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1. (WO2018058917) INITIAL ACCESS METHOD AND APPARATUS

Pub. No.:    WO/2018/058917    International Application No.:    PCT/CN2017/077791
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Fri Mar 24 00:59:59 CET 2017
IPC: H04W 72/04
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: XU, Kai
徐凯
ZHUANG, Hongcheng
庄宏成
Title: INITIAL ACCESS METHOD AND APPARATUS
Abstract:
Provided are an initial access method and apparatus. The method comprises: an access network device using at least two downlink wave beams to send a synchronization signal to a user equipment, wherein the synchronization signal comprises downlink wave beam indexes of the at least two downlink wave beams; the access network device receiving a random access preamble sequence sent by the user equipment; and the access network device using the at least two downlink wave beams to send a random access response (RAR) message to the user equipment, so as to finish the initial access of the user equipment. By using an initial access method provided by the embodiments of the present invention, the disadvantage that a channel is not stable in a high frequency transmission environment in a new wireless system can be overcome, so as to improve the initial access performance of an NR system and further to improve the user experience of the system.