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    SYSTEM AND METHOD FOR RADIO CELL SYNCHRONIZATION
    1.
    发明申请
    SYSTEM AND METHOD FOR RADIO CELL SYNCHRONIZATION 审中-公开

    公开(公告)号：US20190028982A1

    公开(公告)日：2019-01-24

    申请号：US15657586

    申请日：2017-07-24

    申请人： Ceva D.S.P. Ltd.

    发明人： Omri ISAACS ,  Zeev KAPLAN ,  Tal SHALEV

    IPC分类号： H04W56/00 ,  H04L5/00 ,  H04L7/00

    CPC分类号： H04W56/001 ,  H04L5/0007 ,  H04L7/007 ,  H04W56/00 ,  H04W56/0055 ,  H04W88/02 ,  H04W88/08

    摘要： A system and method for cell synchronization suitable for a wireless signal including substantially identical synchronization signals that repeat in predetermined time intervals, the synchronization signals including a plurality of substantially identical symbols. For a plurality of candidate synchronization points: dividing the wireless signal into a plurality of signal segments, each equal or longer than the time interval, and each including a plurality of sub-segments having substantially same length as the symbol; performing symbol-length cross-correlations between an expected symbol and the sub-segments; performing segmented symbol-wise correlations between the cross-correlation results; calculating a cost function based on the results of the symbol-wise correlations; accumulating the cost functions across a plurality of signal segments; and selecting a coarse synchronization point from the plurality of candidate synchronization points based on the accumulated cost function; Estimating synchronization parameters e.g. time and frequency offset based on the selected synchronization point.

    ASYNCHRONOUS MULTIPLE ACCESS METHOD AND DEVICE FOR LOW LATENCY SERVICE
    2.
    发明申请
    ASYNCHRONOUS MULTIPLE ACCESS METHOD AND DEVICE FOR LOW LATENCY SERVICE 审中-公开

    公开(公告)号：US20180146445A1

    公开(公告)日：2018-05-24

    申请号：US15572030

    申请日：2016-03-22

    申请人： LG ELECTRONICS INC.

    发明人： Hojae LEE ,  Hyunsoo KO ,  Kukheon CHOI ,  Kwangseok NOH ,  Dongkyu KIM ,  Sangrim LEE

    IPC分类号： H04W56/00 ,  H04W74/00 ,  H04W72/04

    CPC分类号： H04W56/0055 ,  H04W8/186 ,  H04W56/00 ,  H04W72/042 ,  H04W74/002 ,  H04W74/006 ,  H04W74/08 ,  H04W88/08

    摘要： Disclosed is an asynchronous multiple access method and device for a low latency service. The asynchronous multiple access method for low latency service may include the steps of: grouping, by an eNB, each of a plurality of UEs into one UE group among a plurality of UE groups in consideration of each of a plurality of propagation delays of each of the plurality of UEs; receiving, by the eNB, each of a plurality of pieces of uplink data transmitted by each of the plurality of UE groups on each of a plurality of wireless resources allocated for each of the plurality of UE groups at an internal access timing; and transmitting, by the eNB to each of the plurality of UE groups, each of a plurality of ACKs/NACKs signals in response to each of a plurality of uplink frames, wherein the internal access timing can be periodically defined in a symbol unit for the synchronization of transmitting times of the plurality of pieces of uplink data.

    Air-interface-based synchronization method, base station, control apparatus, and wireless communications system
    3.
    发明授权
    Air-interface-based synchronization method, base station, control apparatus, and wireless communications system 有权

    公开(公告)号：US09980242B2

    公开(公告)日：2018-05-22

    申请号：US14983208

    申请日：2015-12-29

    申请人： Huawei Technologies Co., Ltd.

    发明人： Jun Hu

    IPC分类号： H04W56/00 ,  H04B7/26 ,  H04W88/08 ,  H04W88/12

    CPC分类号： H04W56/0015 ,  H04B7/2696 ,  H04W56/0055 ,  H04W88/08 ,  H04W88/12

    摘要： The present disclosure discloses an air-interface-based synchronization method, a base station and its control apparatus, and a wireless communications system. By taking advantage of active random access of user equipment, a time difference between base stations is acquired by detecting a random access preamble, and a time adjustment value of a non-reference base station is acquired according to the acquired time difference and reference time of a reference base station; and the non-reference base station performs time adjustment according to the acquired time adjustment value, to complete time synchronization with the reference base station. The present disclosure can easily and effectively implement air-interface-based synchronization between base stations by using an existing wireless network, thereby achieving a technical effect in a convenient and economic manner.

    Random access method and receiver
    8.
    发明授权
    Random access method and receiver 有权
    随机存取方式和接收方

    公开(公告)号：US09426829B2

    公开(公告)日：2016-08-23

    申请号：US14385568

    申请日：2013-07-23

    申请人： ZTE CORPORATION

    发明人： Bin Li ,  Xue Wang ,  Lei Li ,  Hongfeng Qin ,  Xiaoxiao Liu

    IPC分类号： H04W74/08 ,  H04W56/00 ,  H04L5/14 ,  H04L7/00

    CPC分类号： H04W74/0833 ,  H04L5/0048 ,  H04L5/14 ,  H04L5/1438 ,  H04L7/0079 ,  H04W56/004 ,  H04W56/0055

    摘要： The embodiments of the present document provide a random access method and a receiver, wherein, the random access method includes: after starting up, a receiver performing cell search and downlink synchronization to obtain a time reference; the receiver obtaining a distance between itself and a base station; the receiver selecting a random access format according to parameters and a load condition of the system where it is located; the receiver obtaining a cell radius supported by the selected random access format, and calculating a line-of-sight transmission time delay if the cell radius is less than the distance; and based on the time reference, the receiver transmitting a random access subframe the line-of-sight transmission time delay in advance.

    摘要翻译： 本发明的实施例提供一种随机接入方法和接收机，其中随机接入方法包括：启动后，接收机执行小区搜索和下行同步以获得时间参考; 所述接收机获得其自身与基站之间的距离; 接收机根据其所在系统的参数和负载条件选择随机接入格式; 所述接收器获得由所选择的随机存取格式支持的单元半径，以及如果所述单元半径小于所述距离，则计算视线传输时间延迟; 并且基于所述时间参考，所述接收机预先向所述随机接入子帧发送所述视距传输时间延迟。

    Method and apparatus for configuring enhanced timing measurements involving multifarious radio links
    9.
    发明授权
    Method and apparatus for configuring enhanced timing measurements involving multifarious radio links 有权
    用于配置涉及多种无线电链路的增强时序测量的方法和装置

    公开(公告)号：US09185670B2

    公开(公告)日：2015-11-10

    申请号：US14125395

    申请日：2012-06-13

    申请人： Iana Siomina ,  Muhammad Kazmi

    发明人： Iana Siomina ,  Muhammad Kazmi

    IPC分类号： H04W56/00

    CPC分类号： H04W56/001 ,  H04W56/0055

    摘要： In its various aspects, the present invention addresses the many challenges associated with making timing measurements involving multifarious radio links. Such measurements are referred to herein as “enhanced” to connote that such timing determinations are being made across multifarious radio links. Here, a radio link will be understood as connecting two radio nodes, and two radio links are considered to be multifarious with respect to each other if they are opposite in terms of uplink and downlink transmit directions, and further if they are associated with different cell identifiers and/or if the two links are between different pairs of radio nodes. In this context, the teachings herein disclose the sharing of “enhanced timing measurement” capability information, e.g., between radio nodes and positioning nodes. Such information indicates the enhanced timing measurement capability of a radio node. Sharing such information enables another node, e.g., a positioning node, to determine an enhanced timing measurement configuration to be used by a radio node. Further, additional teachings herein disclose advantageous configurations for making enhanced timing measurements, and techniques for compensating timing measurements determined from multifarious radio links, e.g., compensating for frequency-dependent propagation time differences.

    摘要翻译： 在各方面，本发明解决了涉及多个无线电链路的定时测量相关的许多挑战。 这样的测量在本文中被称为“增强的”，以表示正在通过多种无线电链路进行这样的定时确定。 这里，无线电链路将被理解为连接两个无线电节点，并且如果两个无线电链路在上行链路和下行链路传输方向上相反，则认为两个无线电链路相对于彼此是多重的，并且如果它们与不同的小区相关联 标识符和/或如果两个链路在不同的无线电节点对之间。 在这种情况下，本文的教导公开了例如在无线电节点和定位节点之间共享“增强的时序测量”能力信息。 这样的信息表示无线电节点的增强的定时测量能力。 共享这样的信息使得另一个节点，例如定位节点能够确定由无线电节点使用的增强的定时测量配置。 此外，本文的另外的教导公开了用于进行增强的时序测量的有利配置，以及用于补偿从多种无线电链路确定的定时测量的技术，例如补偿频率相关的传播时间差。

    Uplink timing maintenance upon time alignment timer expiry
    10.
    发明授权
    Uplink timing maintenance upon time alignment timer expiry 有权
    上行时间定时维护定时器到期

    公开(公告)号：US09167547B2

    公开(公告)日：2015-10-20

    申请号：US13770376

    申请日：2013-02-19

    申请人： Research In Motion Limited

    发明人： Takashi Suzuki ,  Zhijun Cai ,  Andrew Mark Earnshaw

    IPC分类号： H04W56/00

    CPC分类号： H04W56/0055 ,  H04W56/0005 ,  H04W56/003 ,  H04W56/0045

    摘要： Systems, apparatuses, and methods for uplink timing maintenance in wireless communications are provided. Certain aspects of the disclosure involve applying a timing advance command to adjust uplink transmission timing/resume uplink synchronization; and determining a metric. The metric can be used in determining whether to apply a timing advance command (TAC) to resume uplink resynchronization.

    摘要翻译： 提供了用于无线通信中的上行链路定时维护的系统，装置和方法。 本公开的某些方面涉及应用定时提前命令来调整上行链路传输定时/恢复上行链路同步; 并确定度量。 该度量可用于确定是否应用定时提前命令（TAC）来恢复上行链路重新同步。