UPLINK AND DOWNLINK BASED BISTATIC AND MULTI-STATIC SENSING

    公开(公告)号:US20240430838A1

    公开(公告)日:2024-12-26

    申请号:US18338655

    申请日:2023-06-21

    Abstract: A technique is performed at a user equipment (UE) for supporting one or more radio frequency (RF) sensing measurements. A reflected downlink signal is received, wherein the reflected downlink signal is transmitted as a downlink signal from a base station and reflected off of a target. An uplink signal is transmitted to be reflected off of the target and received by the base station as a reflected uplink signal. A UE receive-transmit (RX-TX) time difference is determined, representing a difference between a time at which the reflected downlink signal is received by the UE and a time at which the uplink signal is transmitted by the UE. A UE measured frequency offset is determined based on reception of the reflected downlink signal, the UE measured frequency offset comprising a Doppler shift component corresponding to a velocity of the target.

    BUNDLING OF RADIO FREQUENCY SENSING SIGNALS FOR JOINT SENSING AND DATA COMMUNICATION

    公开(公告)号:US20240369678A1

    公开(公告)日:2024-11-07

    申请号:US18690691

    申请日:2022-11-02

    Abstract: Methods, systems, and devices for joint sensing and data communication. A first sensing signal and a second sensing signal are transmitted in sequence, from a transmitter and using the same carrier frequency, for combined processing by a receiver. In some implementations, the sensing signals are radar signals. Data communication during an intervening time period between the first sensing signal and the second sensing signal involves the transmitter sending a data communication signal to another device or vice versa. Phase continuity between the first sensing signal and the second sensing signal can be maintained through performing radio frequency (RF) tuning on the transmitter after the transmitter transmits the data communication signal. The RF tuning may involve storing and restoring an operating state of a power amplifier in the transmitter. Alternatively, phase continuity can be maintained through preventing the transmitter from transmitting over an entirety of the intervening time period.

    DILUTION OF PRECISION (DOP)-BASED SELECTION OF RECONFIGURABLE INTELLIGENT SURFACE (RIS)

    公开(公告)号:US20240329183A1

    公开(公告)日:2024-10-03

    申请号:US18579260

    申请日:2022-05-27

    CPC classification number: G01S5/0273 H04B7/04013

    Abstract: Disclosed are techniques for wireless communication. In an aspect, a network node may determine an estimated location of a user equipment (UE) that is served by a serving base station (BS). The network node may determine a dilution of precision (DOP) requirement with respect to the UE. The network node may determine at least one reconfigurable intelligent surface (RIS) that satisfies the DOP requirement with respect to the UE. The network node may send at least one configuration message to configure the at least one RIS to reflect positioning reference signals to or from the UE. In another aspect, a UE may determine a DOP requirement with respect to the UE. The UE may send at least one configuration message to select at least one RIS that satisfies the DOP requirement with respect to the UE to reflect positioning reference signals to or from the UE.

    RECONFIGURABLE INTELLIGENT SURFACE (RIS) AIDED ROUND-TRIP-TIME (RTT)-BASED USER EQUIPMENT (UE) POSITIONING

    公开(公告)号:US20240319359A1

    公开(公告)日:2024-09-26

    申请号:US18546051

    申请日:2022-01-25

    CPC classification number: G01S13/762 H01Q3/46 H01Q15/148

    Abstract: Disclosed are techniques for positioning. In an aspect, a positioning entity receives a report indicating an operation mode of a reconfigurable intelligent surface (RIS) associated with at least one base station, receives a transmission-to-reception (Tx-Rx) time difference measurement for a network node involved in a round-trip-time (RTT) positioning session with a user equipment (UE), determines a reception-to-transmission (Rx-Tx) time difference measurement for the UE, the Rx-Tx time difference measurement representing a difference between a reception time at the UE of a downlink positioning reference signal from the RIS and a transmission time from the UE of an uplink positioning reference signal towards the RIS, and calculates a distance between the UE and the RIS based, at least in part, on the Tx-Rx time difference measurement and the Rx-Tx time difference measurement.

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