Method and Apparatus for Receiving a Timing Advance Command in a Wireless Communication System

• US 20120281628A1
• Filed: 01/07/2011
• Published: 11/08/2012
• Est. Priority Date: 01/07/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sung Jun, Chun, Sung Duck, Jung, Sung Hoon, Yi, Seung June, Lee, Young Dae
• Granted Patent: US 9,143,970 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04J 11/003 at the transmitter transmission to multiple receive units in multiple input multiple output [MIMO] H04B7/0452; transmit antenna weighting H04B7/0615
• CPC Class Codes: H04J 11/0079 Acquisition of downlink reference signals, e.g. detection of cell-ID
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 56/00 Synchronisation arrangements

Abstract

The present invention provides a method of receiving a timing advance command by a user equipment in a wireless communication system. A terminal receives information on a time advance group from a base station, and also receives the timing advance command corresponding to the time advance group from the base station.

Claims

1. A method of receiving a timing advance command by a user equipment in a wireless communication system, the method comprising:

receiving information regarding a time alignment group from a base station; and

receiving the timing advance command corresponding to the time alignment group from the base station.

2. The method of claim 1, further comprising:

applying the timing advance command to at least one serving cell belonging to the time alignment group.

3. The method of claim 1, wherein the information regarding the time alignment group includes information regarding a time alignment group identifier.

4. The method of claim 1, wherein the timing advance command is received together with the time alignment group identifier.

5. The method of claim 4, wherein the time alignment group identifier is a logical channel identifier.

6. The method of claim 4, wherein the time alignment group identifier is included in a medium access control (MAC) control element (CE).

7. The method of claim 4, wherein the time alignment group identifier is included in a MAC sub-header.

8. The method of claim 1, wherein the time alignment group is determined based on a serving cell in which the timing advance command is received.

9. The method of claim 2, wherein the applying of the timing advance command to the at least one serving cell belonging to the time alignment group comprises restarting an uplink alignment timer for the time alignment group.

10. The method of claim 4, wherein the timing advance command is for uplink time alignment.

11. A method of transmitting a timing advance command by a base station in a wireless communication system, the method comprising:

transmitting information regarding a time alignment group to a user equipment; and

transmitting the timing advance command corresponding to the time alignment group to the user equipment.

12. The method of claim 11, wherein the information regarding the time alignment group includes information regarding a time alignment group identifier.

13. The method of claim 11, wherein the timing advance command is received together with the time alignment group identifier.

14. The method of claim 13, wherein the time alignment group identifier is a logical channel identifier.

15. The method of claim 13, wherein the time alignment group identifier is included in a medium access control (MAC) control element (CE).

16. The method of claim 13, wherein the time alignment group identifier is included in a MAC sub-header.

17. The method of claim 11, wherein the time alignment group is determined based on a serving cell in which the timing advance command is received.

18. The method of claim 13, wherein the timing advance command is for uplink time alignment.