurement window, or indication to measure and report RTT information for the first wireless device.

[0204] Aspect 17 is the apparatus of Aspects 13 - 16, further comprising that one or more parameters for the clutter echo detection include additional resources for the SIM for the clutter echo detection, where the additional resources include one or more of the following: increased beam sweeping for the SIM for the clutter echo detection, first indication to use SSB for the SIM for the clutter echo detection, second indication to use CSI-RS for the SIM for the clutter echo detection, or third indication to use SRS for the SIM for the clutter echo detection.

[0205] Aspect 18 is the apparatus of Aspects 13 - 17, further comprising that the at least one processor is further configured to receive information on the estimated location of the clutter echo from the second wireless device before transmitting the SIM configuration for the clutter echo detection, where the information includes the reception timing reported by the second wireless device to the first wireless device; and receive a request for at least one of the following: increased transmit power, timing configuration, one or more beam directions, or angular offset within the indicated direction range for the clutter echo detection.

[0206] Aspect 19 is the apparatus of Aspects 13 - 18, further comprising that the report indicates the one or more beams having the maximum self-interference RSRP due to the clutter echo, where the one or more beams are indicated by the CSI-RS ID of each of the one or more beams.

[0207] Aspect 20 is a wireless communication method for implementing any one of Aspects 13 - 19.

[0208] Aspect 21 is a device for wireless communication, comprising means for implementing any one of Aspects 13 - 19.

[0209] Aspect 22 is a computer-readable medium storing computer-executable code, where the code, when executed by a processor, causes the processor to implement any one of Aspects 13 - 19.

[0210] Aspect 23 is an apparatus for wireless communication at a first wireless device, the apparatus including a memory and at least one processor, the at least one processor coupled to the memory and configured to transmit an uplink SRS, uplink DMRS, PUSCH, or PUCCH; determine a SIM to be performed for clutter echo detection; perform the SIM for the clutter echo detection based on measurements of the uplink SRS, uplink DMRS, PUSCH, or PUCCH; and report one or more beams having a maximum self-interference RSRP due to clutter echo.

[0211] Aspect 24 is the apparatus of aspect 23, further including a transceiver coupled to the at least one processor.

[0212] Aspect 25 is the apparatus of aspects 23 and 24, further including the first wireless device autonomously determining to perform the SIM for the clutter echo detection without an instruction from a second wireless device.

[0213] Aspect 26 is the apparatus of aspects 23 - 25, further including the first wireless device performing the SIM for the clutter echo detection within a window received in a configuration from a second wireless device, wherein the at least one processor is further configured to request measurement resources for the first wireless device; and receive a configuration of the window from the second wireless device.

[0214] Aspect 27 is the apparatus of aspects 23 - 26, further including the first wireless device reporting the one or more beams to the second wireless device in a reporting resource indicated by the second wireless device, wherein the at least one processor is further configured to request the reporting resource for the clutter echo detection from the second wireless device; and receive a configuration of the reporting resource from the second wireless device.

[0215] Aspect 28 is the apparatus of aspects 23 - 27, further including the first wireless device performing the SIM for the clutter echo detection in a full-duplex mode.

[0216] Aspect 29 is the apparatus of aspects 23 - 28, further including the first wireless device performing the SIM for the clutter echo detection in a full-duplex mode.

[0217] Aspect 30 is the apparatus of aspects 23 - 29, further including the at least one processor being further configured to receive a configuration of half-duplex resources from a second wireless device, wherein the first wireless device uses the half-duplex resources to perform the SIM for the clutter echo detection.

[0218] Aspect 31 is the apparatus of Aspects 23 - 30, further comprising that the at least one processor is further configured to detect the occurrence of clutter echoes; request a SIM training window in response to detecting the occurrence of the clutter echoes; and receive a configuration of the SIM training window from a second wireless device, wherein the first wireless device performs the SIM for the clutter echo detection during the SIM training window.

[0219] Aspect 32 is a wireless communication method for implementing any one of Aspects 23 - 31.

[0220] Aspect 33 is a device for wireless communication, comprising means for implementing any one of Aspects 23 - 31.

[0221] Aspect 34 is a computer-readable medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of Aspects 23 - 31.

[0222] Aspect 35 is an apparatus for wireless communication at a first wireless device, the apparatus comprising a memory and at least one processor, the at least one processor being coupled to the memory and configured to receive a request for measurement resources for a SIM for clutter echo detection from a second wireless device; transmit a configuration of the measurement resources to the second wireless device; and receive a report of one or more beams having a maximum self-interference RSRP due to the clutter echoes.

[0223] Aspect 36 is the apparatus of Aspect 35, further comprising a transceiver coupled to the at least one processor.

[0224] Aspect 37 is the apparatus of Aspects 35 and 36, further comprising that the measurement resources include a SIM window.

[0225] Aspect 38 is the apparatus of Aspects 35 - 37, further comprising that the measurement resources include half-duplex resources.

[0226] Aspect 39 is the apparatus of Aspects 35 - 38, further comprising that the report is received in a report resource indicated by the first wireless device, wherein the request further requests the report resource for the clutter echo detection from the second wireless device, and wherein the configuration further indicates the report resource to the second wireless device.

[0227] Aspect 40 is a wireless communication method for implementing any one of Aspects 35 - 39.

[0228] Aspect 41 is a device for wireless communication, comprising means for implementing any one of Aspects 35 - 39.

[0229] Aspect 42 is a computer-readable medium storing computer-executable code that, when executed by a processor, causes the processor to implement any one of aspects 35-39.

Claims

1. An apparatus for wireless communication at a first wireless device, comprising: a memory; and at least one processor coupled to the memory and configured to: report information about clutter echoes in an estimated location to a second wireless device; receive a self-interference measurement (SIM) configuration having one or more parameters dedicated to clutter echo detection; perform a SIM for the clutter echo detection based on the SIM configuration; and report one or more beams having the maximum self-interference reference signal received power (RSRP) due to clutter echoes, wherein the reported information about clutter echoes in the estimated location is based on prior measurements before receiving the SIM configuration having the one or more parameters for the clutter echo detection, and wherein the information includes the reception timing reported by the first wireless device to the second wireless device.

2. The apparatus of claim 1, further comprising a transceiver coupled to the at least one processor.

3. The apparatus of claim 1, wherein the one or more parameters for the clutter echo detection include an increased transmit power, and wherein performing the SIM for the clutter echo detection includes transmitting one or more of the following based on the increased transmit power: uplink sounding reference signal, uplink demodulation reference signal, physical uplink shared channel, or physical uplink control channel.

4. The apparatus of claim 1, wherein the one or more parameters for the clutter echo detection include one or more timing parameters, and wherein the one or more timing parameters include at least one of the following: adjusted transmission timing, a guard period on a symbol adjacent to the symbol measuring self-interference caused by measuring clutter echoes, an increased measurement window, or an indication for the first wireless device to measure and report round-trip timing (RTT) information.

5. The apparatus of claim 1, wherein the one or more parameters for the clutter echo detection include additional resources for the SIM for the clutter echo detection, and wherein the additional resources include one or more of the following: increased beam sweeping for the SIM for the clutter echo detection, a first indication to use a synchronization signal block (SSB) for the SIM for the clutter echo detection, a second indication to use a channel state information reference signal (CSI-RS) for the SIM for the clutter echo detection, or a third indication to use a sounding reference signal (SRS) for the SIM for the clutter echo detection.

6. The apparatus of claim 1, wherein the at least one processor is further configured to: request at least one of the following: increased transmit power, timing configuration, one or more beam directions, or an angular offset within an indicated direction range for the clutter echo detection.

7. The apparatus of claim 1, wherein the first wireless device performs the SIM for the clutter echo detection in full-duplex mode.

8. The apparatus according to claim 7, wherein the at least one processor is further configured to: receive a configuration of half-duplex resources from a second wireless device, wherein the first wireless device uses the half-duplex resources to perform the SIM for the clutter echo detection; detect the occurrence of a clutter echo; request a SIM training window in response to detecting the occurrence of the clutter echo; and receive a configuration of the SIM training window from the second wireless device, wherein the first wireless device performs the SIM for the clutter echo detection during the SIM training window.

9. An apparatus for wireless communication at a first wireless device, comprising: a memory; and at least one processor coupled to the memory and configured to: receive information about an estimated location of a clutter echo from a second wireless device; transmit a self-interference measurement (SIM) configuration having one or more parameters dedicated to clutter echo detection to the second wireless device; and receive a report of one or more beams having the maximum self-interference reference signal received power (RSRP) due to the clutter echo, wherein the at least one processor is further configured to: receive the information about the estimated location of the clutter echo before transmitting the SIM configuration for the clutter echo detection, wherein the information includes a reception timing reported by the second wireless device to the first wireless device.

10. The apparatus according to claim 9, further comprising a transceiver coupled to the at least one processor.

11. The apparatus according to claim 9, wherein the one or more parameters for the clutter echo detection include an increased transmit power, wherein the increased transmit power is used to transmit one or more of the following: uplink sounding reference signal, uplink demodulation reference signal, physical uplink shared channel, or physical uplink control channel.

12. The apparatus according to claim 9, wherein the one or more parameters for the clutter echo detection include one or more timing parameters, wherein the one or more timing parameters include at least one of the following: adjusted transmission timing, a guard period on a symbol adjacent to the symbol measuring the self-interference caused by the clutter echo, an increased measurement window, or an indication for the first wireless device to measure and report round-trip timing (RTT) information.

13. The apparatus according to claim 9, wherein the one or more parameters for the clutter echo detection include additional resources for the SIM for the clutter echo detection, wherein the additional resources include one or more of the following: increased beam sweeping for the SIM for the clutter echo detection, a first indication to use a synchronization signal block (SSB) for the SIM for the clutter echo detection, a second indication to use a channel state information reference signal (CSI-RS) for the SIM for the clutter echo detection, or A third indication for using sounding reference signals (SRS) for the clutter echo detection of the SIM.

14. The apparatus according to claim 9, wherein the at least one processor is further configured to: Receive a request for at least one of the following: increased transmit power, timing configuration, one or more beam directions, or an angular offset within the indicated direction range for the clutter echo detection.

15. The apparatus according to claim 9, wherein the report indicates the one or more beams having the maximum self-interference RSRP due to clutter echoes, and wherein the one or more beams are indicated by the channel state information reference signal (CSI-RS) identifier (ID) of each of the one or more beams.

16. An apparatus for wireless communication at a first wireless device, comprising: A memory; And At least one processor coupled to the memory and configured to: Transmit an uplink sounding reference signal (SRS), an uplink demodulation reference signal (DMRS), a physical uplink shared channel (PUSCH), or a physical uplink control channel (PUCCH); Determine to perform a self-interference measurement (SIM) for clutter echo detection; Detect the occurrence of clutter echoes; Request a SIM training window in response to detecting the occurrence of the clutter echoes; Receive a configuration of the SIM training window from a second wireless device, wherein the first wireless device performs the SIM for the clutter echo detection during the SIM training window; Perform the SIM for the clutter echo detection based on measurements of the uplink SRS, the uplink DMRS, the PUSCH, or the PUCCH; And Report one or more beams having the maximum self-interference reference signal received power (RSRP) due to clutter echoes.

17. The apparatus according to claim 16, further comprising a transceiver coupled to the at least one processor.

18. The apparatus according to claim 16, wherein the first wireless device autonomously determines to perform the SIM for the clutter echo detection without an instruction from the second wireless device.

19. The apparatus according to claim 16, wherein the first wireless device performs the SIM for the clutter echo detection within a window received in a configuration from the second wireless device, and wherein the at least one processor is further configured to: Request measurement resources for the first wireless device; and Receive a configuration of the window from the second wireless device.

20. The apparatus according to claim 16, wherein the first wireless device reports the one or more beams to the second wireless device in a reporting resource indicated by the second wireless device, and wherein the at least one processor is further configured to: Request the reporting resource for the clutter echo detection from the second wireless device; and Receive a configuration of the reporting resource from the second wireless device.

21. The apparatus according to claim 16, wherein the first wireless device performs the SIM for the clutter echo detection in a half-duplex mode.

22. The apparatus according to claim 16, wherein the first wireless device performs the SIM for the clutter echo detection in a full-duplex mode.

23. The apparatus according to claim 22, wherein the at least one processor is further configured to: receive a configuration of half-duplex resources from a second wireless device, wherein the first wireless device uses the half-duplex resources to perform the SIM for the clutter echo detection.

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