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WO2025136949A1 - Procédés et appareils de localisation assistée par ris - Google Patents

Procédés et appareils de localisation assistée par ris Download PDF

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Publication number
WO2025136949A1
WO2025136949A1 PCT/US2024/060522 US2024060522W WO2025136949A1 WO 2025136949 A1 WO2025136949 A1 WO 2025136949A1 US 2024060522 W US2024060522 W US 2024060522W WO 2025136949 A1 WO2025136949 A1 WO 2025136949A1
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WO
WIPO (PCT)
Prior art keywords
ris
wtru
localization
base station
information
Prior art date
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PCT/US2024/060522
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English (en)
Inventor
Ibrahim HEMADEH
Arman SHOJAEIFARD
Afshin Haghighat
Remun KOIRALA
Patrick Svedman
Javier LORCA HERNANDO
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InterDigital Patent Holdings Inc
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InterDigital Patent Holdings Inc
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Publication date
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Publication of WO2025136949A1 publication Critical patent/WO2025136949A1/fr
Pending legal-status Critical Current
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/145—Passive relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/04013—Intelligent reflective surfaces
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Definitions

  • the methods include receiving, from a base station, first information; decoding the first information to detect one or more reflective intelligent surfaces (RISs); transmitting a request for second information regarding the RISs; receiving the second information from the base station; identifying one or more of the RISs for localization of the WTRU based on the second information; transmitting to the base station an indication of the identified one or more RISs; receiving configuration information of one or more reference signals for localization; based on the configuration information, receiving a reference signal for localization; performing a localization based on the reference signal; and transmitting a localization report based on the localization to the base station.
  • RISs reflective intelligent surfaces
  • the first information comprises at least one of: RIS identification, RIS coordinates, RIS types, RIS operating mode, RIS minimum power threshold and RIS association with a base station
  • the request for second information includes at least one of: time domain availability of the RIS; frequency domain availability of the RIS; propagation delay between the RIS and the base station; geo-location information of the RIS and base station; or downlink reference signals and associated transmission configuration indication (TCI) states and quasi co-location information (QCI) for identification of the RIS.
  • TCI transmission configuration indication
  • QCI quasi co-location information
  • the indication of the identification of the RIS to the base station is made via MAC-CE or PUSCH.
  • the received configuration includes one or more of: PRS resource sets, PRS resources, time, frequency resources, comb offset or resource block offset.
  • the localization includes determining a delay between the WTRU and the base station based on at least one of: time of arrival, angle of arrival, reference signal received power, orientation and relative position to source nodes.
  • the localization report includes at least one of: an estimated location of the WTRU relative to the base station, an estimated delay between the WTRU and the base station; received RS resource identification and corresponding measurement, measured metrics of an RIS-aided path between the WTRU and the base station; a preferred source node combination; and a preferred set of RIS.
  • An apparatus e.g., a WTRU configured to perform any of the above methods is also described.
  • FIG. 1A is a system diagram illustrating an example communications system in which one or more disclosed embodiments may be implemented
  • FIG. 1 B is a system diagram illustrating an example wireless transmit/receive unit (WTRU) that may be used within the communications system illustrated in FIG 1A according to an embodiment;
  • WTRU wireless transmit/receive unit
  • FIG. 1C is a system diagram illustrating an example radio access network (RAN) and an example core network (ON) that may be used within the communications system illustrated in FIG. 1A according to an embodiment;
  • RAN radio access network
  • ON core network
  • FIG. 1D is a system diagram illustrating a further example RAN and a further example ON that may be used within the communications system illustrated in FIG 1A according to an embodiment
  • the processor 118 may also be coupled to the GPS chipset 136, which may be configured to provide location information (e.g., longitude and latitude) regarding the current location of the WTRU 102.
  • location information e.g., longitude and latitude
  • the WTRU 102 may receive location information over the air interface 116 from a base station (e.g., base stations 114a, 114b) and/or determine its location based on the timing of the signals being received from two or more nearby base stations. It will be appreciated that the WTRU 102 may acquire location information by way of any suitable location-determination method while remaining consistent with an embodiment
  • the WTRU 102 may include a full duplex radio for which transmission and reception of some or all of the signals (e g., associated with particular subframes for both the UL (e.g., for transmission) and DL (e.g., for reception) may be concurrent and/or simultaneous.
  • the full duplex radio may include an interference management unit to reduce and or substantially eliminate self-interference via either hardware (e.g., a choke) or signal processing via a processor (e.g., a separate processor (not shown) or via processor 118).
  • the CN 106 shown in FIG. 1C may include a mobility management entity (MME) 162, a serving gateway (SGW) 164, and a packet data network (PDN) gateway (PGW) 166. While the foregoing elements are depicted as part of the CN 106, it will be appreciated that any of these elements may be owned and/or operated by an entity other than the CN operator.
  • MME mobility management entity
  • SGW serving gateway
  • PGW packet data network gateway
  • PGW packet data network gateway
  • the CN 106 may facilitate communications with other networks
  • the CN 106 may provide the WTRUs 102a, 102b, 102c with access to circuit-switched networks, such as the PSTN 108, to facilitate communications between the WTRUs 102a, 102b, 102c and traditional land-line communications devices.
  • the CN 106 may include, or may communicate with, an IP gateway (e.g., an IP multimedia subsystem (IMS) server) that serves as an interface between the CN 106 and the PSTN 108.
  • IMS IP multimedia subsystem
  • the CN 106 may provide the WTRUs 102a, 102b, 102c with access to the other networks 112, which may include other wired and/or wireless networks that are owned and/or operated by other service providers.
  • the WTRU is described in FIGS. 1A-1 D as a wireless terminal, it is contemplated that in certain representative embodiments that such a terminal may use (e.g., temporarily or permanently) wired communication interfaces with the communication network.
  • the other network 112 may be a WLAN.
  • a WLAN in Infrastructure Basic Service Set (BSS) mode may have an Access Point (AP) for the BSS and one or more stations (STAs) associated with the AP.
  • the AP may have access or an interface to a Distribution System (DS) or another type of wired/wireless network that carries traffic in to and/or out of the BSS.
  • Traffic to STAs that originates from outside the BSS may arrive through the AP and may be delivered to the STAs.
  • Traffic originating from STAs to destinations outside the BSS may be sent to the AP to be delivered to respective destinations.
  • DS Distribution System
  • Traffic between STAs within the BSS may be sent through the AP, for example, where the source STA may send traffic to the AP and the AP may deliver the traffic to the destination STA
  • the traffic between STAs within a BSS may be considered and/or referred to as peer-to-peer traffic.
  • the peer-to- peer traffic may be sent between (e.g., directly between) the source and destination STAs with a direct link setup (DLS).
  • the DLS may use an 802.11e DLS or an 802.11z tunneled DLS (TDLS).
  • a WLAN using an Independent BSS (IBSS) mode may not have an AP, and the STAs (e.g., all of the STAs) within or using the IBSS may communicate directly with each other.
  • the IBSS mode of communication may sometimes be referred to herein as an “ad-hoc” mode of communication.
  • the AP may transmit a beacon on a fixed channel, such as a primary channel.
  • the primary channel may be a fixed width (e.g., 20 MHz wide bandwidth) or a dynamically set width.
  • the primary channel may be the operating channel of the BSS and may be used by the STAs to establish a connection with the AP.
  • Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) may be implemented, for example in 802.11 systems.
  • the STAs e.g., every STA, including the AP, may sense the primary channel. If the primary channel is sensed/detected and/or determined to be busy by a particular STA, the particular STA may back off.
  • One STA (e.g., only one station) may transmit at any given time in a given BSS.
  • High Throughput (HT) STAs may use a 40 MHz wide channel for communication, for example, via a combination of the primary 20 MHz channel with an adjacent or nonadjacent 20 MHz channel to form a 40 MHz wide channel.
  • VHT STAs may support 20MHz, 40 MHz, 80 MHz, and/or 160 MHz wide channels
  • the 40 MHz, and/or 80 MHz, channels may be formed by combining contiguous 20 MHz channels.
  • a 160 MHz channel may be formed by combining 8 contiguous 20 MHz channels, or by combining two noncontiguous 80 MHz channels, which may be referred to as an 80+80 configuration.
  • the data, after channel encoding may be passed through a segment parser that may divide the data into two streams.
  • IFFT Inverse Fast Fourier Transform
  • time domain processing may be done on each stream separately
  • the streams may be mapped on to the two 80 MHz channels, and the data may be transmitted by a transmitting STA.
  • the above described operation for the 80+80 configuration may be reversed, and the combined data may be sent to the Medium Access Control (MAC).
  • MAC Medium Access Control
  • Sub 1 GHz modes of operation are supported by 802.11 af and 802.11 ah.
  • the channel operating bandwidths, and carriers, are reduced in 802.11 af and 802.11ah relative to those used in 802.11n, and 802.11ac.
  • 802.11 af supports 5 MHz, 10 MHz, and 20 MHz bandwidths in the TV White Space (TVWS) spectrum
  • 802.11 ah supports 1 MHz, 2 MHz, 4 MHz, 8 MHz, and 16 MHz bandwidths using non-TVWS spectrum.
  • 802.11 ah may support Meter Type Control/Machine- Type Communications (MTC), such as MTC devices in a macro coverage area.
  • MTC devices may have certain capabilities, for example, limited capabilities including support for (e.g. , only support for) certain and/or limited bandwidths
  • the MTC devices may include a battery with a battery life above a threshold (e.g., to maintain a very long battery life).
  • WLAN systems which may support multiple channels, and channel bandwidths, such as 802 11 n, 802.11ac, 802.11 af, and 802.11 ah, include a channel which may be designated as the primary channel.
  • the primary channel may have a bandwidth equal to the largest common operating bandwidth supported by all STAs in the BSS.
  • the bandwidth of the primary channel may be set and/or limited by a STA, from among all STAs in operating in a BSS, which supports the smallest bandwidth operating mode.
  • the primary channel may be 1 MHz wide for STAs (e.g., MTC type devices) that support (e.g., only support) a 1 MHz mode, even if the AP, and other STAs in the BSS support 2 MHz, 4 MHz, 8 MHz, 16 MHz, and/or other channel bandwidth operating modes.
  • Carrier sensing and/or Network Allocation Vector (NAV) settings may depend on the status of the primary channel. If the primary channel is busy, for example, due to a STA (which supports only a 1 MHz operating mode) transmitting to the AP, all available frequency bands may be considered busy even though a majority of the available frequency bands remains idle.
  • STAs e.g., MTC type devices
  • NAV Network Allocation Vector
  • the available frequency bands which may be used by 802.11 ah, are from 902 MHz to 928 MHz. In Korea, the available frequency bands are from 917.5 MHz to 923.5 MHz. In Japan, the available frequency bands are from 916.5 MHz to 927.5 MHz. The total bandwidth available for 802.11 ah is 6 MHz to 26 MHz depending on the country code.
  • the RAN 104 may include gNBs 180a, 180b, 180c, though it will be appreciated that the RAN 104 may include any number of gNBs while remaining consistent with an embodiment.
  • the gNBs 180a, 180b, 180c may each include one or more transceivers for communicating with the WTRUs 102a, 102b, 102c over the air interface 116.
  • the gNBs 180a, 180b, 180c may implement MIMO technology.
  • gNBs 180a, 108b may utilize beamforming to transmit signals to and/or receive signals from the gNBs 180a, 180b, 180c.
  • the gNB 180a may use multiple antennas to transmit wireless signals to, and/or receive wireless signals from, the WTRU 102a.
  • the gNBs 180a, 180b, 180c may implement carrier aggregation technology.
  • the gNB 180a may transmit multiple component carriers to the WTRU 102a (not shown). A subset of these component carriers may be on unlicensed spectrum while the remaining component carriers may be on licensed spectrum.
  • the gNBs 180a, 180b, 180c may implement Coordinated Multi-Point (CoMP) technology.
  • WTRU 102a may receive coordinated transmissions from gNB 180a and gNB 180b (and/or gNB 180c).
  • CoMP Coordinated Multi-Point
  • the WTRUs 102a, 102b, 102c may communicate with gNBs 180a, 180b, 180c using transmissions associated with a scalable numerology. For example, the OFDM symbol spacing and/or OFDM subcarrier spacing may vary for different transmissions, different cells, and/or different portions of the wireless transmission spectrum.
  • the WTRUs 102a, 102b, 102c may communicate with gNBs 180a, 180b, 180c using subframe or transmission time intervals (TTIs) of various or scalable lengths (e.g., containing a varying number of OFDM symbols and/or lasting varying lengths of absolute time).
  • TTIs subframe or transmission time intervals
  • the gNBs 180a, 180b, 180c may be configured to communicate with the WTRUs 102a, 102b, 102c in a standalone configuration and/or a non-standalone configuration.
  • WTRUs 102a, 102b, 102c may communicate with gNBs 180a, 180b, 180c without also accessing other RANs (e.g., such as eNode-Bs 160a, 160b, 160c).
  • WTRUs 102a, 102b, 102c may utilize one or more of gNBs 180a, 180b, 180c as a mobility anchor point.
  • WTRUs 102a, 102b, 102c may communicate with gNBs 180a, 180b, 180c using signals in an unlicensed band.
  • WTRUs 102a, 102b, 102c may communicate with/connect to gNBs 180a, 180b, 180c while also communicating with/connecting to another RAN such as eNode-Bs 160a, 160b, 160c.
  • WTRUs 102a, 102b, 102c may implement DC principles to communicate with one or more gNBs 180a, 180b, 180c and one or more eNode-Bs 160a, 160b, 160c substantially simultaneously.
  • eNode-Bs 160a, 160b, 160c may serve as a mobility anchor for WTRUs 102a, 102b, 102c and gNBs 180a, 180b, 180c may provide additional coverage and/or throughput for servicing WTRUs 102a, 102b, 102c.
  • Each of the gNBs 180a, 180b, 180c may be associated with a particular cell (not shown) and may be configured to handle radio resource management decisions, handover decisions, scheduling of users in the UL and/or DL, support of network slicing, DC, interworking between NR and E-UTRA, routing of user plane data towards User Plane Function (UPF) 184a, 184b, routing of control plane information towards Access and Mobility Management Function (AMF) 182a, 182b and the like. As shown in FIG. 1D, the gNBs 180a, 180b, 180c may communicate with one another over an Xn interface.
  • UPF User Plane Function
  • AMF Access and Mobility Management Function
  • the CN 106 shown in FIG. 1 D may include at least one AMF 182a, 182b, at least one UPF 184a, 184b, at least one Session Management Function (SMF) 183a, 183b, and possibly a Data Network (DN) 185a, 185b. While the foregoing elements are depicted as part of the CN 106, it will be appreciated that any of these elements may be owned and/or operated by an entity other than the CN operator.
  • SMF Session Management Function
  • the AMF 182a, 182b may be connected to one or more of the gNBs 180a, 180b, 180c in the RAN 104 via an N2 interface and may serve as a control node.
  • the AMF 182a, 182b may be responsible for authenticating users of the WTRUs 102a, 102b, 102c, support for network slicing (e.g., handling of different protocol data unit (PDU) sessions with different requirements), selecting a particular SMF 183a, 183b, management of the registration area, termination of non-access stratum (NAS) signaling, mobility management, and the like.
  • PDU protocol data unit
  • Network slicing may be used by the AMF 182a, 182b in order to customize CN support for WTRUs 102a, 102b, 102c based on the types of services being utilized WTRUs 102a, 102b, 102c.
  • the AMF 182a, 182b may provide a control plane function for switching between the RAN 104 and other RANs (not shown) that employ other radio technologies, such as LTE, LTE-A, LTE-A Pro, and/or non-3GPP access technologies such as WiFi.
  • the SMF 183a, 183b may be connected to an AMF 182a, 182b in the CN 106 via an N11 interface.
  • the SMF 183a, 183b may also be connected to a UPF 184a, 184b in the CN 106 via an N4 interface.
  • the SMF 183a, 183b may select and control the UPF 184a, 184b and configure the routing of traffic through the UPF 184a, 184b.
  • the SMF 183a, 183b may perform other functions, such as managing and allocating UE IP address, managing PDU sessions, controlling policy enforcement and QoS, providing DL data notifications, and the like.
  • a PDU session type may be IP-based, non-IP based, Ethernet-based, and the like.
  • the UPF 184a, 184b may be connected to one or more of the gNBs 180a, 180b, 180c in the RAN 104 via an N3 interface, which may provide the WTRUs 102a, 102b, 102c with access to packet-switched networks, such as the Internet 110, to facilitate communications between the WTRUs 102a, 102b, 102c and IP-enabled devices.
  • the UPF 184, 184b may perform other functions, such as routing and forwarding packets, enforcing user plane policies, supporting multi-homed PDU sessions, handling user plane QoS, buffering DL packets, providing mobility anchoring, and the like.
  • the CN 106 may facilitate communications with other networks
  • the CN 106 may include, or may communicate with, an IP gateway (e.g., an IP multimedia subsystem (IMS) server) that serves as an interface between the CN 106 and the PSTN 108.
  • IP gateway e.g., an IP multimedia subsystem (IMS) server
  • IMS IP multimedia subsystem
  • the emulation devices may be designed to implement one or more tests of other devices in a lab environment and/or in an operator network environment.
  • the one or more emulation devices may perform the one or more, or all, functions while being fully or partially implemented and/or deployed as part of a wired and/or wireless communication network in order to test other devices within the communication network.
  • the one or more emulation devices may perform the one or more, or all, functions while being temporarily implemented/deployed as part of a wired and/or wireless communication network
  • the emulation device may be directly coupled to another device for purposes of testing and/or performing testing using over-the-air wireless communications.
  • the one or more emulation devices may perform the one or more, including all, functions while not being implemented/deployed as part of a wired and/or wireless communication network.
  • the emulation devices may be utilized in a testing scenario in a testing laboratory and/or a non-deployed (e.g., testing) wired and/or wireless communication network in order to implement testing of one or more components.
  • the one or more emulation devices may be test equipment. Direct RF coupling and/or wireless communications via RF circuitry (e.g., which may include one or more antennas) may be used by the emulation devices to transmit and/or receive data.
  • RF circuitry e.g., which may include one or more antennas
  • TRP T ransmission-Reception Point (used interchangeably with GnB)
  • a signature is defined by the set of measurements and configurations that are specific for a topological node.
  • a signature may include Bol, RSRP, location, RIS relative location, pathloss estimate (alpha value), multipath components pattern (e.g. number of components, power profile, delay profile), etc.
  • a RIS signature is dependent on the WTRU location and capabilities and the WTRU may be required to determine the RIS stamp/signature in order to utilize RIS for localization
  • a RIS comprises at least a RIS controller 212 and a RIS panel 200, as shown, for example, in FIG. 2.
  • a RIS panel 200 comprises of a group of elements 210, which have the capability to change at least one of the properties of incident radio waves including frequency, amplitude, phase and polarization
  • the radio wave can be at least reflected or transmitted to another direction by the RIS panel, depending on the design of RIS.
  • the RIS micro-controller refers to a component of a RIS, responsible for configuring the RIS elements to achieve a desired manipulation of the incident radio wave, potentially processing any signaling received from another network node.
  • the configuration of a RIS element by the micro-controller is conveyed through control signaling from the RIS controller Inside a RIS, one interface is the interface between the RIS micro-controller and RIS panel to transmit the control signals.
  • Described herein are systems and methods for a WTRU to utilize topological nodes in the environment (e.g. RISs) to perform localization with a reduced number of required TRPs/cells.
  • topological nodes in the environment e.g. RISs
  • the WTRU may receive a second information and based on one or more of information elements in the second information, e.g., configured referenced signal and pattern of RIS availability, the WTRU identifies one or more RISs that may be used for localization
  • the WTRU indicates to the serving TRP the identified RIS(s), i.e., a RIS detection report via MAC-CE, PUSCH, and the like.
  • the WTRU receives a RS for localization and proceeds with localization with the aid of the identified RIS.
  • the WTRU may use the activation/deactivation pattern of the RIS to determine the direct link delay between the gNB and the WTRU For example, when the RIS is in a de-activated state a WTRU may estimate the propagation delay using a configured RS. Similarly, when the RIS is in an activated state a WTRU may estimate the propagation delay using the configured RS. Based on the delay the information, a WTRU estimates its position by using the estimated delays, indicated TRP-RIS delay values, and geo-location information of the serving TRP and the available RIS.
  • a process may involve, TDoA, AoA, or other localization methods based on location, velocity, ToA, AoA, RSRP, orientation, relative position to the source nodes, and the like, based on the measurements from the direct and RIS-aided paths.
  • the WTRU sends the RIS-aided localization report to the gNB which may include any or all of the following: a) the WTRU’s estimated location to the gNB; b) the WTRU’s estimated delay values to the gNB to indicate its location information; alternatively, c) a WTRU may only report the difference between the estimated delays; d) received RS resource ID(s) and the corresponding measurements (e.g., received RSRP, AoA, ToA), LoS/NLoS ID per entity, pathloss estimate (alpha value) etc; e) measured metrics of the RIS-aided path, such as strength, AoA, AoD, received RS resource ID(s), received RSRP, Bol, LoS/NLoS ID per entity, pathloss estimate (alpha value), and the like; f) the best source nodes combination for obtaining the position based on a specific threshold, e.g., calculates the dilution of precision (
  • Embodiments described herein enable using topological nodes, including one or more RISs, in assisting for localization.
  • multiple TRPs are required for performing localization. This requires a tight clock synchronization between and phase coherency TRPs.
  • a WTRU may use existing topological nodes to perform localization measurements, which does not require any synchronization between TRPs.
  • a WTRU may receive and decode a network request through RRC signaling to provide capability information.
  • a WTRU may receive and decode the request following the random-access procedure.
  • the WTRU may prepare a capability information message including capability for localization with the aid of RIS(s).
  • the WTRU sends the WTRU capability information message through RRC, e.g., over the PUSCH.
  • WTRU capability information is then used by the network to optimize its configuration and resource allocation for localization.
  • the WTRU may be configured by the network (e.g., gNB, LMF) to perform localization with the aid of a single RIS or multiple RISs using RRC, MAC-CE, or DCI.
  • Localization resources may include one or more of the following: a) a set of RIS(s), e.g., in the form of RIS ID(s); b) a set of TRP(s), e.g., in the form of TRP ID(s); a set of RIS/TRP signature(s); c) a set of reference signals, e.g., in the form of RS resource ID(s), RS resource set I D(s), etc.; and/or d) a set of spatial parameters, such as beams, TCI states, etc., e.g , in the form of TCI state I D(s), ID(s) of source RS(s), etc.
  • a WTRU may determine that a WTRU request for localization resources is to be transmitted. The determination may be based on the WTRU implementation or may be described in a technical specification. In some cases, the determination may be based on a configuration the WTRU has received. In further embodiments, the determination may be based on measurements of configured reference signal(s).
  • a WTRU may have received a configuration comprising a criterion for when to transmit a WTRU request for RIS information.
  • the criterion may comprise a localization accuracy metric.
  • the WTRU may transmit a request for localization resources if the localization accuracy is above a threshold that may be configurable
  • the criterion may comprise a localization change metric.
  • the WTRU may transmit a request for localization resources if the WTRU localization or position has changed by more than a threshold, which may be configurable, since the time the WTRU transmitted the previous WTRU request.
  • a timer may be associated with the criterion that may be started when a WTRU request is transmitted, and the WTRU may be prohibited from transmitting another request until the timer has expired.
  • the WTRU request for localization resources may comprise a request to add a set of localization resources and/or a request to release a set of (previously added) localization resources.
  • the WTRU may determine a set of localization resources that may be used for localization.
  • the WTRU may include the determined set of localization resources in the WTRU request for localization resources.
  • the network may configure one or more candidate sets of localization resources.
  • the WTRU request for localization resources may comprise an indication of one or more candidate sets of localization resources.
  • the WTRU request for localization resources may be transmitted, for example, as an RRC message (e.g., in a PUSCH), a MAC CE (e g., in a PUSCH), a UCI (e.g., in a PUSCH or PUCCH).
  • the WTRU may receive a configuration, activation, and/or, indication.
  • the WTRU may send a request to the network (e.g., LMF, gNB, or other entity that configures reference signals to the WTRU) for DL RS configuration (e.g., DL-PRS configuration) in the uplink physical channels, e.g , PUSCH or PUCCH, via higher layer signaling e.g., MAC-CE or RRC, or via LPP messages.
  • the network e.g., LMF, gNB, or other entity that configures reference signals to the WTRU
  • DL RS configuration e.g., DL-PRS configuration
  • uplink physical channels e.g , PUSCH or PUCCH
  • the first and the second AoA may be measured with respect to a WTRU orientation vector, e.g., a vector perpendicular to the receive antenna panel or any other predefined WTRU surface whose coordinates can also be reported, and may be expressed as, e.g., indexes in a table of predefined directions
  • the WTRU may estimate its location based on the first and second AoA and the geo-location information of TRP and RIS.
  • the WTRU may determine two lines stemming respectively from the TRP and RIS with directions given by the first and second AoAs, respectively, whose intersection may determine the WTRU location.
  • FIG. 7 shows a WTRU 720 in a configuration with a gNB/TRP 710 and four RIS nodes, 731, 732, 733 an 734.

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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des procédés et des appareils pour l'utilisation de surfaces intelligentes réfléchissantes dans des communications sans fil. Les procédés consistent : à recevoir, par une WTRU en provenance d'une station de base, des premières informations et à décoder les premières informations pour déterminer la présence d'une ou de plusieurs surfaces intelligentes réfléchissantes (RIS) ; demander des secondes informations concernant la RIS ; recevoir les secondes informations et identifier une ou plusieurs RIS pour la localisation de la WTRU sur la base des secondes informations ; transmettre à la station de base une indication de la RIS identifiée ; recevoir une configuration d'un ou de plusieurs signaux de référence pour la localisation ; recevoir un signal de référence pour la localisation et procéder à une localisation sur la base du signal de référence ; et transmettre un rapport de localisation à la station de base.
PCT/US2024/060522 2023-12-22 2024-12-17 Procédés et appareils de localisation assistée par ris Pending WO2025136949A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022187761A1 (fr) * 2021-03-01 2022-09-09 Qualcomm Incorporated Indication de capacité d'équipement utilisateur pour positionnement assisté de surface intelligente reconfigurable
US20230308139A1 (en) * 2020-12-24 2023-09-28 Huawei Technologies Co., Ltd. Systems and methods for mimo communication with controllable environments

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230308139A1 (en) * 2020-12-24 2023-09-28 Huawei Technologies Co., Ltd. Systems and methods for mimo communication with controllable environments
WO2022187761A1 (fr) * 2021-03-01 2022-09-09 Qualcomm Incorporated Indication de capacité d'équipement utilisateur pour positionnement assisté de surface intelligente reconfigurable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEN HUI ET AL: "RISs and Sidelink Communications in Smart Cities: The Key to Seamless Localization and Sensing", IEEE COMMUNICATIONS MAGAZINE, IEEE SERVICE CENTER, PISCATAWAY, US, vol. 61, no. 8, 1 August 2023 (2023-08-01), pages 140 - 146, XP011947545, ISSN: 0163-6804, [retrieved on 20230825], DOI: 10.1109/MCOM.001.2200970 *

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