METHOD AND APPARATUS FOR HANDLING DC SUBCARRIER IN NR CARRIER IN WIRELESS COMMUNICATION SYSTEM

• US 20180035416A1
• Filed: 07/19/2017
• Published: 02/01/2018
• Est. Priority Date: 05/20/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: YI, Yunjung, KIM, Byounghoon, SEO, Hanbyul, KO, Hyunsoo, KIM, Kijun
• Granted Patent: US 10,524,255 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A method and apparatus for operating in a new radio access technology (NR) carrier in a wireless communication system is provided. A user equipment (UE) receives an indication of a system bandwidth and a center frequency of the system bandwidth from a network, and operates subbands in the NR carrier according to the indication. The center frequency of the system bandwidth corresponds to a direct current (DC) subcarrier.

Claims

1. A method for operating in a new radio access technology (NR) carrier by a user equipment (UE) in a wireless communication system, the method comprising:

receiving an indication of a system bandwidth and a center frequency of the system bandwidth from a network; and

operating subbands in the NR carrier according to the indication,

wherein the center frequency of the system bandwidth corresponds to a direct current (DC) subcarrier.

2. The method of claim 1, wherein the indication is received regardless of subband location in which the UE is served.

3. The method of claim 1, wherein the NR carrier coexists with a long-term evolution (LTE) carrier.

4. The method of claim 3, wherein a center frequency of the LTE carrier corresponds the DC subcarrier.

5. The method of claim 3, wherein a gap between a center frequency of the NR carrier and a center frequency of the LTE carrier is multiple 15 kHz.

6. The method of claim 1, wherein the subbands in the NR carrier for uplink (UL) transmission or sidelink (SL) transmission are shifted by either half-subcarrier or 7.5 kHz.

7. The method of claim 1, wherein a center frequency of UL in a LTE carrier is shifted by 7.5 kHz.

8. The method of claim 7, wherein a vehicle-to-vehicle (V2V) communication via SL is performed in the LTE carrier.

9. The method of claim 1, wherein synchronization signals are transmitted in the subbands in the NR carrier without shifting.

10. The method of claim 1, wherein a physical random access channel (PRACH) is transmitted in the subbands in the NR carrier by not passing the DC subcarrier.

11. A user equipment (UE) in a wireless communication system, the UE comprising:

a memory;

a transceiver; and

a processor, coupled to the memory and the transceiver, that;

controls the transceiver to receive an indication of a system bandwidth and a center frequency of the system bandwidth from a network, and

operates subbands in a new radio access technology (NR) carrier according to the indication,

wherein the center frequency of the system bandwidth corresponds to a direct current (DC) subcarrier.

12. The UE of claim 11, wherein the indication is received regardless of subband location in which the UE is served.

13. The UE of claim 11, wherein the NR carrier coexists with a long-term evolution (LTE) carrier.

14. The UE of claim 13, wherein a center frequency of the LTE carrier corresponds the DC subcarrier.

15. The UE of claim 13, wherein a gap between a center frequency of the NR carrier and a center frequency of the LTE carrier is multiple 15 kHz.