Method for receiving system information in wireless communication system that supports narrowband IOT and apparatus for the same

• US 10,237,862 B2
• Filed: 02/24/2017
• Issued: 03/19/2019
• Est. Priority Date: 02/26/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Shin, Seokmin, Ko, Hyunsoo, Yi, Yunjung
• Primary Examiner(s): Lee, Chi Ho A
• Application Number:
  US15/442,349
• Publication Number:
  US 20170251443A1
• Time in Patent Office: 753 Days
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method for receiving system information performed by a terminal in a wireless communication system that supports Narrow Band (NB)-Internet of Things (IoT) includes receiving a Narrowband Synchronization Signal from a base station through narrowband (NB); acquiring time synchronization and frequency synchronization with the base station based on the Narrowband Synchronization Signal; and receiving the system information related to the NB-IoT from the base station through a Narrowband Physical Broadcast Channel (N-PBCH).

Claims

1. A method for receiving system information in a wireless communication system supporting Narrow Band (NB)-Internet of Things (IoT), the method performed by a terminal and comprising:

receiving an NB synchronization signal (NBSS) through an NB from a base station (BS);

acquiring time synchronization and frequency synchronization with the BS based on the received NBSS; and

receiving the system information related to the NB-IoT through an NB physical broadcast channel from the BS,

wherein the system information includes at least operation mode information indicating an operation mode of the NB-IoT system or channel information indicating a channel raster offset.

2. The method of claim 1, wherein the operation mode is an in-band mode, a guard-band mode or a stand-alone mode.

3. The method of claim 2, wherein the in-band mode includes a first in-band mode in which the NB-IoT system and a Long Term Evolution (LTE) system have a same Physical Cell ID (PCID) and a second in-band mode in which the NB-IoT system and the LTE system have different PCIDs.

4. The method of claim 3, wherein the channel raster offset is +2.5 kHz, +7.5 kHz, −

2.5 kHz or −

7.5 kHz.

5. The method of claim 1, wherein the system information is a Master Information Block.

6. The method of claim 1, wherein the NB is a system bandwidth that corresponds to one Physical Resource Block (PRB) of a Long Term Evolution system.

7. The method of claim 6, wherein the one PRB includes 12 subcarriers.

8. The method of claim 1, wherein the NB synchronization signal includes an NB primary synchronization signal and an NB secondary synchronization signal.

9. The method of claim 1, wherein the NB synchronization signal is generated using a Zadoff-Chu (ZC) sequence.

10. The method of claim 7, wherein the NB primary synchronization signal is received through 11 contiguous subcarriers among the 12 subcarriers.

11. A terminal for receiving system information in a wireless communication system supporting narrowband (NB)-Internet of Things (IoT), the terminal comprising:

a Radio Frequency (RF) unit for transmitting and receiving a radio signal; and

a processor for;

controlling the RF unit to receive an NB synchronization signal (NBSS) through an NB from a base station (BS);

acquiring time synchronization and frequency synchronization with the BS based on the received NBSS; and

controlling the RF unit to receive the system information related to the NB-IoT through an NB physical broadcast channel from the BS,

wherein the system information includes at least one of operation mode information indicating an operation mode of the NB-IoT system or channel raster offset information indicating a channel raster offset.

12. The terminal of claim 11, wherein the operation mode is an in-band mode operated in an in-band, a guard-band mode operated in a guard-band or a stand-alone mode operated in stand-alone.

13. The terminal of claim 12, wherein the in-band mode includes a first in-band mode in which the NB-IoT system and a Long Term Evolution (LTE) system have a same Physical Cell ID (PCID) and a second in-band mode in which the NB-IoT system and LTE system have different PCIDs.

14. The terminal of claim 13, wherein the channel raster offset is +2.5 kHz, +7.5 kHz, −

2.5 kHz or −

7.5 kHz.

15. The terminal of claim 11, wherein the system information is a Master Information Block.

16. The terminal of claim 11, wherein the NB is a system bandwidth that corresponds to one Physical Resource Block (PRB) of a Long Term Evolution system.

17. The terminal of claim 16, wherein the one PRB includes 12 subcarriers.

18. The terminal of claim 11, wherein the NB synchronization signal includes an NB primary synchronization signal and an NB secondary synchronization signal.

19. The terminal of claim 11, wherein the NB synchronization signal is generated using a Zadoff-Chu (ZC) sequence.

20. The terminal of claim 17, wherein the NB primary synchronization signal is received through 11 contiguous subcarriers among the 12 subcarriers.