公开(公告)号：US09398617B2

公开(公告)日：2016-07-19

申请号：US14326273

申请日：2014-07-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Changyu Guo ,  Li Wan ,  Chunhui Le ,  Jing Li ,  Yan Liu

IPC: H04W74/00 ,  H04W74/08 ,  H04J13/00 ,  H04L27/26 ,  H04L5/00

CPC classification number: H04W74/0833 ,  H04J13/0062 ,  H04J2211/005 ,  H04L5/0007 ,  H04L27/2675

Abstract: Embodiments of the present invention relate to a method and an apparatus for processing random access in a wireless communication network, and a processing method of a user equipment and an apparatus. The method for processing random access in the communication network includes: the base station receives a first Zadoff-Chu sequence and a second Zadoff-Chu sequence that are sent by a user equipment, a du of the first Zadoff-Chu sequence is smaller than a du of the second Zadoff-Chu sequence; the base station estimates an error range for a round trip delay RTD of the user equipment according to the first Zadoff-Chu sequence, estimates, according to the second Zadoff-Chu sequence, the RTD within the error range for the RTD or a frequency offset of an uplink signal of the user equipment. The problem that the user equipment with a frequency offset accesses a network is solved.

Abstract translation: 本发明的实施例涉及一种在无线通信网络中处理随机接入的方法和装置，以及用户设备和装置的处理方法。 在通信网络中处理随机接入的方法包括：基站接收由用户设备发送的第一Zadoff-Chu序列和第二Zadoff-Chu序列，第一Zadoff-Chu序列的du小于 du的第二个Zadoff-Chu序列; 基站根据第一Zadoff-Chu序列估计用户设备的往返延迟RTD的误差范围，根据第二Zadoff-Chu序列估计RTD的误差范围内的RTD或频率偏移 的用户设备的上行链路信号。 解决了具有频率偏移的用户设备访问网络的问题。

公开(公告)号：US09698950B2

公开(公告)日：2017-07-04

申请号：US14723597

申请日：2015-05-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xinyu Xu ,  Changyu Guo ,  Wei Su

IPC: H04L12/815 ,  H04W74/08 ,  H04L5/00 ,  H04L27/26 ,  H04L1/00

CPC classification number: H04L5/0048 ,  H04L1/00 ,  H04L5/005 ,  H04L27/26 ,  H04L27/2647 ,  H04L47/225 ,  H04W74/08 ,  H04W74/0833

Abstract: Embodiments of the present invention provide a method and an apparatus for demodulating a physical random access channel signal. The method includes: acquiring a down-sampling sequence of a PRACH demodulation signal, and acquiring a power sequence of the down-sampling sequence; determining a position of a sounding reference signal sampling point in the down-sampling sequence according to the power sequence; and eliminating the sounding reference signal sampling point in the down-sampling sequence according to the position of the sounding reference signal sampling point, so as to perform PRACH coherent detection on a down-sampling sequence obtained after the sounding reference signal sampling point is eliminated. In the method and the apparatus for demodulating a physical random access channel signal in the embodiments of the present invention, interference from a sounding reference signal can be restrained and false alarms in PRACH detection can be reduced.

公开(公告)号：US20140321398A1

公开(公告)日：2014-10-30

申请号：US14326273

申请日：2014-07-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Changyu Guo ,  Li Wan ,  Chunhui Le ,  Jing Li ,  Yan Liu

IPC: H04W74/08 ,  H04J13/00

CPC classification number: H04W74/0833 ,  H04J13/0062 ,  H04J2211/005 ,  H04L5/0007 ,  H04L27/2675

Abstract: Embodiments of the present invention relate to a method and an apparatus for processing random access in a wireless communication network, and a processing method of a user equipment and an apparatus. The method for processing random access in the communication network includes: the base station receives a first Zadoff-Chu sequence and a second Zadoff-Chu sequence that are sent by a user equipment, a du of the first Zadoff-Chu sequence is smaller than a du of the second Zadoff-Chu sequence; the base station estimates an error range for a round trip delay RTD of the user equipment according to the first Zadoff-Chu sequence, estimates, according to the second Zadoff-Chu sequence, the RTD within the error range for the RTD or a frequency offset of an uplink signal of the user equipment. The problem that the user equipment with a frequency offset accesses a network is solved.

Abstract translation: 本发明的实施例涉及一种在无线通信网络中处理随机接入的方法和装置，以及用户设备和装置的处理方法。 在通信网络中处理随机接入的方法包括：基站接收用户设备发送的第一Zadoff-Chu序列和第二Zadoff-Chu序列，第一Zadoff-Chu序列的du小于 du的第二个Zadoff-Chu序列; 基站根据第一Zadoff-Chu序列估计用户设备的往返延迟RTD的误差范围，根据第二Zadoff-Chu序列估计RTD的误差范围内的RTD或频率偏移 的用户设备的上行链路信号。 解决了具有频率偏移的用户设备访问网络的问题。

公开(公告)号：US20150263838A1

公开(公告)日：2015-09-17

申请号：US14723597

申请日：2015-05-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xinyu Xu ,  Changyu Guo ,  Wei Su

IPC: H04L5/00 ,  H04L27/26 ,  H04L12/815 ,  H04W74/08

CPC classification number: H04L5/0048 ,  H04L1/00 ,  H04L5/005 ,  H04L27/26 ,  H04L27/2647 ,  H04L47/225 ,  H04W74/08 ,  H04W74/0833

Abstract: Embodiments of the present invention provide a method and an apparatus for demodulating a physical random access channel signal. The method includes: acquiring a down-sampling sequence of a PRACH demodulation signal, and acquiring a power sequence of the down-sampling sequence; determining a position of a sounding reference signal sampling point in the down-sampling sequence according to the power sequence; and eliminating the sounding reference signal sampling point in the down-sampling sequence according to the position of the sounding reference signal sampling point, so as to perform PRACH coherent detection on a down-sampling sequence obtained after the sounding reference signal sampling point is eliminated. In the method and the apparatus for demodulating a physical random access channel signal in the embodiments of the present invention, interference from a sounding reference signal can be restrained and false alarms in PRACH detection can be reduced.

Abstract translation: 本发明的实施例提供一种用于解调物理随机接入信道信号的方法和装置。 该方法包括：获取PRACH解调信号的下采样序列，并获取下采样序列的功率序列; 根据功率顺序确定下采样序列中的探测参考信号采样点的位置; 并根据探测参考信号采样点的位置消除下采样序列中的探测参考信号采样点，以便在取消探测参考信号采样点之后获得的下采样序列上执行PRACH相干检测。 在本发明的实施例中的用于解调物理随机接入信道信号的方法和装置中，可以抑制来自探测参考信号的干扰，并且可以减少PRACH检测中的误报警。