公开(公告)号：US20160242132A1

公开(公告)日：2016-08-18

申请号：US15029414

申请日：2014-10-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Junghwa BAE ,  Sungho CHOI ,  Mingoo KIM

IPC: H04W56/00 ,  H04W74/08

CPC classification number: H04W56/0005 ,  H04W56/0045 ,  H04W74/0833

Abstract: A signal transmitting/receiving method of a user equipment of a mobile communication system according to an embodiment of the present invention comprises the steps of: transmitting a first random access signal including a first random access preamble to a base station; receiving, from the base station, a first random access response signal including first timing advance (TA) information in response to the first random access signal; transmitting, to the base station, a second random access signal including a second random access preamble based on the state of the user equipment; receiving, from the base station, a second random access response signal including second TA information in response to the second random access signal, when the second random access signal is transmitted to the base station; and transmitting a signal to the base station according to third TA information determined on the basis of at least one of the first TA information and the second TA information. In a random access procedure for initial access to a network by the user equipment according to an embodiment of the present invention, the user equipment transmits, two or more times, an RACH preamble signal to a base station, so that a more accurate TA value can be predicted utilizing TA information from two or more response messages received.

Abstract translation: 根据本发明的实施例的移动通信系统的用户设备的信号发送/接收方法包括以下步骤：向基站发送包括第一随机接入前导码的第一随机接入信号; 从所述基站接收响应于所述第一随机接入信号的包括第一定时提前（TA）信息的第一随机接入响应信号; 基于所述用户设备的状态向所述基站发送包括第二随机接入前导码的第二随机接入信号; 当所述第二随机接入信号被发送到所述基站时，从所述基站接收包括响应于所述第二随机接入信号的第二TA信息的第二随机接入响应信号; 以及根据基于所述第一TA信息和所述第二TA信息中的至少一个确定的第三TA信息，向所述基站发送信号。 在根据本发明实施例的用户设备初始接入网络的随机接入过程中，用户设备向基站发送两次或更多次RACH前导码信号，使得更准确的TA值 可以利用收到的两个或多个响应消息的TA信息进行预测。