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    Reference signaling for radio access networks
    2.
    发明授权
    Reference signaling for radio access networks 有权

    公开(公告)号：US11616616B2

    公开(公告)日：2023-03-28

    申请号：US17047047

    申请日：2018-04-13

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Karl Werner ,  Lars Lindbom

    IPC分类号： H04L5/00 ,  H04B7/06 ,  H04L1/1829 ,  H04L27/26 ,  H04W72/0446 ,  H04W72/12 ,  H04W72/04

    摘要： There is disclosed a method of operating a signaling radio node in a radio access network, the signaling radio node being adapted for transmitting on a plurality of layers utilizing an antenna arrangement; wherein the method comprises transmitting, on each of the plurality of layers, reference signaling in the same symbol time interval, wherein reference signaling on at least a first layer of the plurality of layers is shifted in time and/or phase relative to reference signaling on at least a second layer of the plurality of layers.
    There are also disclosed related methods and devices.

    Frequency offset estimation
    7.
    发明授权
    Frequency offset estimation 有权

    公开(公告)号：US11133964B2

    公开(公告)日：2021-09-28

    申请号：US16622493

    申请日：2018-06-15

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Per Ernström ,  Håkan Björkegren ,  Mattias Frenne ,  Lars Lindbom

    IPC分类号： H04L5/12 ,  H04L27/00 ,  H04L5/00

    摘要： A radio node (14) is configured to perform frequency offset estimation. The radio node (14) in this regard receives a first set (22-1) of reference symbols of a reference signal during respective time resources, and determines a first frequency offset estimate (26-1) using the first set (22-1) of reference symbols. The radio node (14) also receives a second set (22-2) of 5 reference symbols of the reference signal during respective time resources, e.g., using the same local oscillator frequency for down conversion as with the first set (22-1). The radio node (14) further determines, based on the first frequency offset estimate (26-1), a second frequency offset estimate (26-2) using the second set (22-2) of reference symbols. In some embodiments, the radio node (14) determines a third frequency offset estimate as a sum of the first and 10 second frequency offset estimates, and tunes a local oscillator frequency, or performs frequency offset compensation, based on the third frequency offset estimate.

    Transmission or reception of a reference signal in a wireless communication system
    9.
    发明授权
    Transmission or reception of a reference signal in a wireless communication system 有权

    公开(公告)号：US11070338B2

    公开(公告)日：2021-07-20

    申请号：US16617551

    申请日：2018-06-15

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Per Ernström ,  Håkan Björkegren ,  Mattias Frenne ,  Lars Lindbom

    IPC分类号： H04L5/00 ,  H04L27/00 ,  H04W72/04

    摘要： A radio node (12, 14) is configured to transmit or receive reference symbols (18) of a reference signal (16) on respective radio resources, including first and second sets (S1, S2) of radio resources that differ in at least one radio resource. The reference signal (16) may be for instance a tracking reference signal (16) configured for time or frequency tracking. The first set (S1) of radio resources includes a first pair of radio resources that are separated from one another in a radio resource domain by a first separation distance (D1). The second set (S2) of radio resources includes a second pair of radio resources that are separated from one another in the radio resource domain by a second separation distance (D2). The radio resource domain may be a time domain or a frequency domain. In one or more embodiments, the second separation distance (D2) is at least twice as large as the first separation distance (D1).