公开(公告)号：US09451640B2

公开(公告)日：2016-09-20

申请号：US14358758

申请日：2013-07-22

Applicant: ZTE CORPORATION

Inventor： Lei Li ,  Xue Wang ,  Bin Li ,  Hongfeng Qin ,  Xiaoxiao Liu

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

CPC classification number: H04W74/0833 ,  H04L27/2666 ,  H04W74/002

Abstract: A method for acquiring a format of a random access subframe and a receiver are provided. The method includes: according to a cell radius supported currently and a cell coverage radius decided by the length of ZC sequence and the size of Ncs, a receiver determining the length of preamble sequence in an extended random access subframe; according to the cell radius supported currently and a cell coverage radius decided by the length of GT, determining the lengths of CP and GT in the extended random access subframe; according to sampling rates of a system where the receiver is located and the lengths of the preamble sequence and CP and GT, respectively calculating the numbers of sampling points of preamble sequence and GT and CP; based on the above numbers of sampling points, calculating the length of extended random access subframe, and determining the format of extended random access subframe.

Abstract translation: 提供了一种用于获取随机接入子帧和接收机的格式的方法。 该方法包括：根据当前支持的小区半径和由ZC序列的长度和Ncs的大小决定的小区覆盖半径，接收者确定扩展随机接入子帧中的前导序列的长度; 根据当前支持的小区半径和由GT长度确定的小区覆盖半径，确定扩展随机接入子帧中CP和GT的长度; 根据接收机所在系统的采样率和前导码序列的长度以及分别计算前导码序列和GT和CP的采样点数的CP和GT的长度; 基于以上数量的采样点，计算扩展随机接入子帧的长度，并确定扩展随机接入子帧的格式。

公开(公告)号：US20150163829A1

公开(公告)日：2015-06-11

申请号：US14350378

申请日：2013-08-07

Applicant: ZTE Corporation

Inventor： Lei Li ,  Xiaoxiao Liu ,  Bin Li ,  Hongfeng Qin ,  Xue Wang

IPC: H04W74/08

CPC classification number: H04W74/0833 ,  H04W88/08

Abstract: A random access method and random access system for a terminal in a high-speed mobile environment are provided. Wherein, the method comprises: selecting a random access preamble format according to a preset cell coverage radius target value; judging whether using a restricted set of cyclic shift quantities pre-configured satisfies a requirement of the cell coverage radius target value under the selected random access preamble format; if not satisfying, selecting a cyclic shift quantity which satisfies the requirement of the cell coverage radius target value from a unrestricted set of the cyclic shift quantities pre-configured; and generating a random access signal according to the cyclic shift quantity and a pre-configured mother code, and performing access using the random access signal. Through the above-mentioned technical scheme, the embodiment of the present document provides a more perfect random access method and random access system for a terminal in a high-speed mobile environment.

Abstract translation: 提供了一种用于高速移动环境中的终端的随机接入方法和随机接入系统。 其中，该方法包括：根据预设的小区覆盖半径目标值选择随机接入前导码格式; 判断是否使用预先配置的限制循环移位量集合满足所选择的随机接入前同步码格式下的小区覆盖半径目标值的要求; 如果不满足，则从预先配置的循环移位量的不受限制的集合中选择满足小区覆盖半径目标值的要求的循环移位量; 以及根据所述循环移位量和预配置的母码生成随机接入信号，并使用所述随机接入信号进行接入。 通过上述技术方案，本文的实施例为高速移动环境中的终端提供了更完美的随机接入方法和随机接入系统。

公开(公告)号：US09426829B2

公开(公告)日：2016-08-23

申请号：US14385568

申请日：2013-07-23

Applicant: ZTE CORPORATION

Inventor： Bin Li ,  Xue Wang ,  Lei Li ,  Hongfeng Qin ,  Xiaoxiao Liu

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

CPC classification number: H04W74/0833 ,  H04L5/0048 ,  H04L5/14 ,  H04L5/1438 ,  H04L7/0079 ,  H04W56/004 ,  H04W56/0055

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20150181622A1

公开(公告)日：2015-06-25

申请号：US14385568

申请日：2013-07-23

Applicant: ZTE CORPORATION

Inventor： Bin Li ,  Xue Wang ,  Lei Li ,  Hongfeng Qin ,  Xiaoxiao Liu

IPC: H04W74/08 ,  H04L7/00 ,  H04L5/14

CPC classification number: H04W74/0833 ,  H04L5/0048 ,  H04L5/14 ,  H04L5/1438 ,  H04L7/0079 ,  H04W56/004 ,  H04W56/0055

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20150124716A1

公开(公告)日：2015-05-07

申请号：US14358758

申请日：2013-07-22

Applicant: ZTE CORPORATION

Inventor： Lei Li ,  Xue Wang ,  Bin Li ,  Hongfeng Qin ,  Xiaoxiao Liu

IPC: H04W74/08

CPC classification number: H04W74/0833 ,  H04L27/2666 ,  H04W74/002

Abstract: A method for acquiring a format of a random access subframe and a receiver are provided. The method includes: according to a cell radius supported currently and a cell coverage radius decided by the length of ZC sequence and the size of Ncs, a receiver determining the length of preamble sequence in an extended random access subframe; according to the cell radius supported currently and a cell coverage radius decided by the length of GT, determining the lengths of CP and GT in the extended random access subframe; according to sampling rates of a system where the receiver is located and the lengths of the preamble sequence and CP and GT, respectively calculating the numbers of sampling points of preamble sequence and GT and CP; based on the above numbers of sampling points, calculating the length of extended random access subframe and determining the format of extended random access subframe.

Abstract translation: 提供了一种用于获取随机接入子帧和接收机的格式的方法。 该方法包括：根据当前支持的小区半径和由ZC序列的长度和Ncs的大小决定的小区覆盖半径，接收者确定扩展随机接入子帧中的前导序列的长度; 根据当前支持的小区半径和由GT长度确定的小区覆盖半径，确定扩展随机接入子帧中CP和GT的长度; 根据接收机所在系统的采样率和前导码序列的长度以及分别计算前导码序列和GT和CP的采样点数的CP和GT的长度; 基于上述数量的采样点，计算扩展随机接入子帧的长度并确定扩展随机接入子帧的格式。

公开(公告)号：US09622268B2

公开(公告)日：2017-04-11

申请号：US14350378

申请日：2013-08-07

Applicant: ZTE Corporation

Inventor： Lei Li ,  Xiaoxiao Liu ,  Bin Li ,  Hongfeng Qin ,  Xue Wang

IPC: H04W74/08 ,  H04W88/08

CPC classification number: H04W74/0833 ,  H04W88/08

Abstract: A random access method and random access system for a terminal in a high-speed mobile environment are provided. Wherein, the method comprises: selecting a random access preamble format according to a preset cell coverage radius target value; judging whether using a restricted set of cyclic shift quantities pre-configured satisfies a requirement of the cell coverage radius target value under the selected random access preamble format; if not satisfying, selecting a cyclic shift quantity which satisfies the requirement of the cell coverage radius target value from a unrestricted set of the cyclic shift quantities pre-configured; and generating a random access signal according to the cyclic shift quantity and a pre-configured mother code, and performing access using the random access signal. Through the above-mentioned technical scheme, the embodiment of the present document provides a more perfect random access method and random access system for a terminal in a high-speed mobile environment.