Diseño de señal de referencia de demodulación para comunicación de vehículo a vehículo

    公开(公告)号:ES2816174T3

    公开(公告)日:2021-03-31

    申请号:ES17749325

    申请日:2017-07-28

    Applicant: QUALCOMM INC

    Abstract: Un procedimiento de comunicación inalámbrica de un equipo de usuario, UE, (104, 350, 402, 404), que comprende: determinar una secuencia de señal de referencia de demodulación , DM-RS, base para un canal de control (400) para la comunicación de vehículo a vehículo basada en un índice correspondiente a la secuencia de DM-RS base recibida desde una estación base (102, 180, 310) o basada en un índice preconfigurado correspondiente a la secuencia de DM-RS base; determinar una secuencia de DM-RS basada en la secuencia de DM-RS base y una identidad del UE; y transmitir una pluralidad de símbolos de DM-RS (410, 412, 414, 416, 510, 512, 514, 516) dentro del canal de control (400) en una subtrama usando la secuencia de DM-RS, caracterizado por que cada símbolo de DM-RS usa la misma secuencia de DM-RS.

    Synchronization for device-to-device positioning in wireless networks

    公开(公告)号:AU2016298501B2

    公开(公告)日:2020-01-30

    申请号:AU2016298501

    申请日:2016-06-27

    Applicant: QUALCOMM INC

    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The apparatus may transmit a message in a first subset of a set of resources. The message may include a position of the apparatus and a resource ID indicating at least one symbol in a second subset of the set of resources for transmitting a sequence. The apparatus may transmit the sequence in the at least one symbol in the second subset of the set of resources identified by the resource ID, receive at least one other sequence, adjust a transmission timing based on the received at least one other sequence, and transmit, based on the adjusted transmission timing, the sequence in one or more symbols in a third subset of the set of resources.

    Improvements on co-channel sidelink LTE V2V and DSRC communication

    公开(公告)号:AU2017237734A1

    公开(公告)日:2018-08-30

    申请号:AU2017237734

    申请日:2017-02-27

    Applicant: QUALCOMM INC

    Abstract: Improvement in co-existence of the LTE device-to-device communication with another device-to-device communication method is desired. The apparatus selects a countdown number within a size of a contention window including a plurality of slots before a target subframe. The apparatus determines whether each slot of the plurality of slots is idle or utilized while waiting for the target subframe. The apparatus counts down the countdown number during each of the determined idle slots. The apparatus determines whether the countdown number has reached a threshold number before the target subframe. The apparatus performs, when the countdown number is determined to have reached the threshold number, one of: deferring from transmitting until the target subframe, or transmitting a CUBS until a next subframe or the target subframe.

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