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1. (WO2018195984) METHOD AND DEVICE FOR SENDING RANDOM ACCESS PREAMBLE

Pub. No.:    WO/2018/195984    International Application No.:    PCT/CN2017/082578
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat Apr 29 01:59:59 CEST 2017
IPC: H04W 74/08
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: LUO, Zhihu
罗之虎
CHEN, Zhe
陈哲
JIN, Zhe
金哲
Title: METHOD AND DEVICE FOR SENDING RANDOM ACCESS PREAMBLE
Abstract:
A method and device for sending a random access preamble. The method comprises: a terminal device acquiring random access configuration information sent by a network device, wherein the random access configuration information is used to indicate a format of a random access preamble; the terminal device determining, according to the random access configuration information and a pre-set rule, frequency point information, sent to the network device, about the random access preamble; and the terminal device sending, according to the frequency point information, the random access preamble to the network device based on the format, wherein the random access preamble is composed of L symbol groups, L is a positive integer greater than 4, there is frequency hopping between every two adjacent symbol groups, each symbol group is sent by means of a sub-carrier frequency point, and the frequency point information comprises frequency points which respectively correspond to the L symbol groups. The single-carrier sending method for symbol groups of a random access preamble and the frequency point information determined according to a new format enable a terminal device to adapt to the application scenario of an NB-IoT system supporting a narrower sub-carrier bandwidth and covering a larger cell radius.