METHOD FOR SYNCHRONIZATION SIGNAL TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM

• US 20170303216A1
• Filed: 09/25/2015
• Published: 10/19/2017
• Est. Priority Date: 09/25/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: SEO, Inkwon, SEO, Hanbyul, KIM, Youngtae
• Granted Patent: US 10,455,528 B2
• Time in Patent Office: Days
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 11/0059 Out-of-cell user aspects
• CPC Class Codes: H04J 11/0073 Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group
• CPC Class Codes: H04J 11/0076 Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group
• CPC Class Codes: H04W 52/383 power control in peer-to-peer links
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

An embodiment of the present invention relates to a method for transmitting a synchronization signal in a wireless communication system, the method comprising the steps of: generating a synchronization signal on the basis of a cell ID which is determined depending on whether a terminal for transmitting the synchronization signal is a terminal located outside of a coverage; and transmitting the synchronization signal.

Claims

1. A method of transmitting a synchronization signal in a wireless communication system, the method comprising:

generating the synchronization signal based on a cell ID determined depending on whether a user equipment (UE) for transmitting the synchronization signal is an out-of-coverage UE; and

transmitting the synchronization signal.

2. The method according to claim 1, wherein the cell ID is less than a predetermined value if the UE is an in-coverage UE and is greater than the predetermined value if the UE is an out-of-coverage UE.

3. The method according to claim 1, wherein the synchronization signal includes a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS).

4. The method according to claim 3, wherein, if the synchronization signal is transmitted on the same subframe as a physical sidelink broadcast channel (PSBCH), a transient period is included in a transmission region of the SSSS.

5. The method according to claim 3, wherein transmit power of the PSBCH and transmit power of the SSSS have different values.

6. The method according to claim 3, wherein, if the synchronization signal is transmitted on the same subframe as a physical sidelink broadcast channel (PSBCH), a transient period is included in a reference signal region for the PSBCH.

7. A user equipment (UE) apparatus for transmitting a synchronization signal in a wireless communication system, the UE apparatus comprising:

a transmission module; and

a processor,

wherein the processor generates the synchronization signal based on a cell ID determined depending on whether a user equipment (UE) for transmitting the synchronization signal is an out-of-coverage UE and transmits the synchronization signal.

8. The UE apparatus according to claim 7, wherein the cell ID is less than a predetermined value if the UE is an in-coverage UE and is greater than the predetermined value if the UE is an out-of-coverage UE.

9. The UE apparatus according to claim 7, wherein the synchronization signal includes a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS).

10. The UE apparatus according to claim 9, wherein, if the synchronization signal is transmitted on the same subframe as a physical sidelink broadcast channel (PSBCH), a transient period is included in a transmission region of the SSSS.

11. The UE apparatus according to claim 9, wherein transmit power of the PSBCH and transmit power of the SSSS have different values.

12. The UE apparatus according to claim 9, wherein, if the synchronization signal is transmitted on the same subframe as a physical sidelink broadcast channel (PSBCH), a transient period is included in a reference signal region for the PSBCH.