US 11,115,144 B2 · Cell search method in wireless communication system and apparatus therefor

Abstract

A cell search method of a terminal in a wireless communication system, comprises: a step of receiving a narrow band synchronization signal through a narrow band from a base station; and a step of acquiring time synchronization and frequency synchronization with the base station on the basis of the narrow band synchronization signal and detecting an identifier of the base station, wherein the narrow band has a system bandwidth of 180 kHz and includes twelve carriers arranged at intervals of 15 kHz, and the narrow band synchronization signal consists of a first narrow band synchronization signal and a second narrow band synchronization signal, wherein the first narrow band synchronization signal can be transmitted in a sixth subframe of a radio frame and the second narrow band synchronization signal can be transmitted in a tenth subframe of the radio frame.

Claims15

Dependent claims

A method of performing, by a user equipment (UE), cell search in a wireless communication system, the method comprising:

receiving, from a base station (BS), a Narrowband Primary Synchronization Signal (NPSS) and a Narrowband Secondary Synchronization Signal (NSSS);
and
acquiring time synchronization and frequency synchronization with the BS and detecting an identifier of the BS based on the NPSS and the NSSS,
wherein the NPSS is transmitted in a sixth subframe of a each frame of a plurality of frames, and
wherein the NSSS is transmitted in a tenth subframe of a every other frame of the plurality of frames.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/738,724Filed 9 Jan 2020 · continuation

Priority

15 Sep 2015

Published

US 2020/0153530 A114 May 2020

Granted

7 Sep 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04J 11/0069
Orthogonal multiplex systems, e.g. using WALSH codes: cell search, i.e. determining cell identity [cell-ID]
H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver
H04L 12/189
For broadcast or conference , e.g. multicast: in combination with wireless systems
H04L 27/2613
Details of reference signals: structure of the reference signals

Family

Application62/219,067Us provisional application · filed 15 Sep 2015

Application62/222,788Us provisional application · filed 24 Sep 2015

Application62/267,219Us provisional application · filed 14 Dec 2015

PCT/KR2016/010427Parent of this continuation · filed 19 Sep 2016

US 2020/0153530 A1Pre-grant publication · published 14 May 2020

Application15/760,587Parent of this continuation

US 10,560,208 B2Parent of this continuation

US 2018/0278355 A1Published application

US 11,115,144 B2This patent

From the US filing history. Foreign family members aren’t listed.

Cell search method in wireless communication system and apparatus therefor

Life of this patent

Cell search method in wireless communication system and apparatus therefor

Life of this patent

Abstract

Claims15