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    Method and a system for dynamic association of spatial layers to beams in millimeter-wave fixed wireless access networks
    2.
    发明授权
    Method and a system for dynamic association of spatial layers to beams in millimeter-wave fixed wireless access networks 有权

    公开(公告)号：US11128352B2

    公开(公告)日：2021-09-21

    申请号：US16597641

    申请日：2019-10-09

    Applicant: Telefonica, S.A.

    Inventor： Javier Lorca Hernando ,  Elena Serna Santiago

    IPC: H04B7/0408 ,  H04B7/0413 ,  H04B7/06 ,  H04W28/06 ,  H04W72/04 ,  H04W72/12

    Abstract: Method and system to dynamically associate spatial layers to beams in a FWA network operating in the millimeter-wave frequency range. A base station and a CPE are willing to wirelessly transmit and receive data through a wireless channel of the FWA network, the base station having beamforming capabilities henceforth generating multiple wireless beams. The base station performs all baseband wireless functions related for creating, keeping and managing the connections between the base station and the CPE at baseband level, wherein information is handled in the form of up to M spatial layer signals, and with no built-in capabilities for creation, detection or management of the beams. The base station also performs all necessary RF functions at millimeter-wave frequencies, including beamforming and conversion from complex baseband signals to RF signals and vice versa, and also couples the RF signals to the wireless channel.

    Method for performing multiple access in wireless OFDM cellular systems over multipath wireless channels considering both space and frequency domains, base station and computer programs thereof
    5.
    发明授权
    Method for performing multiple access in wireless OFDM cellular systems over multipath wireless channels considering both space and frequency domains, base station and computer programs thereof 有权
    考虑到空间和频域，基站和其计算机程序，在多径无线信道上在无线OFDM蜂窝系统中执行多重接入的方法

    公开(公告)号：US09425870B2

    公开(公告)日：2016-08-23

    申请号：US14978623

    申请日：2015-12-22

    Applicant: Telefonica, S.A.

    Inventor： Javier Lorca Hernando

    IPC: H04W4/00 ,  H04L1/02 ,  H04L27/02 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H01Q21/06 ,  H04L5/00

    CPC classification number: H04B7/0413 ,  H01Q21/061 ,  H04B7/0408 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0697 ,  H04L5/0003 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/0094

    Abstract: Methods, a base station and computer programs for performing multiple access in wireless OFDM cellular systems over multipath wireless channels considering both space and frequency domains,The base station 100 comprises a large number of antennas 103 in the form of a two-dimensional array and transmits a given number of signals to a number of users 106, so that each one receives its intended signal (or set of intended signals) without interference to/from the other users 106. The base station 100 includes a scheduler in space-time-frequency dimensions 101 as well as an orthogonal space-frequency processing technique 102 for addressing the users 106. The cellular scenario is assumed where the wireless channel 105 presents significant multipath, thereby resulting in multiple signal components being received by each user 106. Orthogonality of the beams is achieved upon transmission by properly discretizing the spatial domain, while inter-user interference is avoided by exciting only those beams that result in multipath components received by one single user 106.

    Abstract translation: 方法，基站和计算机程序，用于在无线OFDM蜂窝系统中通过考虑空间和频域的多径无线信道执行多址接入。基站100包括二维阵列形式的大量天线103和发射 向多个用户106发送给定数量的信号，使得每个人在不干扰其他用户106的情况下接收其预期信号（或预期信号集合）。基站100包括空时频率调度器 尺寸101以及用于寻址用户106的正交空频处理技术102.假设无线信道105呈现显着多路径的蜂窝场景，从而导致每个用户106接收多个信号分量。波束的正交性 通过适当地离散空间域的传播来实现，而通过仅激发tho来避免用户间干扰 e波束，其导致由单个用户106接收的多径分量。

    METHOD AND SYSTEM FOR ASSISTING USER DEVICES IN PERFORMING INTERFERENCE CANCELLATION IN OFDMA WIRELESS COMMUNICATION NETWORKS
    6.
    发明申请
    METHOD AND SYSTEM FOR ASSISTING USER DEVICES IN PERFORMING INTERFERENCE CANCELLATION IN OFDMA WIRELESS COMMUNICATION NETWORKS 有权
    用于在无线通信网络中执行干扰消除的用户设备的方法和系统

    公开(公告)号：US20160095095A1

    公开(公告)日：2016-03-31

    申请号：US14871075

    申请日：2015-09-30

    Applicant: Telefonica, S.A.

    Inventor： Javier Lorca Hernando

    IPC: H04W72/04 ,  H04B17/345 ,  H04L1/00 ,  H04L1/22 ,  H04L5/00 ,  H04B7/04

    CPC classification number: H04W72/042 ,  H04B7/0413 ,  H04B17/345 ,  H04J11/005 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/22 ,  H04L5/0023 ,  H04L27/2613

    Abstract: A system and method are provided for assisting user devices in performing OFDMA downlink interference cancellation, in which an interfering base station transmits a downlink signal in a first slot and a second slot, both slots including cell reference signals (CRSs) for physical channel estimation, the CRS of the second slot is modified to indicate encoded values of parameters characterizing the physical channel according to an encoding procedure, the slots are received by a served user device that detects the physical channel parameters carried by dedicated control signalling and encodes them by the encoding procedure, an unchanged CRS is reconstructed, and the slots are received by an interfered user device obtaining the encoded values and comparing to parameter patterns indicating absence of modifications in the CRSs, wherein if the encoded values are different from the patterns, the interfered user device decodes them to perform interference cancellation of the downlink signal.

    Abstract translation: 提供了一种用于辅助用户设备执行OFDMA下行链路干扰消除的系统和方法，其中干扰基站在第一时隙和第二时隙中发送下行链路信号，包括用于物理信道估计的小区参考信号（CRS） 第二时隙的CRS被修改为指示根据编码过程表征物理信道的参数的编码值，时隙由服务用户设备接收，该服务用户设备检测由专用控制信令携带的物理信道参数，并通过编码 过程中，重建不变的CRS，并且插入时隙被干扰用户设备接收，获得编码值并与指示CRS中没有修改的参数模式进行比较，其中如果编码值与模式不同，则受干扰的用户设备 解码它们以执行下行链路信号的干扰消除。

    METHOD FOR IMPLEMENTING A CELL LOAD BALANCING MECHANISM IN WIRELESS NETWORKS
    7.
    发明申请
    METHOD FOR IMPLEMENTING A CELL LOAD BALANCING MECHANISM IN WIRELESS NETWORKS 有权
    在无线网络中实现小区负载均衡机制的方法

    公开(公告)号：US20150208280A1

    公开(公告)日：2015-07-23

    申请号：US14417418

    申请日：2013-07-23

    Applicant: Telefonica, S.A.

    Inventor： Javier Lorca Hernando

    IPC: H04W28/08

    CPC classification number: H04W28/085 ,  H04L47/14 ,  H04W16/08 ,  H04W24/02 ,  H04W28/08 ,  H04W36/22 ,  H04W48/20 ,  H04W72/0486

    Abstract: The method comprising at least one wireless user terminal, UE, connected through a wireless network to a serving base station and a plurality of network cells, each one comprising a base station, said at least one wireless UE: estimating the cell loads of the serving base station and of the plurality of network cells by analysing a downlink air interface load; providing to said wireless network, information about the actual cell load estimation of said plurality of cells, and performing a network cell selection based on said estimated cell loads, wherein said cell selection is performed without any exchange of cell load between said plurality of network cells.

    Abstract translation: 该方法包括至少一个通过无线网络连接到服务基站的无线用户终端，UE，以及多个网络小区，每个网络小区包括基站，所述至少一个无线UE：估计服务的小区负载 基站和多个网络小区通过分析下行链路空中接口负载; 向所述无线网络提供关于所述多个小区的实际小区负载估计的信息，以及基于所述估计的小区负载来执行网络小区选择，其中所述小区选择在所述多个网络小区之间没有任何交换小区负载的情况下执行 。

    Method to provide increased robustness against noise and interference in wireless communications, a transmitter and computer program products thereof
    8.
    发明授权
    Method to provide increased robustness against noise and interference in wireless communications, a transmitter and computer program products thereof 有权

    公开(公告)号：US10778499B2

    公开(公告)日：2020-09-15

    申请号：US16052835

    申请日：2018-08-02

    Applicant: TELEFONICA, S.A.

    Inventor： Javier Lorca Hernando ,  Carlos González Sánchez

    IPC: H04L27/36 ,  H04L27/26

    Abstract: A method to provide robustness against noise and interference in wireless communications, a transmitter and computer program products, involving sending to a receiver (13), through a wireless channel (12), information using a constant-envelope waveform with complex baseband representation of the form s[n]=Ac exp{jϕ[n]}. The phase ϕ[n] following the expression ( ϕ ⁡ [ n ] - ϕ ⁡ [ n - 1 ] ) = 2 ⁢ π ⁢ ⁢ m · ∑ k = k 0 + 1 k 0 + N a , F ⁢ ⁢ M + - 1 ⁢ x ⁡ [ k ] ⁢ exp ⁡ ( j ⁢ ⁢ 2 ⁢ π ⁢ ⁢ kn N ) , and the wireless channel has an Additive White Gaussian Noise component and flat-fading conditions, wherein the transmitter (110) calculates a FFT length, N, and a number of active positive subcarriers, Na,FM+, needed in order to have a given improvement in the signal to noise ratio at the active positive subcarriers of the instantaneous frequency spectrum containing the information; calculates a cutoff subcarrier k0 needed to overcome Doppler, phase noise and carrier frequency offset impairments at the receiver side, and generates a complex baseband signal waveform of the form s[n]=Ac exp{jϕ[n]} carrying information with the FFT length, number of active positive subcarriers and cutoff subcarrier.

    Method and system for performing multiple access in wireless OFDM cellular systems considering both space and frequency domains
    10.
    发明授权
    Method and system for performing multiple access in wireless OFDM cellular systems considering both space and frequency domains 有权
    考虑空间和频域的无线OFDM蜂窝系统中执行多址接入的方法和系统

    公开(公告)号：US09276648B2

    公开(公告)日：2016-03-01

    申请号：US14282227

    申请日：2014-05-20

    Applicant: TELEFONICA, S.A.

    Inventor： Javier Lorca Hernando

    IPC: H04W4/00 ,  H04L1/02 ,  H04L27/02 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04L5/00 ,  H04L27/26 ,  H01Q1/24 ,  H01Q21/06

    CPC classification number: H04B7/0413 ,  H01Q1/246 ,  H01Q21/061 ,  H04B7/0452 ,  H04B7/0617 ,  H04L5/0003 ,  H04L27/2601

    Abstract: The method comprising a base station equipped with a large number of antennas according to a two-dimensional rectangular array and a number M of cell users, said rectangular array comprising N1 antenna elements along one axis with a regular spacing dx and N2 antenna elements along a perpendicular axis with a regular spacing dy, said users being characterized by angles (θ,φ) in a spherical coordinate system, where in order to achieve orthogonal multiple access the method comprises: selecting a grid spacing (Δu,Δv) in the (u, v) domain; discretizing the (u, v) domain; constructing a set of signals ST[k,l,f]; calculating time-domain excitations AT[n,m,t]for the antenna elements in the array given by coordinates (ndx,mdy) for generation of the downlink transmit signals; and obtaining the frequency contents SR[k,l,f] of the complex baseband signals received from the M users in the uplink.The system implements the method of the invention.

    Abstract translation: 该方法包括：根据二维矩阵阵列和M个小区用户配备大量天线的基站，所述矩阵包括沿着一个轴的N1个天线元素，具有规则的间隔dx和沿着 垂直轴与规则间隔dy，所述用户的特征在于在球面坐标系中的角度（＆amp;θ，＆phgr）），其中为了实现正交多重访问，该方法包括：选择网格间距（＆Dgr; u，＆Dgr; v）在（u，v）域中; 离散（u，v）域; 构造一组信号ST [k，l，f]; 计算由坐标（ndx，mdy）给出的用于生成下行链路发射信号的阵列中的天线元件的时域激励AT [n，m，t] 并获得从上行链路中的M个用户接收的复基带信号的频率内容SR [k，l，f]。 该系统实现本发明的方法。

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