Signaling to support reflection and sensing by hybrid reconfigurable intelligent surfaces
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- QUALCOMM INC
- Filing Date
- 2023-08-09
- Publication Date
- 2026-06-17
AI Technical Summary
Existing wireless communication systems face challenges in efficiently supporting reflection and sensing functions by hybrid reconfigurable intelligent surfaces (H-RIS), particularly in reducing reporting overhead and improving spectrum utilization.
The method involves a base station transmitting a reference signal configuration and a sensing report configuration to an H-RIS, allowing the H-RIS to report sensing success or failure, and configuring the H-RIS to use previously determined direction of arrival (DoA) values for reflection coefficients, while also enabling simultaneous sensing and reflection using common radio resources.
This approach reduces reporting overhead, allows flexible generation of reflection coefficients, and improves spectrum utilization by enabling simultaneous sensing and reflection, thereby enhancing the efficiency of H-RIS in wireless communication systems.
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Figure CN2023111891_13022025_PF_FP_ABST
Abstract
Description
SIGNALING TO SUPPORT REFLECTION AND SENSING BY HYBRID RECONFIGURABLE INTELLIGENT SURFACES
[0001] BACKGROUND OF THE DISCLOSURE
[0002] 1. Field of the Disclosure
[0003] Aspects of the disclosure relate generally to wireless technologies.
[0004] 2. Description of the Related Art
[0005] Wireless communication systems have developed through various generations, including a first-generation analog wireless phone service (1G) , a second-generation (2G) digital wireless phone service (including interim 2.5G and 2.75G networks) , a third-generation (3G) high speed data, Internet-capable wireless service and a fourth-generation (4G) service (e.g., Long Term Evolution (LTE) or WiMax) . There are presently many different types of wireless communication systems in use, including cellular and personal communications service (PCS) systems. Examples of known cellular systems include the cellular analog advanced mobile phone system (AMPS) , and digital cellular systems based on code division multiple access (CDMA) , frequency division multiple access (FDMA) , time division multiple access (TDMA) , the Global System for Mobile communications (GSM) , etc.
[0006] A fifth generation (5G) wireless standard, referred to as New Radio (NR) , enables higher data transfer speeds, greater numbers of connections, and better coverage, among other improvements. The 5G standard, according to the Next Generation Mobile Networks Alliance, is designed to provide higher data rates as compared to previous standards, more accurate positioning (e.g., based on reference signals for positioning (RS-P) , such as downlink, uplink, or sidelink positioning reference signals (PRS) ) , and other technical enhancements. These enhancements, as well as the use of higher frequency bands, advances in PRS processes and technology, and high-density deployments for 5G, enable highly accurate 5G-based positioning.SUMMARY
[0007] The following presents a simplified summary relating to one or more aspects disclosed herein. Thus, the following summary should not be considered an extensive overview relating to all contemplated aspects, nor should the following summary be considered to identify key or critical elements relating to all contemplated aspects or to delineate the scope associated with any particular aspect. Accordingly, the following summary has the sole purpose to present certain concepts relating to one or more aspects relating to the mechanisms disclosed herein in a simplified form to precede the detailed description presented below.
[0008] In an aspect, a method of wireless communication performed by a network node includes transmitting, to a hybrid reconfigurable intelligent surface (H-RIS) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; transmitting, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and receiving, from the H-RIS, a sensing result report indicating the type of the sensing result.
[0009] In an aspect, a method of wireless communication performed by a hybrid reconfigurable intelligent surface (H-RIS) includes receiving, from a network node, a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; receiving, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and transmitting, to the network node, a sensing result report indicating the type of the sensing result.
[0010] In an aspect, a network node includes one or more memories; one or more transceivers; and one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to: transmit, via the one or more transceivers, to a hybrid reconfigurable intelligent surface (H-RIS) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; transmit, via the one or more transceivers, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and receive, via the one or more transceivers, from the H-RIS, a sensing result report indicating the type of the sensing result.
[0011] In an aspect, a hybrid reconfigurable intelligent surface (H-RIS) includes one or more memories; one or more transceivers; and one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to: receive, via the one or more transceivers, from a network node, a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; receive, via the one or more transceivers, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and transmit, via the one or more transceivers, to the network node, a sensing result report indicating the type of the sensing result.
[0012] In an aspect, a network node includes means for transmitting, to a hybrid reconfigurable intelligent surface (H-RIS) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; means for transmitting, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and means for receiving, from the H-RIS, a sensing result report indicating the type of the sensing result.
[0013] In an aspect, a hybrid reconfigurable intelligent surface (H-RIS) includes means for receiving, from a network node, a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; means for receiving, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and means for transmitting, to the network node, a sensing result report indicating the type of the sensing result.
[0014] In an aspect, a non-transitory computer-readable medium stores computer-executable instructions that, when executed by a network node, cause the network node to: transmit, to a hybrid reconfigurable intelligent surface (H-RIS) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; transmit, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and receive, from the H-RIS, a sensing result report indicating the type of the sensing result.
[0015] In an aspect, a non-transitory computer-readable medium stores computer-executable instructions that, when executed by a hybrid reconfigurable intelligent surface (H-RIS) , cause the H-RIS to: receive, from a network node, a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; receive, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and transmit, to the network node, a sensing result report indicating the type of the sensing result.
[0016] Other objects and advantages associated with the aspects disclosed herein will be apparent to those skilled in the art based on the accompanying drawings and detailed description.BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are presented to aid in the description of various aspects of the disclosure and are provided solely for illustration of the aspects and not limitation thereof.
[0018] FIG. 1 illustrates an example wireless communications system, according to aspects of the disclosure.
[0019] FIGS. 2A, 2B, and 2C illustrate example wireless network structures, according to aspects of the disclosure.
[0020] FIGS. 3A, 3B, and 3C are simplified block diagrams of several sample aspects of components that may be employed in a user equipment (UE) , a base station, and a network entity, respectively, and configured to support communications as taught herein.
[0021] FIG. 4 illustrates an example system for wireless communication using a reconfigurable intelligent surface (RIS) , according to aspects of the disclosure.
[0022] FIG. 5 is a diagram of an example architecture of a RIS, according to aspects of the disclosure.
[0023] FIG. 6 illustrates examples of reflective beamforming by a RIS, according to aspects of the disclosure.
[0024] FIG. 7 is a diagram illustrating an example scenario involving a hybrid RIS (H-RIS) , according to aspects of the disclosure.
[0025] FIG. 8 illustrates different hardware structures for H-RIS, according to aspects of the disclosure.
[0026] FIG. 9 is a diagram illustrating an example signaling flow for the first and second techniques described herein, according to aspects of the disclosure.
[0027] FIG. 10 illustrates an example scenario in which a base station configures the identifiers of multiple previous sensing signal resources and their associated direction flags, according to aspects of the disclosure.
[0028] FIG. 11 is a diagram illustrating different scopes of the sensing directions, according to aspects of the disclosure.
[0029] FIG. 12 is a diagram illustrating different types of interference at an H-RIS, according to aspects of the disclosure.
[0030] FIGS. 13 and 14 illustrate example methods of wireless communication, according to aspects of the disclosure.DETAILED DESCRIPTION
[0031] Aspects of the disclosure are provided in the following description and related drawings directed to various examples provided for illustration purposes. Alternate aspects may be devised without departing from the scope of the disclosure. Additionally, well-known elements of the disclosure will not be described in detail or will be omitted so as not to obscure the relevant details of the disclosure.
[0032] Various aspects relate generally to hybrid reconfigurable intelligent surfaces (H-RIS) . Some aspects more specifically relate to signaling to support H-RIS reflection and sensing functions. In some examples, a base station sends a sensing report configuration to an H-RIS in response to receipt of a capability report from the H-RIS. In some examples, the H-RIS further sends a sensing report according to the sensing report configuration to the base station. In some examples, the sensing report configuration includes at least one of a direction flag for each sensing signal resource and an exclusion flag.
[0033] Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. In some examples, by configuring the H-RIS with at least one of a direction flag for each sensing signal resource and an exclusion flag, the described techniques can be used to reduce reporting overhead.
[0034] The words “exemplary” and / or “example” are used herein to mean “serving as an example, instance, or illustration. ” Any aspect described herein as “exemplary” and / or “example” is not necessarily to be construed as preferred or advantageous over other aspects. Likewise, the term “aspects of the disclosure” does not require that all aspects of the disclosure include the discussed feature, advantage or mode of operation.
[0035] Those of skill in the art will appreciate that the information and signals described below may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description below may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof, depending in part on the particular application, in part on the desired design, in part on the corresponding technology, etc.
[0036] Further, many aspects are described in terms of sequences of actions to be performed by, for example, elements of a computing device. It will be recognized that various actions described herein can be performed by specific circuits (e.g., application specific integrated circuits (ASICs) ) , by program instructions being executed by one or more processors, or by a combination of both. Additionally, the sequence (s) of actions described herein can be considered to be embodied entirely within any form of non-transitory computer-readable storage medium having stored therein a corresponding set of computer instructions that, upon execution, would cause or instruct an associated processor of a device to perform the functionality described herein. Thus, the various aspects of the disclosure may be embodied in a number of different forms, all of which have been contemplated to be within the scope of the claimed subject matter. In addition, for each of the aspects described herein, the corresponding form of any such aspects may be described herein as, for example, “logic configured to” perform the described action.
[0037] As used herein, the terms “user equipment” (UE) and “base station” are not intended to be specific or otherwise limited to any particular radio access technology (RAT) , unless otherwise noted. In general, a UE may be any wireless communication device (e.g., a mobile phone, router, tablet computer, laptop computer, consumer asset locating device, wearable (e.g., smartwatch, glasses, augmented reality (AR) / virtual reality (VR) headset, etc. ) , vehicle (e.g., automobile, motorcycle, bicycle, etc. ) , Internet of Things (IoT) device, etc. ) used by a user to communicate over a wireless communications network. A UE may be mobile or may (e.g., at certain times) be stationary, and may communicate with a radio access network (RAN) . As used herein, the term “UE” may be referred to interchangeably as an “access terminal” or “AT, ” a “client device, ” a “wireless device, ” a “subscriber device, ” a “subscriber terminal, ” a “subscriber station, ” a “user terminal” or “UT, ” a “mobile device, ” a “mobile terminal, ” a “mobile station, ” or variations thereof. Generally, UEs can communicate with a core network via a RAN, and through the core network the UEs can be connected with external networks such as the Internet and with other UEs. Of course, other mechanisms of connecting to the core network and / or the Internet are also possible for the UEs, such as over wired access networks, wireless local area network (WLAN) networks (e.g., based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 specification, etc. ) and so on.
[0038] A base station may operate according to one of several RATs in communication with UEs depending on the network in which it is deployed, and may be alternatively referred to as an access point (AP) , a network node, a NodeB, an evolved NodeB (eNB) , a next generation eNB (ng-eNB) , a New Radio (NR) Node B (also referred to as a gNB or gNodeB) , etc. A base station may be used primarily to support wireless access by UEs, including supporting data, voice, and / or signaling connections for the supported UEs. In some systems a base station may provide purely edge node signaling functions while in other systems it may provide additional control and / or network management functions. A communication link through which UEs can send signals to a base station is called an uplink (UL) channel (e.g., a reverse traffic channel, a reverse control channel, an access channel, etc. ) . A communication link through which the base station can send signals to UEs is called a downlink (DL) or forward link channel (e.g., a paging channel, a control channel, a broadcast channel, a forward traffic channel, etc. ) . As used herein the term traffic channel (TCH) can refer to either an uplink / reverse or downlink / forward traffic channel.
[0039] The term “base station” may refer to a single physical transmission-reception point (TRP) or to multiple physical TRPs that may or may not be co-located. For example, where the term “base station” refers to a single physical TRP, the physical TRP may be an antenna of the base station corresponding to a cell (or several cell sectors) of the base station. Where the term “base station” refers to multiple co-located physical TRPs, the physical TRPs may be an array of antennas (e.g., as in a multiple-input multiple-output (MIMO) system or where the base station employs beamforming) of the base station. Where the term “base station” refers to multiple non-co-located physical TRPs, the physical TRPs may be a distributed antenna system (DAS) (a network of spatially separated antennas connected to a common source via a transport medium) or a remote radio head (RRH) (aremote base station connected to a serving base station) . Alternatively, the non-co-located physical TRPs may be the serving base station receiving the measurement report from the UE and a neighbor base station whose reference radio frequency (RF) signals the UE is measuring. Because a TRP is the point from which a base station transmits and receives wireless signals, as used herein, references to transmission from or reception at a base station are to be understood as referring to a particular TRP of the base station.
[0040] In some implementations that support positioning of UEs, a base station may not support wireless access by UEs (e.g., may not support data, voice, and / or signaling connections for UEs) , but may instead transmit reference signals to UEs to be measured by the UEs, and / or may receive and measure signals transmitted by the UEs. Such a base station may be referred to as a positioning beacon (e.g., when transmitting signals to UEs) and / or as a location measurement unit (e.g., when receiving and measuring signals from UEs) .
[0041] An “RF signal” comprises an electromagnetic wave of a given frequency that transports information through the space between a transmitter and a receiver. As used herein, a transmitter may transmit a single “RF signal” or multiple “RF signals” to a receiver. However, the receiver may receive multiple “RF signals” corresponding to each transmitted RF signal due to the propagation characteristics of RF signals through multipath channels. The same transmitted RF signal on different paths between the transmitter and receiver may be referred to as a “multipath” RF signal. As used herein, an RF signal may also be referred to as a “wireless signal” or simply a “signal” where it is clear from the context that the term “signal” refers to a wireless signal or an RF signal.
[0042] FIG. 1 illustrates an example wireless communications system 100, according to aspects of the disclosure. The wireless communications system 100 (which may also be referred to as a wireless wide area network (WWAN) ) may include various base stations 102 (labeled “BS” ) and various UEs 104. The base stations 102 may include macro cell base stations (high power cellular base stations) and / or small cell base stations (low power cellular base stations) . In an aspect, the macro cell base stations may include eNBs and / or ng-eNBs where the wireless communications system 100 corresponds to an LTE network, or gNBs where the wireless communications system 100 corresponds to a NR network, or a combination of both, and the small cell base stations may include femtocells, picocells, microcells, etc.
[0043] The base stations 102 may collectively form a RAN and interface with a core network 170 (e.g., an evolved packet core (EPC) or a 5G core (5GC) ) through backhaul links 122, and through the core network 170 to one or more location servers 172 (e.g., a location management function (LMF) or a secure user plane location (SUPL) location platform (SLP) ) . The location server (s) 172 may be part of core network 170 or may be external to core network 170. A location server 172 may be integrated with a base station 102. A UE 104 may communicate with a location server 172 directly or indirectly. For example, a UE 104 may communicate with a location server 172 via the base station 102 that is currently serving that UE 104. A UE 104 may also communicate with a location server 172 through another path, such as via an application server (not shown) , via another network, such as via a wireless local area network (WLAN) access point (AP) (e.g., AP 150 described below) , and so on. For signaling purposes, communication between a UE 104 and a location server 172 may be represented as an indirect connection (e.g., through the core network 170, etc. ) or a direct connection (e.g., as shown via direct connection 128) , with the intervening nodes (if any) omitted from a signaling diagram for clarity.
[0044] In addition to other functions, the base stations 102 may perform functions that relate to one or more of transferring user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity) , inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, RAN sharing, multimedia broadcast multicast service (MBMS) , subscriber and equipment trace, RAN information management (RIM) , paging, positioning, and delivery of warning messages. The base stations 102 may communicate with each other directly or indirectly (e.g., through the EPC / 5GC) over backhaul links 134, which may be wired or wireless.
[0045] The base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. In an aspect, one or more cells may be supported by a base station 102 in each geographic coverage area 110. A “cell” is a logical communication entity used for communication with a base station (e.g., over some frequency resource, referred to as a carrier frequency, component carrier, carrier, band, or the like) , and may be associated with an identifier (e.g., a physical cell identifier (PCI) , an enhanced cell identifier (ECI) , a virtual cell identifier (VCI) , a cell global identifier (CGI) , etc. ) for distinguishing cells operating via the same or a different carrier frequency. In some cases, different cells may be configured according to different protocol types (e.g., machine-type communication (MTC) , narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) , or others) that may provide access for different types of UEs. Because a cell is supported by a specific base station, the term “cell” may refer to either or both of the logical communication entity and the base station that supports it, depending on the context. In addition, because a TRP is typically the physical transmission point of a cell, the terms “cell” and “TRP” may be used interchangeably. In some cases, the term “cell” may also refer to a geographic coverage area of a base station (e.g., a sector) , insofar as a carrier frequency can be detected and used for communication within some portion of geographic coverage areas 110.
[0046] While neighboring macro cell base station 102 geographic coverage areas 110 may partially overlap (e.g., in a handover region) , some of the geographic coverage areas 110 may be substantially overlapped by a larger geographic coverage area 110. For example, a small cell base station 102' (labeled “SC” for “small cell” ) may have a geographic coverage area 110' that substantially overlaps with the geographic coverage area 110 of one or more macro cell base stations 102. A network that includes both small cell and macro cell base stations may be known as a heterogeneous network. A heterogeneous network may also include home eNBs (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) .
[0047] The communication links 120 between the base stations 102 and the UEs 104 may include uplink (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and / or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104. The communication links 120 may use MIMO antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication links 120 may be through one or more carrier frequencies. Allocation of carriers may be asymmetric with respect to downlink and uplink (e.g., more or less carriers may be allocated for downlink than for uplink) .
[0048] The wireless communications system 100 may further include a wireless local area network (WLAN) access point (AP) 150 in communication with WLAN stations (STAs) 152 via communication links 154 in an unlicensed frequency spectrum (e.g., 5 GHz) . When communicating in an unlicensed frequency spectrum, the WLAN STAs 152 and / or the WLAN AP 150 may perform a clear channel assessment (CCA) or listen before talk (LBT) procedure prior to communicating in order to determine whether the channel is available.
[0049] The small cell base station 102' may operate in a licensed and / or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell base station 102' may employ LTE or NR technology and use the same 5 GHz unlicensed frequency spectrum as used by the WLAN AP 150. The small cell base station 102', employing LTE / 5G in an unlicensed frequency spectrum, may boost coverage to and / or increase capacity of the access network. NR in unlicensed spectrum may be referred to as NR-U. LTE in an unlicensed spectrum may be referred to as LTE-U, licensed assisted access (LAA) , or
[0050] The wireless communications system 100 may further include a millimeter wave (mmW) base station 180 that may operate in mmW frequencies and / or near mmW frequencies in communication with a UE 182. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in this band may be referred to as a millimeter wave. Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW / near mmW radio frequency band have high path loss and a relatively short range. The mmW base station 180 and the UE 182 may utilize beamforming (transmit and / or receive) over a mmW communication link 184 to compensate for the extremely high path loss and short range. Further, it will be appreciated that in alternative configurations, one or more base stations 102 may also transmit using mmW or near mmW and beamforming. Accordingly, it will be appreciated that the foregoing illustrations are merely examples and should not be construed to limit the various aspects disclosed herein.
[0051] Transmit beamforming is a technique for focusing an RF signal in a specific direction. Traditionally, when a network node (e.g., a base station) broadcasts an RF signal, it broadcasts the signal in all directions (omni-directionally) . With transmit beamforming, the network node determines where a given target device (e.g., a UE) is located (relative to the transmitting network node) and projects a stronger downlink RF signal in that specific direction, thereby providing a faster (in terms of data rate) and stronger RF signal for the receiving device (s) . To change the directionality of the RF signal when transmitting, a network node can control the phase and relative amplitude of the RF signal at each of the one or more transmitters that are broadcasting the RF signal. For example, a network node may use an array of antennas (referred to as a “phased array” or an “antenna array” ) that creates a beam of RF waves that can be “steered” to point in different directions, without actually moving the antennas. Specifically, the RF current from the transmitter is fed to the individual antennas with the correct phase relationship so that the radio waves from the separate antennas add together to increase the radiation in a desired direction, while cancelling to suppress radiation in undesired directions.
[0052] Transmit beams may be quasi-co-located, meaning that they appear to the receiver (e.g., a UE) as having the same parameters, regardless of whether or not the transmitting antennas of the network node themselves are physically co-located. In NR, there are four types of quasi-co-location (QCL) relations. Specifically, a QCL relation of a given type means that certain parameters about a second reference RF signal on a second beam can be derived from information about a source reference RF signal on a source beam. Thus, if the source reference RF signal is QCL Type A, the receiver can use the source reference RF signal to estimate the Doppler shift, Doppler spread, average delay, and delay spread of a second reference RF signal transmitted on the same channel. If the source reference RF signal is QCL Type B, the receiver can use the source reference RF signal to estimate the Doppler shift and Doppler spread of a second reference RF signal transmitted on the same channel. If the source reference RF signal is QCL Type C, the receiver can use the source reference RF signal to estimate the Doppler shift and average delay of a second reference RF signal transmitted on the same channel. If the source reference RF signal is QCL Type D, the receiver can use the source reference RF signal to estimate the spatial receive parameter of a second reference RF signal transmitted on the same channel.
[0053] In receive beamforming, the receiver uses a receive beam to amplify RF signals detected on a given channel. For example, the receiver can increase the gain setting and / or adjust the phase setting of an array of antennas in a particular direction to amplify (e.g., to increase the gain level of) the RF signals received from that direction. Thus, when a receiver is said to beamform in a certain direction, it means the beam gain in that direction is high relative to the beam gain along other directions, or the beam gain in that direction is the highest compared to the beam gain in that direction of all other receive beams available to the receiver. This results in a stronger received signal strength (e.g., reference signal received power (RSRP) , reference signal received quality (RSRQ) , signal-to-interference-plus-noise ratio (SINR) , etc. ) of the RF signals received from that direction.
[0054] Transmit and receive beams may be spatially related. A spatial relation means that parameters for a second beam (e.g., a transmit or receive beam) for a second reference signal can be derived from information about a first beam (e.g., a receive beam or a transmit beam) for a first reference signal. For example, a UE may use a particular receive beam to receive a reference downlink reference signal (e.g., synchronization signal block (SSB) ) from a base station. The UE can then form a transmit beam for sending an uplink reference signal (e.g., sounding reference signal (SRS) ) to that base station based on the parameters of the receive beam.
[0055] Note that a “downlink” beam may be either a transmit beam or a receive beam, depending on the entity forming it. For example, if a base station is forming the downlink beam to transmit a reference signal to a UE, the downlink beam is a transmit beam. If the UE is forming the downlink beam, however, it is a receive beam to receive the downlink reference signal. Similarly, an “uplink” beam may be either a transmit beam or a receive beam, depending on the entity forming it. For example, if a base station is forming the uplink beam, it is an uplink receive beam, and if a UE is forming the uplink beam, it is an uplink transmit beam.
[0056] The electromagnetic spectrum is often subdivided, based on frequency / wavelength, into various classes, bands, channels, etc. In 5G NR two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) . It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the INTERNATIONAL TELECOMMUNICATION as a “millimeter wave” band.
[0057] The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHz –24.25 GHz) . Frequency bands falling within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus may effectively extend features of FR1 and / or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating 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.
[0058] With the above aspects in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or may be within the EHF band.
[0059] In a multi-carrier system, such as 5G, one of the carrier frequencies is referred to as the “primary carrier” or “anchor carrier” or “primary serving cell” or “PCell, ” and the remaining carrier frequencies are referred to as “secondary carriers” or “secondary serving cells” or “SCells. ” In carrier aggregation, the anchor carrier is the carrier operating on the primary frequency (e.g., FR1) utilized by a UE 104 / 182 and the cell in which the UE 104 / 182 either performs the initial radio resource control (RRC) connection establishment procedure or initiates the RRC connection re-establishment procedure. The primary carrier carries all common and UE-specific control channels, and may be a carrier in a licensed frequency (however, this is not always the case) . A secondary carrier is a carrier operating on a second frequency (e.g., FR2) that may be configured once the RRC connection is established between the UE 104 and the anchor carrier and that may be used to provide additional radio resources. In some cases, the secondary carrier may be a carrier in an unlicensed frequency. The secondary carrier may contain only necessary signaling information and signals, for example, those that are UE-specific may not be present in the secondary carrier, since both primary uplink and downlink carriers are typically UE-specific. This means that different UEs 104 / 182 in a cell may have different downlink primary carriers. The same is true for the uplink primary carriers. The network is able to change the primary carrier of any UE 104 / 182 at any time. This is done, for example, to balance the load on different carriers. Because a “serving cell” (whether a PCell or an SCell) corresponds to a carrier frequency / component carrier over which some base station is communicating, the term “cell, ” “serving cell, ” “component carrier, ” “carrier frequency, ” and the like can be used interchangeably.
[0060] For example, still referring to FIG. 1, one of the frequencies utilized by the macro cell base stations 102 may be an anchor carrier (or “PCell” ) and other frequencies utilized by the macro cell base stations 102 and / or the mmW base station 180 may be secondary carriers ( “SCells” ) . The simultaneous transmission and / or reception of multiple carriers enables the UE 104 / 182 to significantly increase its data transmission and / or reception rates. For example, two 20 MHz aggregated carriers in a multi-carrier system would theoretically lead to a two-fold increase in data rate (i.e., 40 MHz) , compared to that attained by a single 20 MHz carrier.
[0061] The wireless communications system 100 may further include a UE 164 that may communicate with a macro cell base station 102 over a communication link 120 and / or the mmW base station 180 over a mmW communication link 184. For example, the macro cell base station 102 may support a PCell and one or more SCells for the UE 164 and the mmW base station 180 may support one or more SCells for the UE 164.
[0062] In some cases, the UE 164 and the UE 182 may be capable of sidelink communication. Sidelink-capable UEs (SL-UEs) may communicate with base stations 102 over communication links 120 using the Uu interface (i.e., the air interface between a UE and a base station) . SL-UEs (e.g., UE 164, UE 182) may also communicate directly with each other over a wireless sidelink 160 using the PC5 interface (i.e., the air interface between sidelink-capable UEs) . A wireless sidelink (or just “sidelink” ) is an adaptation of the core cellular (e.g., LTE, NR) standard that allows direct communication between two or more UEs without the communication needing to go through a base station. Sidelink communication may be unicast or multicast, and may be used for device-to-device (D2D) media-sharing, vehicle-to-vehicle (V2V) communication, vehicle-to-everything (V2X) communication (e.g., cellular V2X (cV2X) communication, enhanced V2X (eV2X) communication, etc. ) , emergency rescue applications, etc. One or more of a group of SL-UEs utilizing sidelink communications may be within the geographic coverage area 110 of a base station 102. Other SL-UEs in such a group may be outside the geographic coverage area 110 of a base station 102 or be otherwise unable to receive transmissions from a base station 102. In some cases, groups of SL-UEs communicating via sidelink communications may utilize a one-to-many (1: M) system in which each SL-UE transmits to every other SL-UE in the group. In some cases, a base station 102 facilitates the scheduling of resources for sidelink communications. In other cases, sidelink communications are carried out between SL-UEs without the involvement of a base station 102.
[0063] In an aspect, the sidelink 160 may operate over a wireless communication medium of interest, which may be shared with other wireless communications between other vehicles and / or infrastructure access points, as well as other RATs. A “medium” may be composed of one or more time, frequency, and / or space communication resources (e.g., encompassing one or more channels across one or more carriers) associated with wireless communication between one or more transmitter / receiver pairs. In an aspect, the medium of interest may correspond to at least a portion of an unlicensed frequency band shared among various RATs. Although different licensed frequency bands have been reserved for certain communication systems (e.g., by a government entity such as the Federal Communications Commission (FCC) in the United States) , these systems, in particular those employing small cell access points, have recently extended operation into unlicensed frequency bands such as the Unlicensed National Information Infrastructure (U-NII) band used by wireless local area network (WLAN) technologies, most notably IEEE 802.11x WLAN technologies generally referred to as “Wi-Fi. ” Example systems of this type include different variants of CDMA systems, TDMA systems, FDMA systems, orthogonal FDMA (OFDMA) systems, single-carrier FDMA (SC-FDMA) systems, and so on.
[0064] Note that although FIG. 1 only illustrates two of the UEs as SL-UEs (i.e., UEs 164 and 182) , any of the illustrated UEs may be SL-UEs. Further, although only UE 182 was described as being capable of beamforming, any of the illustrated UEs, including UE 164, may be capable of beamforming. Where SL-UEs are capable of beamforming, they may beamform towards each other (i.e., towards other SL-UEs) , towards other UEs (e.g., UEs 104) , towards base stations (e.g., base stations 102, 180, small cell 102’ , access point 150) , etc. Thus, in some cases, UEs 164 and 182 may utilize beamforming over sidelink 160.
[0065] In the example of FIG. 1, any of the illustrated UEs (shown in FIG. 1 as a single UE 104 for simplicity) may receive signals 124 from one or more Earth orbiting space vehicles (SVs) 112 (e.g., satellites) . In an aspect, the SVs 112 may be part of a satellite positioning system that a UE 104 can use as an independent source of location information. A satellite positioning system typically includes a system of transmitters (e.g., SVs 112) positioned to enable receivers (e.g., UEs 104) to determine their location on or above the Earth based, at least in part, on positioning signals (e.g., signals 124) received from the transmitters. Such a transmitter typically transmits a signal marked with a repeating pseudo-random noise (PN) code of a set number of chips. While typically located in SVs 112, transmitters may sometimes be located on ground-based control stations, base stations 102, and / or other UEs 104. A UE 104 may include one or more dedicated receivers specifically designed to receive signals 124 for deriving geo location information from the SVs 112.
[0066] In a satellite positioning system, the use of signals 124 can be augmented by various satellite-based augmentation systems (SBAS) that may be associated with or otherwise enabled for use with one or more global and / or regional navigation satellite systems. For example an SBAS may include an augmentation system (s) that provides integrity information, differential corrections, etc., such as the Wide Area Augmentation System (WAAS) , the European Geostationary Navigation Overlay Service (EGNOS) , the Multi-functional Satellite Augmentation System (MSAS) , the Global Positioning System (GPS) Aided Geo Augmented Navigation or GPS and Geo Augmented Navigation system (GAGAN) , and / or the like. Thus, as used herein, a satellite positioning system may include any combination of one or more global and / or regional navigation satellites associated with such one or more satellite positioning systems.
[0067] In an aspect, SVs 112 may additionally or alternatively be part of one or more non-terrestrial networks (NTNs) . In an NTN, an SV 112 is connected to an earth station (also referred to as a ground station, NTN gateway, or gateway) , which in turn is connected to an element in a 5G network, such as a modified base station 102 (without a terrestrial antenna) or a network node in a 5GC. This element would in turn provide access to other elements in the 5G network and ultimately to entities external to the 5G network, such as Internet web servers and other user devices. In that way, a UE 104 may receive communication signals (e.g., signals 124) from an SV 112 instead of, or in addition to, communication signals from a terrestrial base station 102.
[0068] The wireless communications system 100 may further include one or more UEs, such as UE 190, that connects indirectly to one or more communication networks via one or more device-to-device (D2D) peer-to-peer (P2P) links (referred to as “sidelinks” ) . In the example of FIG. 1, UE 190 has a D2D P2P link 192 with one of the UEs 104 connected to one of the base stations 102 (e.g., through which UE 190 may indirectly obtain cellular connectivity) and a D2D P2P link 194 with WLAN STA 152 connected to the WLAN AP 150 (through which UE 190 may indirectly obtain WLAN-based Internet connectivity) . In an example, the D2D P2P links 192 and 194 may be supported with any well-known D2D RAT, such as LTE Direct (LTE-D) , WI-FI and so on.
[0069] FIG. 2A illustrates an example wireless network structure 200. For example, a 5GC 210 (also referred to as a Next Generation Core (NGC) ) can be viewed functionally as control plane (C-plane) functions 214 (e.g., UE registration, authentication, network access, gateway selection, etc. ) and user plane (U-plane) functions 212, (e.g., UE gateway function, access to data networks, IP routing, etc. ) which operate cooperatively to form the core network. User plane interface (NG-U) 213 and control plane interface (NG-C) 215 connect the gNB 222 to the 5GC 210 and specifically to the user plane functions 212 and control plane functions 214, respectively. In an additional configuration, an ng-eNB 224 may also be connected to the 5GC 210 via NG-C 215 to the control plane functions 214 and NG-U 213 to user plane functions 212. Further, ng-eNB 224 may directly communicate with gNB 222 via a backhaul connection 223. In some configurations, a Next Generation RAN (NG-RAN) 220 may have one or more gNBs 222, while other configurations include one or more of both ng-eNBs 224 and gNBs 222. Either (or both) gNB 222 or ng-eNB 224 may communicate with one or more UEs 204 (e.g., any of the UEs described herein) .
[0070] Another optional aspect may include a location server 230, which may be in communication with the 5GC 210 to provide location assistance for UE (s) 204. The location server 230 can be implemented as a plurality of separate servers (e.g., physically separate servers, different software modules on a single server, different software modules spread across multiple physical servers, etc. ) , or alternately may each correspond to a single server. The location server 230 can be configured to support one or more location services for UEs 204 that can connect to the location server 230 via the core network, 5GC 210, and / or via the Internet (not illustrated) . Further, the location server 230 may be integrated into a component of the core network, or alternatively may be external to the core network (e.g., a third party server, such as an original equipment manufacturer (OEM) server or service server) .
[0071] FIG. 2B illustrates another example wireless network structure 240. A 5GC 260 (which may correspond to 5GC 210 in FIG. 2A) can be viewed functionally as control plane functions, provided by an access and mobility management function (AMF) 264, and user plane functions, provided by a user plane function (UPF) 262, which operate cooperatively to form the core network (i.e., 5GC 260) . The functions of the AMF 264 include registration management, connection management, reachability management, mobility management, lawful interception, transport for session management (SM) messages between one or more UEs 204 (e.g., any of the UEs described herein) and a session management function (SMF) 266, transparent proxy services for routing SM messages, access authentication and access authorization, transport for short message service (SMS) messages between the UE 204 and the short message service function (SMSF) (not shown) , and security anchor functionality (SEAF) . The AMF 264 also interacts with an authentication server function (AUSF) (not shown) and the UE 204, and receives the intermediate key that was established as a result of the UE 204 authentication process. In the case of authentication based on a UMTS (universal mobile telecommunications system) subscriber identity module (USIM) , the AMF 264 retrieves the security material from the AUSF. The functions of the AMF 264 also include security context management (SCM) . The SCM receives a key from the SEAF that it uses to derive access-network specific keys. The functionality of the AMF 264 also includes location services management for regulatory services, transport for location services messages between the UE 204 and a location management function (LMF) 270 (which acts as a location server 230) , transport for location services messages between the NG-RAN 220 and the LMF 270, evolved packet system (EPS) bearer identifier allocation for interworking with the EPS, and UE 204 mobility event notification. In addition, the AMF 264 also supports functionalities for (Third Generation Partnership Project) access networks.
[0072] Functions of the UPF 262 include acting as an anchor point for intra / inter-RAT mobility (when applicable) , acting as an external protocol data unit (PDU) session point of interconnect to a data network (not shown) , providing packet routing and forwarding, packet inspection, user plane policy rule enforcement (e.g., gating, redirection, traffic steering) , lawful interception (user plane collection) , traffic usage reporting, quality of service (QoS) handling for the user plane (e.g., uplink / downlink rate enforcement, reflective QoS marking in the downlink) , uplink traffic verification (service data flow (SDF) to QoS flow mapping) , transport level packet marking in the uplink and downlink, downlink packet buffering and downlink data notification triggering, and sending and forwarding of one or more “end markers” to the source RAN node. The UPF 262 may also support transfer of location services messages over a user plane between the UE 204 and a location server, such as an SLP 272.
[0073] The functions of the SMF 266 include session management, UE Internet protocol (IP) address allocation and management, selection and control of user plane functions, configuration of traffic steering at the UPF 262 to route traffic to the proper destination, control of part of policy enforcement and QoS, and downlink data notification. The interface over which the SMF 266 communicates with the AMF 264 is referred to as the N11 interface.
[0074] Another optional aspect may include an LMF 270, which may be in communication with the 5GC 260 to provide location assistance for UEs 204. The LMF 270 can be implemented as a plurality of separate servers (e.g., physically separate servers, different software modules on a single server, different software modules spread across multiple physical servers, etc. ) , or alternately may each correspond to a single server. The LMF 270 can be configured to support one or more location services for UEs 204 that can connect to the LMF 270 via the core network, 5GC 260, and / or via the Internet (not illustrated) . The SLP 272 may support similar functions to the LMF 270, but whereas the LMF 270 may communicate with the AMF 264, NG-RAN 220, and UEs 204 over a control plane (e.g., using interfaces and protocols intended to convey signaling messages and not voice or data) , the SLP 272 may communicate with UEs 204 and external clients (e.g., third-party server 274) over a user plane (e.g., using protocols intended to carry voice and / or data like the transmission control protocol (TCP) and / or IP) .
[0075] Yet another optional aspect may include a third-party server 274, which may be in communication with the LMF 270, the SLP 272, the 5GC 260 (e.g., via the AMF 264 and / or the UPF 262) , the NG-RAN 220, and / or the UE 204 to obtain location information (e.g., a location estimate) for the UE 204. As such, in some cases, the third-party server 274 may be referred to as a location services (LCS) client or an external client. The third- party server 274 can be implemented as a plurality of separate servers (e.g., physically separate servers, different software modules on a single server, different software modules spread across multiple physical servers, etc. ) , or alternately may each correspond to a single server.
[0076] User plane interface 263 and control plane interface 265 connect the 5GC 260, and specifically the UPF 262 and AMF 264, respectively, to one or more gNBs 222 and / or ng-eNBs 224 in the NG-RAN 220. The interface between gNB (s) 222 and / or ng-eNB (s) 224 and the AMF 264 is referred to as the “N2” interface, and the interface between gNB(s) 222 and / or ng-eNB (s) 224 and the UPF 262 is referred to as the “N3” interface. The gNB (s) 222 and / or ng-eNB (s) 224 of the NG-RAN 220 may communicate directly with each other via backhaul connections 223, referred to as the “Xn-C” interface. One or more of gNBs 222 and / or ng-eNBs 224 may communicate with one or more UEs 204 over a wireless interface, referred to as the “Uu” interface.
[0077] The functionality of a gNB 222 may be divided between a gNB central unit (gNB-CU) 226, one or more gNB distributed units (gNB-DUs) 228, and one or more gNB radio units (gNB-RUs) 229. A gNB-CU 226 is a logical node that includes the base station functions of transferring user data, mobility control, radio access network sharing, positioning, session management, and the like, except for those functions allocated exclusively to the gNB-DU (s) 228. More specifically, the gNB-CU 226 generally host the radio resource control (RRC) , service data adaptation protocol (SDAP) , and packet data convergence protocol (PDCP) protocols of the gNB 222. A gNB-DU 228 is a logical node that generally hosts the radio link control (RLC) and medium access control (MAC) layer of the gNB 222. Its operation is controlled by the gNB-CU 226. One gNB-DU 228 can support one or more cells, and one cell is supported by only one gNB-DU 228. The interface 232 between the gNB-CU 226 and the one or more gNB-DUs 228 is referred to as the “F1” interface. The physical (PHY) layer functionality of a gNB 222 is generally hosted by one or more standalone gNB-RUs 229 that perform functions such as power amplification and signal transmission / reception. The interface between a gNB-DU 228 and a gNB-RU 229 is referred to as the “Fx” interface. Thus, a UE 204 communicates with the gNB-CU 226 via the RRC, SDAP, and PDCP layers, with a gNB-DU 228 via the RLC and MAC layers, and with a gNB-RU 229 via the PHY layer.
[0078] Deployment of communication systems, such as 5G NR systems, may be arranged in multiple manners with various components or constituent parts. In a 5G NR system, or network, a network node, a network entity, a mobility element of a network, a RAN node, a core network node, a network element, or a network equipment, such as a base station, or one or more units (or one or more components) performing base station functionality, may be implemented in an aggregated or disaggregated architecture. For example, a base station (such as a Node B (NB) , evolved NB (eNB) , NR base station, 5G NB, AP, TRP, cell, etc. ) may be implemented as an aggregated base station (also known as a standalone base station or a monolithic base station) or a disaggregated base station.
[0079] An aggregated base station may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node. A disaggregated base station may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more central or centralized units (CUs) , one or more distributed units (DUs) , or one or more radio units (RUs) ) . In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed throughout one or multiple other RAN nodes. The DUs may be implemented to communicate with one or more RUs. Each of the CU, DU and RU also can be implemented as virtual units, i.e., a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) .
[0080] Base station-type operation or network design may consider aggregation characteristics of base station functionality. For example, disaggregated base stations may be utilized in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (such as the network configuration sponsored by the O-RAN ) ) , or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN) ) . Disaggregation may include distributing functionality across two or more units at various physical locations, as well as distributing functionality for at least one unit virtually, which can enable flexibility in network design. The various units of the disaggregated base station, or disaggregated RAN architecture, can be configured for wired or wireless communication with at least one other unit.
[0081] FIG. 2C illustrates an example disaggregated base station architecture 250, according to aspects of the disclosure. The disaggregated base station architecture 250 may include one or more central units (CUs) 280 (e.g., gNB-CU 226) that can communicate directly with a core network 267 (e.g., 5GC 210, 5GC 260) via a backhaul link, or indirectly with the core network 267 through one or more disaggregated base station units (such as a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) 259 via an E2 link, or a Non-Real Time (Non-RT) RIC 257 associated with a Service Management and Orchestration (SMO) Framework 255, or both) . A CU 280 may communicate with one or more DUs 285 (e.g., gNB-DUs 228) via respective midhaul links, such as an F1 interface. The DUs 285 may communicate with one or more radio units (RUs) 287 (e.g., gNB-RUs 229) via respective fronthaul links. The RUs 287 may communicate with respective UEs 204 via one or more radio frequency (RF) access links. In some implementations, the UE 204 may be simultaneously served by multiple RUs 287.
[0082] Each of the units, i.e., the CUs 280, the DUs 285, the RUs 287, as well as the Near-RT RICs 259, the Non-RT RICs 257 and the SMO Framework 255, may include one or more interfaces or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units, or an associated processor or controller providing instructions to the communication interfaces of the units, can be configured to communicate with one or more of the other units via the transmission medium. For example, the units can include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other units. Additionally, the units can include a wireless interface, which may include a receiver, a transmitter or transceiver (such as a RF transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
[0083] In some aspects, the CU 280 may host one or more higher layer control functions. Such control functions can include RRC, PDCP, service data adaptation protocol (SDAP) , or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 280. The CU 280 may be configured to handle user plane functionality (i.e., Central Unit –User Plane (CU-UP) ) , control plane functionality (i.e., Central Unit –Control Plane (CU-CP) ) , or a combination thereof. In some implementations, the CU 280 can be logically split into one or more CU-UP units and one or more CU-CP units. The CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration. The CU 280 can be implemented to communicate with the DU 285, as necessary, for network control and signaling.
[0084] The DU 285 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 287. In some aspects, the DU 285 may host one or more of a RLC layer, a MAC layer, and one or more high PHY layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3rd Generation Partnership Project In some aspects, the DU 285 may further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 285, or with the control functions hosted by the CU 280.
[0085] Lower-layer functionality can be implemented by one or more RUs 287. In some deployments, an RU 287, controlled by a DU 285, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split. In such an architecture, the RU (s) 287 can be implemented to handle over the air (OTA) communication with one or more UEs 204. In some implementations, real-time and non-real-time aspects of control and user plane communication with the RU (s) 287 can be controlled by the corresponding DU 285. In some scenarios, this configuration can enable the DU (s) 285 and the CU 280 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0086] The SMO Framework 255 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 255 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements which may be managed via an operations and maintenance interface (such as an O1 interface) . For virtualized network elements, the SMO Framework 255 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 269) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface) . Such virtualized network elements can include, but are not limited to, CUs 280, DUs 285, RUs 287 and Near-RT RICs 259. In some implementations, the SMO Framework 255 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 261, via an O1 interface. Additionally, in some implementations, the SMO Framework 255 can communicate directly with one or more RUs 287 via an O1 interface. The SMO Framework 255 also may include a Non-RT RIC 257 configured to support functionality of the SMO Framework 255.
[0087] The Non-RT RIC 257 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updates, or policy-based guidance of applications / features in the Near-RT RIC 259. The Non-RT RIC 257 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 259. The Near-RT RIC 259 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 280, one or more DUs 285, or both, as well as an O-eNB, with the Near-RT RIC 259.
[0088] In some implementations, to generate AI / ML models to be deployed in the Near-RT RIC 259, the Non-RT RIC 257 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 259 and may be received at the SMO Framework 255 or the Non-RT RIC 257 from non-network data sources or from network functions. In some examples, the Non-RT RIC 257 or the Near-RT RIC 259 may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 257 may monitor long-term trends and patterns for performance and employ AI / ML models to perform corrective actions through the SMO Framework 255 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
[0089] FIGS. 3A, 3B, and 3C illustrate several example components (represented by corresponding blocks) that may be incorporated into a UE 302 (which may correspond to any of the UEs described herein) , a base station 304 (which may correspond to any of the base stations described herein) , and a network entity 306 (which may correspond to or embody any of the network functions described herein, including the location server 230 and the LMF 270, or alternatively may be independent from the NG-RAN 220 and / or 5GC 210 / 260 infrastructure depicted in FIGS. 2A and 2B, such as a private network) to support the operations described herein. It will be appreciated that these components may be implemented in different types of apparatuses in different implementations (e.g., in an ASIC, in a system-on-chip (SoC) , etc. ) . The illustrated components may also be incorporated into other apparatuses in a communication system. For example, other apparatuses in a system may include components similar to those described to provide similar functionality. Also, a given apparatus may contain one or more of the components. For example, an apparatus may include multiple transceiver components that enable the apparatus to operate on multiple carriers and / or communicate via different technologies.
[0090] The UE 302 and the base station 304 each include one or more wireless wide area network (WWAN) transceivers 310 and 350, respectively, providing means for communicating (e.g., means for transmitting, means for receiving, means for measuring, means for tuning, means for refraining from transmitting, etc. ) via one or more wireless communication networks (not shown) , such as an NR network, an LTE network, a GSM network, and / or the like. The WWAN transceivers 310 and 350 may each be connected to one or more antennas 316 and 356, respectively, for communicating with other network nodes, such as other UEs, access points, base stations (e.g., eNBs, gNBs) , etc., via at least one designated RAT (e.g., NR, LTE, GSM, etc. ) over a wireless communication medium of interest (e.g., some set of time / frequency resources in a particular frequency spectrum) . The WWAN transceivers 310 and 350 may be variously configured for transmitting and encoding signals 318 and 358 (e.g., messages, indications, information, and so on) , respectively, and, conversely, for receiving and decoding signals 318 and 358 (e.g., messages, indications, information, pilots, and so on) , respectively, in accordance with the designated RAT. Specifically, the WWAN transceivers 310 and 350 include one or more transmitters 314 and 354, respectively, for transmitting and encoding signals 318 and 358, respectively, and one or more receivers 312 and 352, respectively, for receiving and decoding signals 318 and 358, respectively.
[0091] The UE 302 and the base station 304 each also include, at least in some cases, one or more short-range wireless transceivers 320 and 360, respectively. The short-range wireless transceivers 320 and 360 may be connected to one or more antennas 326 and 366, respectively, and provide means for communicating (e.g., means for transmitting, means for receiving, means for measuring, means for tuning, means for refraining from transmitting, etc. ) with other network nodes, such as other UEs, access points, base stations, etc., via at least one designated RAT (e.g., Wi-Fi, LTE Direct, PC5, dedicated short-range communications (DSRC) , wireless access for vehicular environments (WAVE) , near-field communication (NFC) , ultra-wideband (UWB) , etc. ) over a wireless communication medium of interest. The short-range wireless transceivers 320 and 360 may be variously configured for transmitting and encoding signals 328 and 368 (e.g., messages, indications, information, and so on) , respectively, and, conversely, for receiving and decoding signals 328 and 368 (e.g., messages, indications, information, pilots, and so on) , respectively, in accordance with the designated RAT. Specifically, the short-range wireless transceivers 320 and 360 include one or more transmitters 324 and 364, respectively, for transmitting and encoding signals 328 and 368, respectively, and one or more receivers 322 and 362, respectively, for receiving and decoding signals 328 and 368, respectively. As specific examples, the short-range wireless transceivers 320 and 360 may be Wi-Fi transceivers, transceivers, and / or transceivers, NFC transceivers, UWB transceivers, or vehicle-to-vehicle (V2V) and / or vehicle-to-everything (V2X) transceivers.
[0092] The UE 302 and the base station 304 also include, at least in some cases, satellite signal receivers 330 and 370. The satellite signal receivers 330 and 370 may be connected to one or more antennas 336 and 376, respectively, and may provide means for receiving and / or measuring satellite positioning / communication signals 338 and 378, respectively. Where the satellite signal receivers 330 and 370 are satellite positioning system receivers, the satellite positioning / communication signals 338 and 378 may be global positioning system (GPS) signals, global navigation satellite system signals, Galileo signals, Beidou signals, Indian Regional Navigation Satellite System (NAVIC) , Quasi-Zenith Satellite System (QZSS) , etc. Where the satellite signal receivers 330 and 370 are non-terrestrial network (NTN) receivers, the satellite positioning / communication signals 338 and 378 may be communication signals (e.g., carrying control and / or user data) originating from a 5G network. The satellite signal receivers 330 and 370 may comprise any suitable hardware and / or software for receiving and processing satellite positioning / communication signals 338 and 378, respectively. The satellite signal receivers 330 and 370 may request information and operations as appropriate from the other systems, and, at least in some cases, perform calculations to determine locations of the UE 302 and the base station 304, respectively, using measurements obtained by any suitable satellite positioning system algorithm.
[0093] The base station 304 and the network entity 306 each include one or more network transceivers 380 and 390, respectively, providing means for communicating (e.g., means for transmitting, means for receiving, etc. ) with other network entities (e.g., other base stations 304, other network entities 306) . For example, the base station 304 may employ the one or more network transceivers 380 to communicate with other base stations 304 or network entities 306 over one or more wired or wireless backhaul links. As another example, the network entity 306 may employ the one or more network transceivers 390 to communicate with one or more base station 304 over one or more wired or wireless backhaul links, or with other network entities 306 over one or more wired or wireless core network interfaces.
[0094] A transceiver may be configured to communicate over a wired or wireless link. A transceiver (whether a wired transceiver or a wireless transceiver) includes transmitter circuitry (e.g., transmitters 314, 324, 354, 364) and receiver circuitry (e.g., receivers 312, 322, 352, 362) . A transceiver may be an integrated device (e.g., embodying transmitter circuitry and receiver circuitry in a single device) in some implementations, may comprise separate transmitter circuitry and separate receiver circuitry in some implementations, or may be embodied in other ways in other implementations. The transmitter circuitry and receiver circuitry of a wired transceiver (e.g., network transceivers 380 and 390 in some implementations) may be coupled to one or more wired network interface ports. Wireless transmitter circuitry (e.g., transmitters 314, 324, 354, 364) may include or be coupled to a plurality of antennas (e.g., antennas 316, 326, 356, 366) , such as an antenna array, that permits the respective apparatus (e.g., UE 302, base station 304) to perform transmit “beamforming, ” as described herein. Similarly, wireless receiver circuitry (e.g., receivers 312, 322, 352, 362) may include or be coupled to a plurality of antennas (e.g., antennas 316, 326, 356, 366) , such as an antenna array, that permits the respective apparatus (e.g., UE 302, base station 304) to perform receive beamforming, as described herein. In an aspect, the transmitter circuitry and receiver circuitry may share the same plurality of antennas (e.g., antennas 316, 326, 356, 366) , such that the respective apparatus can only receive or transmit at a given time, not both at the same time. A wireless transceiver (e.g., WWAN transceivers 310 and 350, short-range wireless transceivers 320 and 360) may also include a network listen module (NLM) or the like for performing various measurements.
[0095] As used herein, the various wireless transceivers (e.g., transceivers 310, 320, 350, and 360, and network transceivers 380 and 390 in some implementations) and wired transceivers (e.g., network transceivers 380 and 390 in some implementations) may generally be characterized as “a transceiver, ” “at least one transceiver, ” or “one or more transceivers. ” As such, whether a particular transceiver is a wired or wireless transceiver may be inferred from the type of communication performed. For example, backhaul communication between network devices or servers will generally relate to signaling via a wired transceiver, whereas wireless communication between a UE (e.g., UE 302) and a base station (e.g., base station 304) will generally relate to signaling via a wireless transceiver.
[0096] The UE 302, the base station 304, and the network entity 306 also include other components that may be used in conjunction with the operations as disclosed herein. The UE 302, the base station 304, and the network entity 306 include one or more processors 332, 384, and 394, respectively, for providing functionality relating to, for example, wireless communication, and for providing other processing functionality. The processors 332, 384, and 394 may therefore provide means for processing, such as means for determining, means for calculating, means for receiving, means for transmitting, means for indicating, etc. In an aspect, the processors 332, 384, and 394 may include, for example, one or more general purpose processors, multi-core processors, central processing units (CPUs) , ASICs, digital signal processors (DSPs) , field programmable gate arrays (FPGAs) , other programmable logic devices or processing circuitry, or various combinations thereof.
[0097] The UE 302, the base station 304, and the network entity 306 include memory circuitry implementing memories 340, 386, and 396 (e.g., each including a memory device) , respectively, for maintaining information (e.g., information indicative of reserved resources, thresholds, parameters, and so on) . The memories 340, 386, and 396 may therefore provide means for storing, means for retrieving, means for maintaining, etc. In some cases, the UE 302, the base station 304, and the network entity 306 may include sensing component 342, 388, and 398, respectively. The sensing component 342, 388, and 398 may be hardware circuits that are part of or coupled to the processors 332, 384, and 394, respectively, that, when executed, cause the UE 302, the base station 304, and the network entity 306 to perform the functionality described herein. In other aspects, the sensing component 342, 388, and 398 may be external to the processors 332, 384, and 394 (e.g., part of a modem processing system, integrated with another processing system, etc. ) . Alternatively, the sensing component 342, 388, and 398 may be memory modules stored in the memories 340, 386, and 396, respectively, that, when executed by the processors 332, 384, and 394 (or a modem processing system, another processing system, etc. ) , cause the UE 302, the base station 304, and the network entity 306 to perform the functionality described herein. FIG. 3A illustrates possible locations of the sensing component 342, which may be, for example, part of the one or more WWAN transceivers 310, the memory 340, the one or more processors 332, or any combination thereof, or may be a standalone component. FIG. 3B illustrates possible locations of the sensing component 388, which may be, for example, part of the one or more WWAN transceivers 350, the memory 386, the one or more processors 384, or any combination thereof, or may be a standalone component. FIG. 3C illustrates possible locations of the sensing component 398, which may be, for example, part of the one or more network transceivers 390, the memory 396, the one or more processors 394, or any combination thereof, or may be a standalone component.
[0098] The UE 302 may include one or more sensors 344 coupled to the one or more processors 332 to provide means for sensing or detecting movement and / or orientation information that is independent of motion data derived from signals received by the one or more WWAN transceivers 310, the one or more short-range wireless transceivers 320, and / or the satellite signal receiver 330. By way of example, the sensor (s) 344 may include an accelerometer (e.g., a micro-electrical mechanical systems (MEMS) device) , a gyroscope, a geomagnetic sensor (e.g., a compass) , an altimeter (e.g., a barometric pressure altimeter) , and / or any other type of movement detection sensor. Moreover, the sensor (s) 344 may include a plurality of different types of devices and combine their outputs in order to provide motion information. For example, the sensor (s) 344 may use a combination of a multi-axis accelerometer and orientation sensors to provide the ability to compute positions in two-dimensional (2D) and / or three-dimensional (3D) coordinate systems.
[0099] In addition, the UE 302 includes a user interface 346 providing means for providing indications (e.g., audible and / or visual indications) to a user and / or for receiving user input (e.g., upon user actuation of a sensing device such a keypad, a touch screen, a microphone, and so on) . Although not shown, the base station 304 and the network entity 306 may also include user interfaces.
[0100] Referring to the one or more processors 384 in more detail, in the downlink, IP packets from the network entity 306 may be provided to the processor 384. The one or more processors 384 may implement functionality for an RRC layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The one or more processors 384 may provide RRC layer functionality associated with broadcasting of system information (e.g., master information block (MIB) , system information blocks (SIBs) ) , RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release) , inter-RAT mobility, and measurement configuration for UE measurement reporting; 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 PDUs, error correction through automatic repeat request (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 mapping between logical channels and transport channels, scheduling information reporting, error correction, priority handling, and logical channel prioritization.
[0101] The transmitter 354 and the receiver 352 may implement Layer-1 (L1) functionality associated with various signal processing functions. Layer-1, which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding / decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation / demodulation of physical channels, and MIMO antenna processing. The transmitter 354 handles mapping to signal constellations 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 coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an orthogonal frequency division multiplexing (OFDM) subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM symbol stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and / or channel condition feedback transmitted by the UE 302. Each spatial stream may then be provided to one or more different antennas 356. The transmitter 354 may modulate an RF carrier with a respective spatial stream for transmission.
[0102] At the UE 302, the receiver 312 receives a signal through its respective antenna (s) 316. The receiver 312 recovers information modulated onto an RF carrier and provides the information to the one or more processors 332. The transmitter 314 and the receiver 312 implement Layer-1 functionality associated with various signal processing functions. The receiver 312 may perform spatial processing on the information to recover any spatial streams destined for the UE 302. If multiple spatial streams are destined for the UE 302, they may be combined by the receiver 312 into a single OFDM symbol stream. The receiver 312 then converts the OFDM symbol stream from the time-domain to the frequency domain using a fast Fourier transform (FFT) . The frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 304. These soft decisions may be based on channel estimates computed by a channel estimator. The soft decisions are then decoded and de-interleaved to recover the data and control signals that were originally transmitted by the base station 304 on the physical channel. The data and control signals are then provided to the one or more processors 332, which implements Layer-3 (L3) and Layer-2 (L2) functionality.
[0103] In the downlink, the one or more processors 332 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the core network. The one or more processors 332 are also responsible for error detection.
[0104] Similar to the functionality described in connection with the downlink transmission by the base station 304, the one or more processors 332 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, 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 through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with 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 through hybrid automatic repeat request (HARQ) , priority handling, and logical channel prioritization.
[0105] Channel estimates derived by the channel estimator from a reference signal or feedback transmitted by the base station 304 may be used by the transmitter 314 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the transmitter 314 may be provided to different antenna (s) 316. The transmitter 314 may modulate an RF carrier with a respective spatial stream for transmission.
[0106] The uplink transmission is processed at the base station 304 in a manner similar to that described in connection with the receiver function at the UE 302. The receiver 352 receives a signal through its respective antenna (s) 356. The receiver 352 recovers information modulated onto an RF carrier and provides the information to the one or more processors 384.
[0107] In the uplink, the one or more processors 384 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 302. IP packets from the one or more processors 384 may be provided to the core network. The one or more processors 384 are also responsible for error detection.
[0108] For convenience, the UE 302, the base station 304, and / or the network entity 306 are shown in FIGS. 3A, 3B, and 3C as including various components that may be configured according to the various examples described herein. It will be appreciated, however, that the illustrated components may have different functionality in different designs. In particular, various components in FIGS. 3A to 3C are optional in alternative configurations and the various aspects include configurations that may vary due to design choice, costs, use of the device, or other considerations. For example, in case of FIG. 3A, a particular implementation of UE 302 may omit the WWAN transceiver (s) 310 (e.g., a wearable device or tablet computer or personal computer (PC) or laptop may have Wi-Fi and / or capability without cellular capability) , or may omit the short-range wireless transceiver (s) 320 (e.g., cellular-only, etc. ) , or may omit the satellite signal receiver 330, or may omit the sensor (s) 344, and so on. In another example, in case of FIG. 3B, a particular implementation of the base station 304 may omit the WWAN transceiver (s) 350 (e.g., a Wi-Fi “hotspot” access point without cellular capability) , or may omit the short-range wireless transceiver (s) 360 (e.g., cellular-only, etc. ) , or may omit the satellite signal receiver 370, and so on. For brevity, illustration of the various alternative configurations is not provided herein, but would be readily understandable to one skilled in the art.
[0109] The various components of the UE 302, the base station 304, and the network entity 306 may be communicatively coupled to each other over data buses 334, 382, and 392, respectively. In an aspect, the data buses 334, 382, and 392 may form, or be part of, a communication interface of the UE 302, the base station 304, and the network entity 306, respectively. For example, where different logical entities are embodied in the same device (e.g., gNB and location server functionality incorporated into the same base station 304) , the data buses 334, 382, and 392 may provide communication between them.
[0110] The components of FIGS. 3A, 3B, and 3C may be implemented in various ways. In some implementations, the components of FIGS. 3A, 3B, and 3C may be implemented in one or more circuits such as, for example, one or more processors and / or one or more ASICs (which may include one or more processors) . Here, each circuit may use and / or incorporate at least one memory component for storing information or executable code used by the circuit to provide this functionality. For example, some or all of the functionality represented by blocks 310 to 346 may be implemented by processor and memory component (s) of the UE 302 (e.g., by execution of appropriate code and / or by appropriate configuration of processor components) . Similarly, some or all of the functionality represented by blocks 350 to 388 may be implemented by processor and memory component (s) of the base station 304 (e.g., by execution of appropriate code and / or by appropriate configuration of processor components) . Also, some or all of the functionality represented by blocks 390 to 398 may be implemented by processor and memory component (s) of the network entity 306 (e.g., by execution of appropriate code and / or by appropriate configuration of processor components) . For simplicity, various operations, acts, and / or functions are described herein as being performed “by a UE, ” “by a base station, ” “by a network entity, ” etc. However, as will be appreciated, such operations, acts, and / or functions may actually be performed by specific components or combinations of components of the UE 302, base station 304, network entity 306, etc., such as the processors 332, 384, 394, the transceivers 310, 320, 350, and 360, the memories 340, 386, and 396, the sensing component 342, 388, and 398, etc.
[0111] In some designs, the network entity 306 may be implemented as a core network component. In other designs, the network entity 306 may be distinct from a network operator or operation of the cellular network infrastructure (e.g., NG RAN 220 and / or 5GC 210 / 260) . For example, the network entity 306 may be a component of a private network that may be configured to communicate with the UE 302 via the base station 304 or independently from the base station 304 (e.g., over a non-cellular communication link, such as Wi-Fi) .
[0112] FIG. 4 illustrates example systems for wireless communication using a reconfigurable intelligent surface (RIS) , according to aspects of the disclosure. A RIS is a two-dimensional surface comprising a large number of low-cost, low-power, near-passive reflecting meta-elements whose properties are reconfigurable (e.g., by software or control signals) rather than static. For example, by carefully tuning the phase shifts of the reflecting meta-elements (e.g., using software or control signals) , the scattering, absorption, reflection, and diffraction properties of a RIS can be changed over time. In that way, the electromagnetic (EM) properties of a RIS can be engineered to collect wireless signals from a transmitter (e.g., a base station, a UE, etc. ) and passively beamform them towards a target receiver (e.g., another base station, another UE, etc. ) . In the example of FIG. 4, a base station 402 (labeled as a “TRP” ) controls the reflective properties of a RIS 410 in order to communicate with a UE 404.
[0113] The goal of RIS technology is to create smart radio environments, where the wireless propagation conditions are co-engineered with the physical layer signaling. This enhanced functionality can provide technical benefits in a number of scenarios.
[0114] A RIS (e.g., RIS 410) may be only reflective, only transmissive, or capable of simultaneously transmitting and reflecting. Diagram 400 illustrates an example scenario of a RIS 410 providing reflective functionality. Diagram 450 illustrates an example scenario of the RIS 410 providing transmissive functionality. As shown in FIG. 4, the base station 402 (e.g., any of the base station described herein) is attempting to transmit downlink wireless signals to the UE 404 (e.g., any of the UEs described herein) . However, because the UE 404 is behind an obstacle 420 (e.g., a building, a hill, or another type of obstacle) , it cannot receive the wireless signal on what would otherwise be the line-of-sight (LOS) beam from the base station 402. In this scenario, the base station 402 may instead transmit the wireless signal to the RIS 410, and configure the RIS 410 to reflect / beamform the incoming wireless signal towards the UE 404. The base station 402 can thereby transmit the wireless signal around the obstacle 420.
[0115] Note that the base station 402 may also configure the RIS 410 for the UE’s 404 use in the uplink. In that case, the base station 402 may configure the RIS 410 to reflect an uplink signal from the UE 404 to the base station 402, thereby enabling the UE 404-1 to transmit the uplink signal around the obstacle 420.
[0116] As another example scenario in which a RIS 410 can provide a technical advantage, the base station 402 may be aware that the obstacle 420 may create a “dead zone, ” that is, a geographic area in which the downlink wireless signals from the base station 402 are too attenuated to be reliably detected by a UE within that area (e.g., the UE 404) . In this scenario, the base station 402 may configure the RIS 410 to reflect downlink wireless signals into the dead zone in order to provide coverage to UEs that may be located there, including UEs about which the base station 402 is not aware.
[0117] A RIS (e.g., RIS 410) may be designed to operate in either a first mode (referred to as “Mode 1” ) , in which the RIS operates as a reconfigurable mirror, or a second mode (referred to as “Mode 2” ) , in which the RIS operates as a receiver and transmitter (similar to the amplify and forward functionality of a relay node) . Some RIS may be designed to be able to operate in either Mode 1 or Mode 2, while other RIS may be designed to operate only in either Mode 1 or Mode 2. Mode 1 RIS are assumed to have a negligible hardware group delay, whereas Mode 2 RIS have a non-negligible hardware group delay due to being equipped with limited baseband processing capability. Because of their greater processing capability compared to Mode 1 RIS, Mode 2 RIS may, in some cases, be able to compute and report their transmission-to-reception (Tx-Rx) time difference measurements (i.e., the difference between the time a signal is reflected towards a UE and the time the signal is received back from the UE) . In the example of FIG. 4, the RIS 410 may be either a Mode 1 or Mode 2 RIS.
[0118] Note that while FIG. 4 illustrates one RIS 410 and one base station controlling the RIS 410 (i.e., the base station 402) , the base station 402 may control multiple RIS 410. In addition, the RIS 410 may be controlled by multiple base stations 402.
[0119] FIG. 5 is a diagram of an example architecture of a RIS 500, according to aspects of the disclosure. The RIS 500, which may correspond to RIS 410 in FIG. 4, may be a Mode 1 RIS. As shown in FIG. 5, the RIS 500 primarily consists of a planar surface 510 and a controller 520. The planar surface 510 may be constructed of one or more layers of material. In the example of FIG. 5, the planar surface 510 may consist of three layers. In this case, the outer layer has a large number of reflecting elements 512 printed on a dielectric substrate to directly act on the incident signals. The middle layer is a copper panel to avoid signal / energy leakage. The last layer is a circuit board that is used for tuning the reflection coefficients of the reflecting elements 512 and is operated by the controller 520. The controller 520 may be a low-power processor, such as a field-programmable gate array (FPGA) .
[0120] In a typical operating scenario, the optimal reflection coefficients of the RIS 500 is calculated at the base station (e.g., the first base station 402-1 in FIG. 4) , and then sent to the controller 520 through a dedicated feedback link. The design of the reflection coefficients depends on the channel state information (CSI) , which is only updated when the CSI changes, which is on a much longer time scale than the data symbol duration. As such, low-rate information exchange is sufficient for the dedicated control link, which can be implemented using low-cost copper lines or simple cost-efficient wireless transceivers.
[0121] Each reflecting element 512 is coupled to a positive-intrinsic negative (PIN) diode 514. In addition, a biasing line 516 connects each reflecting element 512 in a column to the controller 520. By controlling the voltage through the biasing line 516, the PIN diodes 514 can switch between ‘on’ and ‘off’ modes. This can realize a phase shift difference of π (pi) in radians. To increase the number of phase shift levels, more PIN diodes 514 can be coupled to each reflecting element 512. In an aspect, the reflecting elements 512 can be grouped into subsets of reflecting elements that may be referred to as sub-panels. In that case, the reflective characteristics of the RIS 500 may be controllable on a sub-panel basis, where each sub-panel can be treated as a mini RIS co-located with other sub-panels.
[0122] An RIS, such as RIS 500, has important advantages for practical implementations. For example, the reflecting elements 512 only passively reflect the incoming signals without any sophisticated signal processing operations that would require RF transceiver hardware. As such, compared to conventional active transmitters, the RIS 500 can operate with several orders of magnitude lower cost in terms of hardware and power consumption. Additionally, due to the passive nature of the reflecting elements 512, an RIS 500 can be fabricated with light weight and limited layer thickness, and as such, can be readily installed on a wall, a ceiling, signage, a street lamp, etc. Further, the RIS 500 can operate in full-duplex (FD) mode without self-interference or introducing thermal noise. Therefore, it can achieve higher spectral efficiency than active half-duplex (HD) relays, despite their lower signal processing complexity than that of active FD relays requiring sophisticated self-interference cancelation.
[0123] FIG. 6 illustrates examples of reflective beamforming by a RIS, according to aspects of the disclosure. Diagram 600 illustrates an example of the general model of reflective beamforming by a RIS (e.g., RIS 410) . In the general model, for incident angle {θi, n} and reflection angle {θr, n} , the reflection gain (h) by the RIS is given as:
[0124] In the above equation, the term is the reflective coefficient of meta-element n. The variable d is the distance between the centers of the meta-elements of the RIS. The variable λ (lambda) represents the wavelength of the reflected signal.
[0125] Diagram 650 illustrates an example of the far-field model of reflective beamforming by a RIS (e.g., RIS 410) . In the far-field model, for incident angle θi and reflection angle θr, the reflection gain (h) by the RIS is given as:
[0126] In the above equation, the term is the reflective coefficient of meta-element n. The variable d is the distance between the centers of the meta-elements of the RIS. The variable λ (lambda) represents the wavelength of the reflected signal.
[0127] Ideally, In practice, however, {αn, φn} is derived from an enumerated set based on meta-element realization. The following table provides an example of the enumerated set:
[0128] Table 1
[0129] One of the main challenges for RIS is to determine the reflection coefficients of the meta-elements. To determine the reflection coefficients of the RIS, the incident beam direction and outgoing beam direction should be known. However, if the RIS is composed of all passive meta-elements, it can only reflect signals, it cannot receive the signals. Then, the signal receiver (e.g., the base station or the UE) can only estimate the overall cascaded channels of the base station to the UE via the RIS, but not the two separate channels (i.e., the base station to the RIS and the RIS to the UE) . Determining the incident / outgoing beam direction relies on highly resource-consuming beam sweeping.
[0130] To address this issue, hybrid RIS (H-RIS) have been introduced. FIG. 7 is a diagram 700 illustrating an example scenario involving an H-RIS, according to aspects of the disclosure. In an H-RIS, a small number of meta-elements that have sensing and signal processing functionality are added to or replace a part of the original set of passive meta-elements. These elements are connected to RF chains and a baseband processor so that they can be used to sense the direction of arrival (DoA) of the incident sensing signal. This is referred to as “sensing” the transmitter, and the sensing signal may be an SRS or other uplink or sidelink reference signal where the transmitter is a UE or a DL-PRS or other downlink reference signal where the transmitter is a base station. Based on the determined DoA, the H-RIS can know the direction of the transmitter for the following data signal reflection.
[0131] There are different reflection-sensing patterns for H-RIS. A first criterion for the reflection-sensing pattern is that, to measure the horizontal DoA and vertical DoA, the sensing elements should be placed in multiple rows and multiple columns. A second criterion is that, to reflect without an alias beam, the reflection elements should be placed adjacently. Based on these two criterions, to maximize the sensing and reflection performance, a typical pattern is to place the sensing elements along the borders of the H-RIS surface (including at least one horizontal border and one vertical border) .
[0132] FIG. 8 illustrates different hardware structures for H-RIS, according to aspects of the disclosure. Diagram 800 illustrates an example of a first H-RIS structure, in which each sensing element is connected to an individual RF chain, and each RF chain is in turn connected to a baseband processor. Diagram 850 illustrates an example of a second H-RIS structure, in which groups of sensing elements are connected to common RF chains, and the RF chains are in turn connected to a baseband processor. The first structure (diagram 800) is applicable to the case where the H-RIS has a small number of sensing elements, whereas the second structure (diagram 850) is applicable to the case where the H-RIS has a large number of sensing elements. The first structure can provide better sensing performance, but with higher hardware and power cost.
[0133] There are various issues associated with H-RIS implementation. For example, an H-RIS sensing report is different from a legacy sensing report (e.g., the sensing report associated with a non-hybrid RIS) . In a legacy sensing result report, the sensor (e.g., a UE) would report the measured metrics, such as DoA, delay, Doppler, distance, speed, etc. However, for H-RIS scenarios, in most cases, the sensing result (e.g., the DoA of the sensing signal) is only used by the H-RIS itself to generate the meta-element reflection coefficients. As such, the H-RIS only needs to report the success or failure of the sensing to the base station, but not the sensed metrics. This can reduce the report overhead, but decreases the amount of information available to the network.
[0134] As another example, the usage of the sensed DoA is not currently indicated by the base station. After the H-RIS senses a DoA value that corresponds to a UE, it would be beneficial for the base station to indicate the usage of this DoA to the H-RIS. For example, the base station should indicate whether to use this sensed DoA value in the downlink (i.e., use this DoA as a reflection’s outgoing direction) or the uplink (i.e., use this DoA as a reflection’s incident direction) .
[0135] As yet another example, time division multiplexing (TDM) and / or frequency division multiplexing (FDM) -based sensing and reflection may lead to a low spectrum utilization ratio. In current H-RIS operations, sensing and reflection are performed with different time-frequency resources. An H-RIS first senses the DoA of a target UE, and then switches off sensing and generates the meta-elements’ reflection coefficient based on the sensed DoA. The H-RIS can then sense another UE, and so on. However, such TDM / FDM-based sensing and reflection may lead to a low spectrum utilization ratio. In fact, as H-RIS can distinguish multiple DoA directions simultaneously, if it is indicated with some known DoA directions, it can still detect other unknown DoA directions. This provides the possibility of simultaneous reflection and sensing with the same time-frequency resource. Because DoA detection relies on the received sensing signal phase differences at multiple meta-elements, the H-RIS does not need decode the received signal. Thus, no matter which type of sensing signal is transmitted by the UE, the H-RIS can blindly detect the DoA without knowing the signal format.
[0136] Accordingly, the present disclosure provides signaling techniques to support efficient reflection and sensing by H-RIS. As a first technique, the base station may transmit a sensing signal resource configuration to an H-RIS, and then transmit an H-RIS-dedicated sensing report configuration to the H-RIS. Based on the dedicated configuration, the H-RIS can only report whether the sensing was a success or a failure.
[0137] As a second technique, the base station may configure an identifier of a previous sensing reference signal and an associated direction flag that indicates that the H-RIS is to use the derived DoA from the previous sensing signal resource as the current reflection’s incident and / or outgoing directions. The H-RIS then uses the incident and / or outgoing directions associated with the previous DoA to generate the downlink or uplink reflection coefficients.
[0138] As a third technique, to support simultaneous sensing and reflection, the base station may configure common radio resources for reflection and sensing, the reflection’s incident and sensing directions at the H-RIS, and an associated exclusion flag that represents whether to exclude the reflection’s incident direction from the sensed DoA results. If the exclusion flag is positive or negative, the H-RIS excludes or does not exclude, respectively, the reflection’s incident direction from the sensed DoA results.
[0139] FIG. 9 is a diagram 900 illustrating an example signaling flow for the first and second techniques described herein, according to aspects of the disclosure. The illustrated signaling flow is performed between a base station (illustrated as a gNB 222, but which may be any type of base station) , an H-RIS 908, and a UE 204.
[0140] At stage 905, the H-RIS 908 provides a capability report to the base station (gNB 222) . The capability report may include one or more capabilities related to sensing and reflection, and in particular, an indication of whether the H-RIS 908 supports simultaneous reflection and sensing.
[0141] At stage 910, the base station transmits, to the H-RIS 908, a reference signal (RS) resource configuration for the sensing signal to be transmitted by the UE 204 and a sensing report configuration. The reference signal resource configuration indicates the time-frequency resource on which the reference / sensing signal (e.g., SRS) will be transmitted by the UE 204 and received / sensed by the H-RIS 908. The sensing report configuration may optionally include one or more exclusion flags, as for the third technique described further below.
[0142] The sensing report configuration indicates at least the sensing report type. There may be three types of sensing reports. For the first type (denoted “Type 1” ) , the H-RIS 908 is configured to report one bit representing sensing success or sensing failure. Success (e.g., indicated by a value of “1” ) means that the H-RIS 908 detected at least one DoA. Failure (e.g., indicated by a value of “0” ) means that the H-RIS 908 did not detect any DoA. For the second type (denoted “Type 2” ) , the H-RIS 908 is configured to report the number of detected DoA values. Multiple detected DoAs may correspond to multiple paths due to multipath propagation or due to multiple UEs being scheduled (e.g., by the base station) to transmit simultaneously. For the third type (denoted “Type 3” ) , the H-RIS 908 is configured to report one or multiple detected DoA values. If the base station wants to determine the reflection coefficients rather than permit the H-RIS 908 to determine them, the base station may configure the H-RIS 908 to report the detected DoA values. In this case, the base station may also configure the number of detected DoA values to report.
[0143] At stage 915, the base station also transmits the reference signal (RS) resource configuration to the UE 204. At stage 920, the UE 204 transmits the configured reference / sensing signal (s) on the configured resource (s) .
[0144] At stage 925, the H-RIS 908 measures the DoA of the reference / sensing signal and reports, at stage 930, whether the sensing (i.e., determining the DoA of the reference / sensing signal) was a success or a failure. The H-RIS 908 can estimate a single DoA value by calculating the phase difference between two sensing elements in one direction (horizontal or vertical) . The H-RIS 908 can estimate multiple DoA values using one or more mathematical algorithms, such as the multiple signal classification (MUSIC) algorithm (an algorithm used for frequency estimation and radio direction finding) , compressive sensing (an algorithm for efficiently acquiring and reconstructing a signal by finding solutions to underdetermined linear systems) , and / or the like.
[0145] In the sensing report (stage 930) , one DoA value may be composed of a horizontal angle (θx) and a vertical angle (θy) , or an elevation angle (θ) and an azimuth angle Based on the configured report type, the H-RIS 908 may report one bit representing sensing success or sensing failure (Type 1) , the number of detected DoA values (Type 2) , or one or multiple detected DoA values (Type 3) . For Type 3, each DoA value may be represented as {θx, θy} or The sensing report may be a Layer-1 message, such as uplink control information (UCI) , MAC control element (MAC-CE) , or radio resource control (RRC) signaling.
[0146] At stage 935, the base station transmits a reflection configuration to the H-RIS 908. The configuration may include identifiers of one or multiple previous reference / sensing signal resources (that the H-RIS 908 sensed) and associated direction flags (e.g., Boolean values) that indicate whether the H-RIS 908 should use the DoA (s) derived based on the identified previous reference / sensing signal resource (s) as the current reflection’s incident and / or outgoing directions. For example, a Boolean value of “0” may indicate that the H-RIS 908 is to use the previously determined DoA as an incident angle and a Boolean value of “1” may indicate that the H-RIS 908 is to use the previously determined DoA as an outgoing angle. Alternatively, there may be two Boolean values, one indicating whether the H-RIS 908 is to use the previously determined DoA as an incident angle and one indicating whether the H-RIS 908 is to use the previously determined DoA as an outgoing angle. The previous sensing signal (s) may be the reference / sensing signal (s) transmitted and received at stage 920 or may be different reference / sensing signal (s) transmitted at another time by the same UE 204 or different UEs (but at the same general location as the current UE 204) .
[0147] As a first option, the base station may configure the identifier of one previous sensing signal resource and the associated direction flag (s) (e.g., one bit, indicating the incident or outgoing direction, or two bits, one indicating whether to use the incident direction and one indicating whether to use the outgoing direction) . In this case, the H-RIS 908 uses all its reflective meta-elements to generate the reflection beam whose incident and / or outgoing directions (based on the direction flag (s) ) are equal to the DoA value derived from this previous sensing signal resource.
[0148] As a second option, the base station may configure the identifiers of multiple previous sensing signal resources and their associated direction flags. In this case, the H-RIS 908 divides reflective meta-elements into multiple groups (e.g., where the number of groups is equal to the number of previous sensing signal resources) , and then uses one group of meta-elements (in a sub-surface) to generate the reflection beam whose incident and / or outgoing directions (based on the corresponding direction flag (s) ) are equal to the DoA value derived by one previous sensing signal resource. In some use cases, a set of previous sensing signal resources may share the same direction flag (s) .
[0149] This is illustrated in FIG. 10. Specifically, FIG. 10 illustrates an example scenario in which a base station configures the identifiers of multiple previous sensing signal resources and their associated direction flags, according to aspects of the disclosure. As shown in diagram 1000, an H-RIS (e.g., H-RIS 908) determines the DoA of sensing signals from two different UEs (labeled “UE1” and “UE2” ) . The controlling base station (illustrated as a gNB) then configures the H-RIS with direction flags indicating that the H-RIS is to use the DoAs (and therefore reflection coefficients) derived from the sensing signal resources received from the first and second UEs for subsequent reflections. Specifically, in the example of diagram 1050, the H-RIS is configured to use the previously determined DoA for UE1 as the outgoing angle for downlink data transmissions to UE1 and the previously determined DoA for UE2 as the incident angle for uplink data transmissions from UE2. That is, the direction flag (s) associated with UE1 would indicate that the H-RIS is to use the previously determined DoA for UE1 as the outgoing direction for downlink data transmissions to UE1, and the direction flag (s) associated with UE2 would indicate that the H-RIS is to use the previously determined DoA for UE2 as the incident direction for uplink data transmissions from UE2.
[0150] Note that while FIG. 10 illustrates only UE1 and UE2, as will be appreciated, the UEs in stage 2 may be different than the UEs in stage 1. Likewise, while the direction flags indicate one-way reflection (outgoing or incident) , as will be appreciated, the direction flags may be reversed in the case the communication direction is reversed (e.g., from downlink to uplink) . Alternatively, the direction flags may indicate that the H-RIS is to use both incident and outgoing directions for both UEs, as may be the case for two-way communication (downlink and uplink) between the base station and a respective UE.
[0151] Returning to FIG. 9, at stage 940, the H-RIS 908 uses the DoA and direction flag (s) to generate the downlink or uplink reflection coefficients. Specifically, if the direction flag indicates that the H-RIS 908 should not use the DoA derived based on a previous reference / sensing signal, then the H-RIS 908 may generate the downlink or uplink reflection coefficients based on the DoA associated with the reference signal (s) received at stage 920. Alternatively, if the direction flag indicates that the H-RIS 908 should use the DoA derived based on a previous reference / sensing signal, then the H-RIS 908 may generate the downlink and / or uplink reflection coefficients based on the DoA associated with the previous reference signal.
[0152] At stage 945, the base station transmits a configuration for a subsequent downlink (DL) or uplink (UL) data transmission. At stage 950, the base station transmits the downlink data using the configuration from stage 945 and the H-RIS 908 reflects the downlink data based on the determined downlink reflection coefficients. Alternatively, at stage 955, the UE 204 transmits uplink data using the configuration from stage 945 and the H-RIS 908 reflects the uplink data based on the determined uplink reflection coefficients.
[0153] Referring now to the third technique described herein in greater detail, to support simultaneous reflection and sensing, a base station (e.g., gNB 222 in FIG. 9) may indicate common radio resource for reflection and sensing, identifiers of one or multiple reflections’ incident directions, a scope of sensing directions, and the associated exclusion flag (positive or negative) to an H-RIS (e.g., H-RIS 908) . The identifiers of the one or multiple reflections’ incident directions may be based on the DoA of the indicated previous sensing signals whose direction flag is incident (as in the second technique described herein) . A scope of the sensing directions may include horizontal and / or vertical starting angle (s) and ending angle (s) .
[0154] If the scope of the sensing directions covers a configured reflection’s incident direction, and if the configured exclusion flag is positive, the H-RIS does not include the indicated reflection’s incident direction in its sensing result report, as at stage 930 of FIG. 9 (for Type 2 and Type 3 reports in the first technique described herein) . For Type 1 sensing reports, the H-RIS reports sensing failure if the sensing result only includes the indicated reflection’s incident directions. This option may be used when the UE is static, as the H-RIS does not need to track the movement of a UE whose DoA was detected before.
[0155] If the scope of the sensing directions covers a configured reflection’s incident direction, and if the configured exclusion flag is negative, the H-RIS is expected to include the indicated reflection’s incident direction in its sensing result report, as at stage 930 of FIG. 9 (for Type 2 and Type 3 reports) . For Type 1 sensing report, the H-RIS reports sensing success if the sensing result only includes the indicated reflection’s incident direction. This option may be used when the UE is moving, as the H-RIS needs to track the movement of a UE whose DoA was previously detected.
[0156] If the scope of the sensing directions does not cover the configured reflection’s incident direction, the configured exclusion flag is considered invalid.
[0157] FIG. 11 is a diagram illustrating different scopes of the sensing directions, according to aspects of the disclosure. In the example of FIG. 11, the scope of the sensing directions is illustrated as a dashed cone. As shown in diagram 1100, the scope of the sensing directions covers the configured reflection’s incident directions. That is, the scope of the sensing directions associated with a to-be-sensed UE (labeled “UE1” ) covers the incident angle of the reflection direction of a to-be-reflected UE (labeled “UE2” ) . In contrast, as shown in diagram 1150, the scope of the sensing directions does not cover the configured reflection’s incident direction. That is, the scope of the sensing directions associated with the to-be-sensed UE (UE1) does not cover the incident angle of the reflection direction of the to-be-reflected UE (UE2) .
[0158] With continued reference to the third technique described herein, the present disclosure provides further techniques for interference mitigation by the H-RIS. FIG. 12 is a diagram 1200 illustrating different types of interference at an H-RIS, according to aspects of the disclosure. As shown in FIG. 12, there are two types of interference, reflection-to- sensing interference and sensing-to-reflection interference. Reflection-to-sensing interference is where the reflection of the data signal may interfere with the sensing of the sensing signal. Sensing-to-reflection interference is where the sensing of the sensing signal may interfere with the reflection of the data signal.
[0159] Regarding reflection-to-sensing interference mitigation by an H-RIS, the H-RIS may be indicated (e.g., by the controlling base station) with the existence of a reflection’s incident directions so that it can mitigate the interference in sensing signal processing and exclude these directions from its sensing result to reduce reporting overhead. Regarding sensing-to-reflection interference mitigation by an H-RIS, the H-RIS may generate reflection coefficients that can reduce the reflection beamforming gain from the one or multiple sensing directions to the target outgoing direction.
[0160] As will be appreciated, the foregoing techniques provide a number of technical advantages. For example, the techniques disclosed herein can reduce report overhead (based on the first technique disclosed herein) , allow flexible reflection coefficient generation (based on the second technique disclosed herein) , and improve the spectrum utilization ratio (based on the third technique described herein) .
[0161] FIG. 13 illustrates an example method 1300 of wireless communication, according to aspects of the disclosure. In an aspect, method 1300 may be performed by a network node (e.g., any of the base stations or base station components described herein) .
[0162] At 1310, the network node transmits, to an H-RIS (e.g., H-RIS 908) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node (e.g., one or more UEs) , as at stage 910 of FIG. 9. In an aspect, operation 1310 may be performed by the one or more WWAN transceivers 350, the one or more short-range wireless transceivers 360, the one or more processors 384, memory 386, and / or sensing component 388, any or all of which may be considered means for performing this operation.
[0163] At 1320, the network node transmits, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a DoA of the one or more reference signal resources, (2) a number of DoA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DoA measurements, as at stage 910 of FIG. 9. In an aspect, operation 1320 may be performed by the one or more WWAN transceivers 350, the one or more short-range wireless transceivers 360, the one or more processors 384, memory 386, and / or sensing component 388, any or all of which may be considered means for performing this operation.
[0164] At 1330, the network node receives, from the H-RIS, a sensing result report indicating the type of the sensing result, as at stage 930 of FIG. 9. In an aspect, operation 1330 may be performed by the one or more WWAN transceivers 350, the one or more short-range wireless transceivers 360, the one or more processors 384, memory 386, and / or sensing component 388, any or all of which may be considered means for performing this operation.
[0165] FIG. 14 illustrates an example method 1400 of wireless communication, according to aspects of the disclosure. In an aspect, method 1400 may be performed by an H-RIS (e.g., any of the H-RIS described herein) .
[0166] At 1410, the H-RIS receives, from a network node (e.g., a base station) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node, as at stage 910 of FIG. 9. In an aspect, operation 1410 may be performed by the planar surface 510, reflecting elements 512, PIN diodes 514, and / or the controller 520, any or all of which may be considered means for performing this operation.
[0167] At 1420, the H-RIS receives, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a DoA of the one or more reference signal resources, (2) a number of DoA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DoA measurements, as at stage 910 of FIG. 9. In an aspect, operation 1420 may be performed by the planar surface 510, reflecting elements 512, PIN diodes 514, and / or the controller 520, any or all of which may be considered means for performing this operation.
[0168] At 1430, the H-RIS transmits, to the network node, a sensing result report indicating the type of the sensing result, as at stage 930 of FIG. 9. In an aspect, operation 1430 may be performed by the planar surface 510, reflecting elements 512, PIN diodes 514, and / or the controller 520, any or all of which may be considered means for performing this operation.
[0169] As will be appreciated, a technical advantage of the methods 1300 and 1400 is reduced report overhead and more flexible reflection coefficient generation.
[0170] In the detailed description above it can be seen that different features are grouped together in examples. This manner of disclosure should not be understood as an intention that the example clauses have more features than are explicitly mentioned in each clause. Rather, the various aspects of the disclosure may include fewer than all features of an individual example clause disclosed. Therefore, the following clauses should hereby be deemed to be incorporated in the description, wherein each clause by itself can stand as a separate example. Although each dependent clause can refer in the clauses to a specific combination with one of the other clauses, the aspect (s) of that dependent clause are not limited to the specific combination. It will be appreciated that other example clauses can also include a combination of the dependent clause aspect (s) with the subject matter of any other dependent clause or independent clause or a combination of any feature with other dependent and independent clauses. The various aspects disclosed herein expressly include these combinations, unless it is explicitly expressed or can be readily inferred that a specific combination is not intended (e.g., contradictory aspects, such as defining an element as both an electrical insulator and an electrical conductor) . Furthermore, it is also intended that aspects of a clause can be included in any other independent clause, even if the clause is not directly dependent on the independent clause.
[0171] Implementation examples are described in the following numbered clauses:
[0172] Clause 1. A method of wireless communication performed by a network node, comprising: transmitting, to a hybrid reconfigurable intelligent surface (H-RIS) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; transmitting, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and receiving, from the H-RIS, a sensing result report indicating the type of the sensing result.
[0173] Clause 2. The method of clause 1, wherein: the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and the indication comprises a flag indicating that the H-RIS successfully sensed the DOA of the one or more reference signal resources or that the H-RIS failed to sense the DOA of the one or more reference signal resources.
[0174] Clause 3. The method of clause 1, wherein: the type of the sensing result comprises the number of DOA measurements, and the number of DOA measurements corresponds to a number of multipaths of the one or more reference signal resources, a number of multiple second network nodes transmitting the one or more reference signal resources, or both.
[0175] Clause 4. The method of clause 1, wherein: the type of the sensing result comprises the one or more values of the DOA measurements, and the method further comprises: transmitting, to the H-RIS, reflection coefficients for the H-RIS based on the one or more values of the DOA measurements.
[0176] Clause 5. The method of clause 4, wherein each of the one or more values of the DOA measurements comprises: a horizontal angle and a vertical angle, or an elevation angle and an azimuth angle.
[0177] Clause 6. The method of any of clauses 1 to 5, wherein the reference signal configuration further indicates identifiers of one or more previously transmitted reference signal resources and associated direction flags.
[0178] Clause 7. The method of clause 6, wherein: the identifiers of the one or more previously transmitted reference signal resources and the associated direction flags configure the H-RIS to transmit in a same direction as the one or more previously transmitted reference signal resources, and each direction flag configures the H-RIS to use a DoA value derived based on a previously transmitted reference signal resource as an incident direction or an outgoing direction for a reflection.
[0179] Clause 8. The method of any of clauses 6 to 7, wherein: the one or more reference signal resources are configured for both sensing and reflection by the H-RIS, and the reference signal configuration further indicates one or more reflection directions associated with the one or more reference signal resources, one or more sensing directions associated with the one or more reference signal resources, and an exclusion flag.
[0180] Clause 9. The method of clause 8, wherein the one or more reflection directions are based on DOA measurements of the one or more previously transmitted reference signal resources having an associated direction flag indicating a same direction as the one or more reflection directions.
[0181] Clause 10. The method of any of clauses 8 to 9, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is positive, and the sensing result report does not include reflection directions of the one or more reference signal resources.
[0182] Clause 11. The method of any of clauses 8 to 9, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is positive, the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and based on the sensing result only including reflection directions of the one or more reference signal resources, the sensing result report indicates that the H-RIS failed to sense the DOA of the one or more reference signal resources.
[0183] Clause 12. The method of any of clauses 8 to 9, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is negative, and the sensing result report includes reflection directions of the one or more reference signal resources.
[0184] Clause 13. The method of any of clauses 8 to 9 and 12, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is negative, the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and based on the sensing result only including reflection directions of the one or more reference signal resources, the sensing result report indicates that the H-RIS successfully sensed the DOA of the one or more reference signal resources.
[0185] Clause 14. The method of any of clauses 8 to 9, wherein: the one or more sensing directions do not overlap with the one or more reflection directions, and the exclusion flag is invalid.
[0186] Clause 15. The method of any of clauses 8 to 14, wherein each of the one or more sensing directions is indicated as a start angle and an end angle.
[0187] Clause 16. The method of any of clauses 1 to 15, further comprising: receiving, from the H-RIS, a capability message indicating whether the H-RIS is capable of performing simultaneous reflection and sensing.
[0188] Clause 17. The method of any of clauses 1 to 16, wherein: the network node is a base station, the at least one second network node is at least one user equipment (UE) , and the one or more reference signal resources are one or more sounding reference signal (SRS) resources.
[0189] Clause 18. A method of wireless communication performed by a hybrid reconfigurable intelligent surface (H-RIS) , comprising: receiving, from a network node, a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; receiving, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and transmitting, to the network node, a sensing result report indicating the type of the sensing result.
[0190] Clause 19. The method of clause 18, further comprising: determining the one or more values of the DOA measurements based on a phase difference between two sensing elements in a horizontal direction or a vertical direction.
[0191] Clause 20. The method of any of clauses 18 to 19, wherein the reference signal configuration further indicates identifiers of one or more previously transmitted reference signal resources and associated direction flags, wherein each direction flag configures the H-RIS to use a DoA value derived based on a previously transmitted reference signal resource as an incident direction or an outgoing direction for a reflection.
[0192] Clause 21. The method of clause 20, further comprising: transmitting in a same direction as the one or more previously transmitted reference signal resources based on the identifiers of the one or more previously transmitted reference signal resources and the associated direction flags.
[0193] Clause 22. The method of clause 21, wherein, based on the one or more reference signal resources consisting of a single reference signal resource, the single reference signal resource is transmitted using all reflective meta-elements of the H-RIS.
[0194] Clause 23. The method of any of clauses 21 to 22, wherein, based on the one or more reference signal resources comprising a plurality of reference signal resources, each of the plurality of reference signal resources is transmitted using a sub-group of reflective meta-elements of the H-RIS.
[0195] Clause 24. The method of any of clauses 20 to 23, wherein: the one or more reference signal resources are configured for both sensing and reflection by the H-RIS, and the reference signal configuration further indicates one or more reflection directions associated with the one or more reference signal resources, one or more sensing directions associated with the one or more reference signal resources, and an exclusion flag.
[0196] Clause 25. The method of clause 24, wherein the reference signal configuration indicates the one or more reflection directions to enable the H-RIS to mitigate interference in processing the one or more reference signal resources in the one or more sensing directions and to exclude the one or more reflection directions from the sensing result report.
[0197] Clause 26. The method of any of clauses 24 to 25, further comprising: generating reflection coefficients that reduce reflection beamforming gain from the one or more sensing directions to the one or more reflection directions.
[0198] Clause 27. The method of any of clauses 20 to 26, wherein: the one or more reflection directions are based on DOA measurements of the one or more previously transmitted reference signal resources having an associated direction flag indicating a same direction as the one or more reflection directions.
[0199] Clause 28. The method of any of clauses 18 to 27, further comprising: transmitting, to the network node, a capability message indicating whether the H-RIS is capable of performing simultaneous reflection and sensing.
[0200] Clause 29. A network node, comprising: one or more memories; one or more transceivers; and one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to: transmit, via the one or more transceivers, to a hybrid reconfigurable intelligent surface (H-RIS) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; transmit, via the one or more transceivers, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and receive, via the one or more transceivers, from the H-RIS, a sensing result report indicating the type of the sensing result.
[0201] Clause 30. The network node of clause 29, wherein: the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and the indication comprises a flag indicating that the H-RIS successfully sensed the DOA of the one or more reference signal resources or that the H-RIS failed to sense the DOA of the one or more reference signal resources.
[0202] Clause 31. The network node of clause 29, wherein: the type of the sensing result comprises the number of DOA measurements, and the number of DOA measurements corresponds to a number of multipaths of the one or more reference signal resources, a number of multiple second network nodes transmitting the one or more reference signal resources, or both.
[0203] Clause 32. The network node of clause 29, wherein: the type of the sensing result comprises the one or more values of the DOA measurements, and the one or more processors, either alone or in combination, are further configured to transmit, via the one or more transceivers, to the H-RIS, reflection coefficients for the H-RIS based on the one or more values of the DOA measurements.
[0204] Clause 33. The network node of clause 32, wherein each of the one or more values of the DOA measurements comprises: a horizontal angle and a vertical angle, or an elevation angle and an azimuth angle.
[0205] Clause 34. The network node of any of clauses 29 to 33, wherein the reference signal configuration further indicates identifiers of one or more previously transmitted reference signal resources and associated direction flags.
[0206] Clause 35. The network node of clause 34, wherein: the identifiers of the one or more previously transmitted reference signal resources and the associated direction flags configure the H-RIS to transmit in a same direction as the one or more previously transmitted reference signal resources, and each direction flag configures the H-RIS to use a DoA value derived based on a previously transmitted reference signal resource as an incident direction or an outgoing direction for a reflection.
[0207] Clause 36. The network node of any of clauses 34 to 35, wherein: the one or more reference signal resources are configured for both sensing and reflection by the H-RIS, and the reference signal configuration further indicates one or more reflection directions associated with the one or more reference signal resources, one or more sensing directions associated with the one or more reference signal resources, and an exclusion flag.
[0208] Clause 37. The network node of clause 36, wherein the one or more reflection directions are based on DOA measurements of the one or more previously transmitted reference signal resources having an associated direction flag indicating a same direction as the one or more reflection directions.
[0209] Clause 38. The network node of any of clauses 36 to 37, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is positive, and the sensing result report does not include reflection directions of the one or more reference signal resources.
[0210] Clause 39. The network node of any of clauses 36 to 37, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is positive, the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and based on the sensing result only including reflection directions of the one or more reference signal resources, the sensing result report indicates that the H-RIS failed to sense the DOA of the one or more reference signal resources.
[0211] Clause 40. The network node of any of clauses 36 to 37, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is negative, and the sensing result report includes reflection directions of the one or more reference signal resources.
[0212] Clause 41. The network node of any of clauses 36 to 37 and 40, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is negative, the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and based on the sensing result only including reflection directions of the one or more reference signal resources, the sensing result report indicates that the H-RIS successfully sensed the DOA of the one or more reference signal resources.
[0213] Clause 42. The network node of any of clauses 36 to 37, wherein: the one or more sensing directions do not overlap with the one or more reflection directions, and the exclusion flag is invalid.
[0214] Clause 43. The network node of any of clauses 36 to 42, wherein each of the one or more sensing directions is indicated as a start angle and an end angle.
[0215] Clause 44. The network node of any of clauses 29 to 43, wherein the one or more processors, either alone or in combination, are further configured to: receive, via the one or more transceivers, from the H-RIS, a capability message indicating whether the H-RIS is capable of performing simultaneous reflection and sensing.
[0216] Clause 45. The network node of any of clauses 29 to 44, wherein: the network node is a base station, the at least one second network node is at least one user equipment (UE) , and the one or more reference signal resources are one or more sounding reference signal (SRS) resources.
[0217] Clause 46. A hybrid reconfigurable intelligent surface (H-RIS) , comprising: one or more memories; one or more transceivers; and one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to: receive, via the one or more transceivers, from a network node, a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; receive, via the one or more transceivers, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and transmit, via the one or more transceivers, to the network node, a sensing result report indicating the type of the sensing result.
[0218] Clause 47. The H-RIS of clause 46, wherein the one or more processors, either alone or in combination, are further configured to: determine the one or more values of the DOA measurements based on a phase difference between two sensing elements in a horizontal direction or a vertical direction.
[0219] Clause 48. The H-RIS of any of clauses 46 to 47, wherein the reference signal configuration further indicates identifiers of one or more previously transmitted reference signal resources and associated direction flags, wherein each direction flag configures the H-RIS to use a DoA value derived based on a previously transmitted reference signal resource as an incident direction or an outgoing direction for a reflection.
[0220] Clause 49. The H-RIS of clause 48, wherein the one or more processors, either alone or in combination, are further configured to: transmit, via the one or more transceivers, in a same direction as the one or more previously transmitted reference signal resources based on the identifiers of the one or more previously transmitted reference signal resources and the associated direction flags.
[0221] Clause 50. The H-RIS of clause 49, wherein, based on the one or more reference signal resources consisting of a single reference signal resource, the single reference signal resource is transmitted using all reflective meta-elements of the H-RIS.
[0222] Clause 51. The H-RIS of any of clauses 49 to 50, wherein, based on the one or more reference signal resources comprising a plurality of reference signal resources, each of the plurality of reference signal resources is transmitted using a sub-group of reflective meta-elements of the H-RIS.
[0223] Clause 52. The H-RIS of any of clauses 48 to 51, wherein: the one or more reference signal resources are configured for both sensing and reflection by the H-RIS, and the reference signal configuration further indicates one or more reflection directions associated with the one or more reference signal resources, one or more sensing directions associated with the one or more reference signal resources, and an exclusion flag.
[0224] Clause 53. The H-RIS of clause 52, wherein the reference signal configuration indicates the one or more reflection directions to enable the H-RIS to mitigate interference in processing the one or more reference signal resources in the one or more sensing directions and to exclude the one or more reflection directions from the sensing result report.
[0225] Clause 54. The H-RIS of any of clauses 52 to 53, wherein the one or more processors, either alone or in combination, are further configured to: generate reflection coefficients that reduce reflection beamforming gain from the one or more sensing directions to the one or more reflection directions.
[0226] Clause 55. The H-RIS of any of clauses 48 to 54, wherein: the one or more reflection directions are based on DOA measurements of the one or more previously transmitted reference signal resources having an associated direction flag indicating a same direction as the one or more reflection directions.
[0227] Clause 56. The H-RIS of any of clauses 46 to 55, wherein the one or more processors, either alone or in combination, are further configured to: transmit, via the one or more transceivers, to the network node, a capability message indicating whether the H-RIS is capable of performing simultaneous reflection and sensing.
[0228] Clause 57. A network node, comprising: means for transmitting, to a hybrid reconfigurable intelligent surface (H-RIS) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; means for transmitting, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and means for receiving, from the H-RIS, a sensing result report indicating the type of the sensing result.
[0229] Clause 58. The network node of clause 57, wherein: the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and the indication comprises a flag indicating that the H-RIS successfully sensed the DOA of the one or more reference signal resources or that the H-RIS failed to sense the DOA of the one or more reference signal resources.
[0230] Clause 59. The network node of clause 57, wherein: the type of the sensing result comprises the number of DOA measurements, and the number of DOA measurements corresponds to a number of multipaths of the one or more reference signal resources, a number of multiple second network nodes transmitting the one or more reference signal resources, or both.
[0231] Clause 60. The network node of clause 57, wherein: the type of the sensing result comprises the one or more values of the DOA measurements, and the network node further comprises means for transmitting, to the H-RIS, reflection coefficients for the H-RIS based on the one or more values of the DOA measurements.
[0232] Clause 61. The network node of clause 60, wherein each of the one or more values of the DOA measurements comprises: a horizontal angle and a vertical angle, or an elevation angle and an azimuth angle.
[0233] Clause 62. The network node of any of clauses 57 to 61, wherein the reference signal configuration further indicates identifiers of one or more previously transmitted reference signal resources and associated direction flags.
[0234] Clause 63. The network node of clause 62, wherein: the identifiers of the one or more previously transmitted reference signal resources and the associated direction flags configure the H-RIS to transmit in a same direction as the one or more previously transmitted reference signal resources, and each direction flag configures the H-RIS to use a DoA value derived based on a previously transmitted reference signal resource as an incident direction or an outgoing direction for a reflection.
[0235] Clause 64. The network node of any of clauses 62 to 63, wherein: the one or more reference signal resources are configured for both sensing and reflection by the H-RIS, and the reference signal configuration further indicates one or more reflection directions associated with the one or more reference signal resources, one or more sensing directions associated with the one or more reference signal resources, and an exclusion flag.
[0236] Clause 65. The network node of clause 64, wherein the one or more reflection directions are based on DOA measurements of the one or more previously transmitted reference signal resources having an associated direction flag indicating a same direction as the one or more reflection directions.
[0237] Clause 66. The network node of any of clauses 64 to 65, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is positive, and the sensing result report does not include reflection directions of the one or more reference signal resources.
[0238] Clause 67. The network node of any of clauses 64 to 65, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is positive, the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and based on the sensing result only including reflection directions of the one or more reference signal resources, the sensing result report indicates that the H-RIS failed to sense the DOA of the one or more reference signal resources.
[0239] Clause 68. The network node of any of clauses 64 to 65, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is negative, and the sensing result report includes reflection directions of the one or more reference signal resources.
[0240] Clause 69. The network node of any of clauses 64 to 65 and 68, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is negative, the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and based on the sensing result only including reflection directions of the one or more reference signal resources, the sensing result report indicates that the H-RIS successfully sensed the DOA of the one or more reference signal resources.
[0241] Clause 70. The network node of any of clauses 64 to 65, wherein: the one or more sensing directions do not overlap with the one or more reflection directions, and the exclusion flag is invalid.
[0242] Clause 71. The network node of any of clauses 64 to 70, wherein each of the one or more sensing directions is indicated as a start angle and an end angle.
[0243] Clause 72. The network node of any of clauses 57 to 71, further comprising: means for receiving, from the H-RIS, a capability message indicating whether the H-RIS is capable of performing simultaneous reflection and sensing.
[0244] Clause 73. The network node of any of clauses 57 to 72, wherein: the network node is a base station, the at least one second network node is at least one user equipment (UE) , and the one or more reference signal resources are one or more sounding reference signal (SRS) resources.
[0245] Clause 74. A hybrid reconfigurable intelligent surface (H-RIS) , comprising: means for receiving, from a network node, a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; means for receiving, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and means for transmitting, to the network node, a sensing result report indicating the type of the sensing result.
[0246] Clause 75. The H-RIS of clause 74, further comprising: means for determining the one or more values of the DOA measurements based on a phase difference between two sensing elements in a horizontal direction or a vertical direction.
[0247] Clause 76. The H-RIS of any of clauses 74 to 75, wherein the reference signal configuration further indicates identifiers of one or more previously transmitted reference signal resources and associated direction flags, wherein each direction flag configures the H-RIS to use a DoA value derived based on a previously transmitted reference signal resource as an incident direction or an outgoing direction for a reflection.
[0248] Clause 77. The H-RIS of clause 76, further comprising: means for transmitting in a same direction as the one or more previously transmitted reference signal resources based on the identifiers of the one or more previously transmitted reference signal resources and the associated direction flags.
[0249] Clause 78. The H-RIS of clause 77, wherein, based on the one or more reference signal resources consisting of a single reference signal resource, the single reference signal resource is transmitted using all reflective meta-elements of the H-RIS.
[0250] Clause 79. The H-RIS of any of clauses 77 to 78, wherein, based on the one or more reference signal resources comprising a plurality of reference signal resources, each of the plurality of reference signal resources is transmitted using a sub-group of reflective meta-elements of the H-RIS.
[0251] Clause 80. The H-RIS of any of clauses 76 to 79, wherein: the one or more reference signal resources are configured for both sensing and reflection by the H-RIS, and the reference signal configuration further indicates one or more reflection directions associated with the one or more reference signal resources, one or more sensing directions associated with the one or more reference signal resources, and an exclusion flag.
[0252] Clause 81. The H-RIS of clause 80, wherein the reference signal configuration indicates the one or more reflection directions to enable the H-RIS to mitigate interference in processing the one or more reference signal resources in the one or more sensing directions and to exclude the one or more reflection directions from the sensing result report.
[0253] Clause 82. The H-RIS of any of clauses 80 to 81, further comprising: means for generating reflection coefficients that reduce reflection beamforming gain from the one or more sensing directions to the one or more reflection directions.
[0254] Clause 83. The H-RIS of any of clauses 76 to 82, wherein: the one or more reflection directions are based on DOA measurements of the one or more previously transmitted reference signal resources having an associated direction flag indicating a same direction as the one or more reflection directions.
[0255] Clause 84. The H-RIS of any of clauses 74 to 83, further comprising: means for transmitting, to the network node, a capability message indicating whether the H-RIS is capable of performing simultaneous reflection and sensing.
[0256] Clause 85. A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a network node, cause the network node to: transmit, to a hybrid reconfigurable intelligent surface (H-RIS) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; transmit, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and receive, from the H-RIS, a sensing result report indicating the type of the sensing result.
[0257] Clause 86. The non-transitory computer-readable medium of clause 85, wherein: the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and the indication comprises a flag indicating that the H-RIS successfully sensed the DOA of the one or more reference signal resources or that the H-RIS failed to sense the DOA of the one or more reference signal resources.
[0258] Clause 87. The non-transitory computer-readable medium of clause 85, wherein: the type of the sensing result comprises the number of DOA measurements, and the number of DOA measurements corresponds to a number of multipaths of the one or more reference signal resources, a number of multiple second network nodes transmitting the one or more reference signal resources, or both.
[0259] Clause 88. The non-transitory computer-readable medium of clause 85, wherein: the type of the sensing result comprises the one or more values of the DOA measurements, and the non-transitory computer-readable medium further comprises computer-executable instructions that, when executed by the network node, cause the network node to transmit, to the H-RIS, reflection coefficients for the H-RIS based on the one or more values of the DOA measurements.
[0260] Clause 89. The non-transitory computer-readable medium of clause 88, wherein each of the one or more values of the DOA measurements comprises: a horizontal angle and a vertical angle, or an elevation angle and an azimuth angle.
[0261] Clause 90. The non-transitory computer-readable medium of any of clauses 85 to 89, wherein the reference signal configuration further indicates identifiers of one or more previously transmitted reference signal resources and associated direction flags.
[0262] Clause 91. The non-transitory computer-readable medium of clause 90, wherein: the identifiers of the one or more previously transmitted reference signal resources and the associated direction flags configure the H-RIS to transmit in a same direction as the one or more previously transmitted reference signal resources, and each direction flag configures the H-RIS to use a DoA value derived based on a previously transmitted reference signal resource as an incident direction or an outgoing direction for a reflection.
[0263] Clause 92. The non-transitory computer-readable medium of any of clauses 90 to 91, wherein: the one or more reference signal resources are configured for both sensing and reflection by the H-RIS, and the reference signal configuration further indicates one or more reflection directions associated with the one or more reference signal resources, one or more sensing directions associated with the one or more reference signal resources, and an exclusion flag.
[0264] Clause 93. The non-transitory computer-readable medium of clause 92, wherein the one or more reflection directions are based on DOA measurements of the one or more previously transmitted reference signal resources having an associated direction flag indicating a same direction as the one or more reflection directions.
[0265] Clause 94. The non-transitory computer-readable medium of any of clauses 92 to 93, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is positive, and the sensing result report does not include reflection directions of the one or more reference signal resources.
[0266] Clause 95. The non-transitory computer-readable medium of any of clauses 92 to 93, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is positive, the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and based on the sensing result only including reflection directions of the one or more reference signal resources, the sensing result report indicates that the H-RIS failed to sense the DOA of the one or more reference signal resources.
[0267] Clause 96. The non-transitory computer-readable medium of any of clauses 92 to 93, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is negative, and the sensing result report includes reflection directions of the one or more reference signal resources.
[0268] Clause 97. The non-transitory computer-readable medium of any of clauses 92 to 93 and 96, wherein: the one or more sensing directions overlap with the one or more reflection directions, the exclusion flag is negative, the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, and based on the sensing result only including reflection directions of the one or more reference signal resources, the sensing result report indicates that the H-RIS successfully sensed the DOA of the one or more reference signal resources.
[0269] Clause 98. The non-transitory computer-readable medium of any of clauses 92 to 93, wherein: the one or more sensing directions do not overlap with the one or more reflection directions, and the exclusion flag is invalid.
[0270] Clause 99. The non-transitory computer-readable medium of any of clauses 92 to 98, wherein each of the one or more sensing directions is indicated as a start angle and an end angle.
[0271] Clause 100. The non-transitory computer-readable medium of any of clauses 85 to 99, further comprising computer-executable instructions that, when executed by the network node, cause the network node to: receive, from the H-RIS, a capability message indicating whether the H-RIS is capable of performing simultaneous reflection and sensing.
[0272] Clause 101. The non-transitory computer-readable medium of any of clauses 85 to 100, wherein: the network node is a base station, the at least one second network node is at least one user equipment (UE) , and the one or more reference signal resources are one or more sounding reference signal (SRS) resources.
[0273] Clause 102. A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a hybrid reconfigurable intelligent surface (H-RIS) , cause the H-RIS to: receive, from a network node, a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node; receive, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; and transmit, to the network node, a sensing result report indicating the type of the sensing result.
[0274] Clause 103. The non-transitory computer-readable medium of clause 102, further comprising computer-executable instructions that, when executed by the H-RIS, cause the H-RIS to: determine the one or more values of the DOA measurements based on a phase difference between two sensing elements in a horizontal direction or a vertical direction.
[0275] Clause 104. The non-transitory computer-readable medium of any of clauses 102 to 103, wherein the reference signal configuration further indicates identifiers of one or more previously transmitted reference signal resources and associated direction flags, wherein each direction flag configures the H-RIS to use a DoA value derived based on a previously transmitted reference signal resource as an incident direction or an outgoing direction for a reflection.
[0276] Clause 105. The non-transitory computer-readable medium of clause 104, further comprising computer-executable instructions that, when executed by the H-RIS, cause the H-RIS to: transmit in a same direction as the one or more previously transmitted reference signal resources based on the identifiers of the one or more previously transmitted reference signal resources and the associated direction flags.
[0277] Clause 106. The non-transitory computer-readable medium of clause 105, wherein, based on the one or more reference signal resources consisting of a single reference signal resource, the single reference signal resource is transmitted using all reflective meta-elements of the H-RIS.
[0278] Clause 107. The non-transitory computer-readable medium of any of clauses 105 to 106, wherein, based on the one or more reference signal resources comprising a plurality of reference signal resources, each of the plurality of reference signal resources is transmitted using a sub-group of reflective meta-elements of the H-RIS.
[0279] Clause 108. The non-transitory computer-readable medium of any of clauses 104 to 107, wherein: the one or more reference signal resources are configured for both sensing and reflection by the H-RIS, and the reference signal configuration further indicates one or more reflection directions associated with the one or more reference signal resources, one or more sensing directions associated with the one or more reference signal resources, and an exclusion flag.
[0280] Clause 109. The non-transitory computer-readable medium of clause 108, wherein the reference signal configuration indicates the one or more reflection directions to enable the H-RIS to mitigate interference in processing the one or more reference signal resources in the one or more sensing directions and to exclude the one or more reflection directions from the sensing result report.
[0281] Clause 110. The non-transitory computer-readable medium of any of clauses 108 to 109, further comprising computer-executable instructions that, when executed by the H-RIS, cause the H-RIS to: generate reflection coefficients that reduce reflection beamforming gain from the one or more sensing directions to the one or more reflection directions.
[0282] Clause 111. The non-transitory computer-readable medium of any of clauses 104 to 110, wherein: the one or more reflection directions are based on DOA measurements of the one or more previously transmitted reference signal resources having an associated direction flag indicating a same direction as the one or more reflection directions.
[0283] Clause 112. The non-transitory computer-readable medium of any of clauses 102 to 111, further comprising computer-executable instructions that, when executed by the H-RIS, cause the H-RIS to: transmit, to the network node, a capability message indicating whether the H-RIS is capable of performing simultaneous reflection and sensing.
[0284] Those of skill in the art will appreciate that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0285] Further, those of skill in the art will appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the aspects disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
[0286] The various illustrative logical blocks, modules, and circuits described in connection with the aspects disclosed herein may be implemented or performed with a general purpose processor, a digital signal processor (DSP) , an ASIC, a field-programable gate array (FPGA) , or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
[0287] The methods, sequences and / or algorithms described in connection with the aspects disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in random access memory (RAM) , flash memory, read-only memory (ROM) , erasable programmable ROM (EPROM) , electrically erasable programmable ROM (EEPROM) , registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An example storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal (e.g., UE) . In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
[0288] In one or more example aspects, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
[0289] While the foregoing disclosure shows illustrative aspects of the disclosure, it should be noted that various changes and modifications could be made herein without departing from the scope of the disclosure as defined by the appended claims. For example, the functions, steps and / or actions of the method claims in accordance with the aspects of the disclosure described herein need not be performed in any particular order. Further, no component, function, action, or instruction described or claimed herein should be construed as critical or essential unless explicitly described as such. Furthermore, as used herein, the terms “set, ” “group, ” and the like are intended to include one or more of the stated elements. Also, as used herein, the terms “has, ” “have, ” “having, ” “comprises, ” “comprising, ” “includes, ” “including, ” and the like does not preclude the presence of one or more additional elements (e.g., an element “having” A may also have B) . Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or, ” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of” ) or the alternatives are mutually exclusive (e.g., “one or more” should not be interpreted as “one and more” ) . Furthermore, although components, functions, actions, and instructions may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated. Accordingly, as used herein, the articles “a, ” “an, ” “the, ” and “said” are intended to include one or more of the stated elements. Additionally, as used herein, the terms “at least one” and “one or more” encompass “one” component, function, action, or instruction performing or capable of performing a described or claimed functionality and also “two or more” components, functions, actions, or instructions performing or capable of performing a described or claimed functionality in combination.
Claims
1.A method of wireless communication performed by a network node, comprising:transmitting, to a hybrid reconfigurable intelligent surface (H-RIS) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node;transmitting, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; andreceiving, from the H-RIS, a sensing result report indicating the type of the sensing result.2.The method of claim 1, wherein:the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, andthe indication comprises a flag indicating that the H-RIS successfully sensed the DOA of the one or more reference signal resources or that the H-RIS failed to sense the DOA of the one or more reference signal resources.3.The method of claim 1, wherein:the type of the sensing result comprises the number of DOA measurements, andthe number of DOA measurements corresponds to a number of multipaths of the one or more reference signal resources, a number of multiple second network nodes transmitting the one or more reference signal resources, or both.4.The method of claim 1, wherein:the type of the sensing result comprises the one or more values of the DOA measurements, andthe method further comprises:transmitting, to the H-RIS, reflection coefficients for the H-RIS based on the one or more values of the DOA measurements.5.The method of claim 4, wherein each of the one or more values of the DOA measurements comprises:a horizontal angle and a vertical angle, oran elevation angle and an azimuth angle.6.The method of claim 1, wherein the reference signal configuration further indicates identifiers of one or more previously transmitted reference signal resources and associated direction flags.7.The method of claim 6, wherein:the identifiers of the one or more previously transmitted reference signal resources and the associated direction flags configure the H-RIS to transmit in a same direction as the one or more previously transmitted reference signal resources, andeach direction flag configures the H-RIS to use a DoA value derived based on a previously transmitted reference signal resource as an incident direction or an outgoing direction for a reflection.8.The method of claim 6, wherein:the one or more reference signal resources are configured for both sensing and reflection by the H-RIS, andthe reference signal configuration further indicates one or more reflection directions associated with the one or more reference signal resources, one or more sensing directions associated with the one or more reference signal resources, and an exclusion flag.9.The method of claim 8, wherein the one or more reflection directions are based on DOA measurements of the one or more previously transmitted reference signal resources having an associated direction flag indicating a same direction as the one or more reflection directions.10.The method of claim 8, wherein:the one or more sensing directions overlap with the one or more reflection directions,the exclusion flag is positive, andthe sensing result report does not include reflection directions of the one or more reference signal resources.11.The method of claim 8, wherein:the one or more sensing directions overlap with the one or more reflection directions,the exclusion flag is positive,the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, andbased on the sensing result only including reflection directions of the one or more reference signal resources, the sensing result report indicates that the H-RIS failed to sense the DOA of the one or more reference signal resources.12.The method of claim 8, wherein:the one or more sensing directions overlap with the one or more reflection directions,the exclusion flag is negative, andthe sensing result report includes reflection directions of the one or more reference signal resources.13.The method of claim 8, wherein:the one or more sensing directions overlap with the one or more reflection directions,the exclusion flag is negative,the type of the sensing result comprises the indication of whether the H-RIS successfully sensed the DOA of the one or more reference signal resources, andbased on the sensing result only including reflection directions of the one or more reference signal resources, the sensing result report indicates that the H-RIS successfully sensed the DOA of the one or more reference signal resources.14.The method of claim 8, wherein:the one or more sensing directions do not overlap with the one or more reflection directions, andthe exclusion flag is invalid.15.The method of claim 8, wherein each of the one or more sensing directions is indicated as a start angle and an end angle.16.The method of claim 1, further comprising:receiving, from the H-RIS, a capability message indicating whether the H-RIS is capable of performing simultaneous reflection and sensing.17.The method of claim 1, wherein:the network node is a base station,the at least one second network node is at least one user equipment (UE) , andthe one or more reference signal resources are one or more sounding reference signal (SRS) resources.18.A method of wireless communication performed by a hybrid reconfigurable intelligent surface (H-RIS) , comprising:receiving, from a network node, a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node;receiving, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; andtransmitting, to the network node, a sensing result report indicating the type of the sensing result.19.The method of claim 18, further comprising:determining the one or more values of the DOA measurements based on a phase difference between two sensing elements in a horizontal direction or a vertical direction.20.The method of claim 18, wherein the reference signal configuration further indicates identifiers of one or more previously transmitted reference signal resources and associated direction flags, wherein each direction flag configures the H-RIS to use a DoA value derived based on a previously transmitted reference signal resource as an incident direction or an outgoing direction for a reflection.21.The method of claim 20, further comprising:transmitting in a same direction as the one or more previously transmitted reference signal resources based on the identifiers of the one or more previously transmitted reference signal resources and the associated direction flags.22.The method of claim 21, wherein, based on the one or more reference signal resources consisting of a single reference signal resource, the single reference signal resource is transmitted using all reflective meta-elements of the H-RIS.23.The method of claim 21, wherein, based on the one or more reference signal resources comprising a plurality of reference signal resources, each of the plurality of reference signal resources is transmitted using a sub-group of reflective meta-elements of the H-RIS.24.The method of claim 20, wherein:the one or more reference signal resources are configured for both sensing and reflection by the H-RIS, andthe reference signal configuration further indicates one or more reflection directions associated with the one or more reference signal resources, one or more sensing directions associated with the one or more reference signal resources, and an exclusion flag.25.The method of claim 24, wherein the reference signal configuration indicates the one or more reflection directions to enable the H-RIS to mitigate interference in processing the one or more reference signal resources in the one or more sensing directions and to exclude the one or more reflection directions from the sensing result report.26.The method of claim 24, further comprising:generating reflection coefficients that reduce reflection beamforming gain from the one or more sensing directions to the one or more reflection directions.27.The method of claim 20, wherein:the one or more reflection directions are based on DOA measurements of the one or more previously transmitted reference signal resources having an associated direction flag indicating a same direction as the one or more reflection directions.28.The method of claim 18, further comprising:transmitting, to the network node, a capability message indicating whether the H-RIS is capable of performing simultaneous reflection and sensing.29.A network node, comprising:one or more memories;one or more transceivers; andone or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to:transmit, via the one or more transceivers, to a hybrid reconfigurable intelligent surface (H-RIS) , a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node;transmit, via the one or more transceivers, to the H-RIS, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; andreceive, via the one or more transceivers, from the H-RIS, a sensing result report indicating the type of the sensing result.30.A hybrid reconfigurable intelligent surface (H-RIS) , comprising:one or more memories;one or more transceivers; andone or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to:receive, via the one or more transceivers, from a network node, a reference signal configuration indicating one or more reference signal resources transmitted by at least one second network node;receive, via the one or more transceivers, from the network node, a sensing report configuration indicating a type of a sensing result to be reported by the H-RIS, wherein the type of the sensing result comprises (1) an indication of whether the H-RIS successfully sensed a direction of arrival (DOA) of the one or more reference signal resources, (2) a number of DOA measurements obtained by the H-RIS of the one or more reference signal resources, or (3) one or more values of the DOA measurements; andtransmit, via the one or more transceivers, to the network node, a sensing result report indicating the type of the sensing result.