Method and apparatus for receiving a timing advance command in a wireless communication system

• US 10,462,697 B2
• Filed: 02/15/2019
• Issued: 10/29/2019
• 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
• Primary Examiner(s): Zhao, Wei
• Application Number:
  US16/277,084
• Publication Number:
  US 20190182692A1
• Time in Patent Office: 256 Days
• 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 tuning 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, from a base station, the timing advance command corresponding to a time alignment group; and

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

wherein a time alignment group identifier identifies the time alignment group to which the timing advance command is applied,

wherein the time alignment group identifier is included in a medium access control (MAC) control element (CE),

wherein the MAC CE includes the time alignment group identifier together with the timing advance command, and

wherein a length of field for the time alignment group identifier is 2 bits and a length of field for the timing advance command is 6 bits.

2. The method of claim 1, wherein the time alignment group identifier is a time advance group identifier or a logical channel identifier.

3. The method of claim 1, wherein the applying of the received 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.

4. The method of claim 1, wherein the timing advance command is used for an uplink time alignment.

13. The method of claim 1, wherein a field for the timing advance command within the MAC CE is separately located from a field for the time alignment group identifier within the MAC CE.

14. The method of claim 1, wherein a field for the timing advance command within the MAC CE is located after a field for the time alignment group identifier within the MAC CE.

15. The method of claim 1, wherein the timing advance command is received together with the time alignment group identifier after receiving information related to the time alignment group.

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

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

wherein a time alignment group identifier identifies the time alignment group to which the timing advance command is applied, and

wherein the time alignment group identifier is included in a medium access control (MAC) control element (CE),

wherein the MAC CE includes the time alignment group identifier together with the timing advance command, and

wherein a length of field for the time alignment group identifier is 2 bits and a length of field for the timing advance command is 6 bits.

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

7. The method of claim 5, wherein the time alignment group is determined based on a serving cell in which the timing advance command is transmitted.

8. The method of claim 5, wherein the timing advance command is for uplink time alignment.

16. The method of claim 5, wherein a field for the timing advance command within the MAC CE is separately located from a field for the time alignment group identifier within the MAC CE.

17. The method of claim 5, wherein a field for the timing advance command within the MAC CE is located after a field for the time alignment group identifier within the MAC CE.

18. The method of claim 5, wherein the timing advance command is transmitted together with the time alignment group identifier after transmitting information related to the time alignment group.

9. A User Equipment (UE) for receiving a timing advance command in a wireless communication system, the UE comprising:

a transceiver configured to transmit or receive data;

a memory configured to store the data; and

a processor configured to cooperate with the transceiver and the memory to;

receive the timing advance command corresponding to a time alignment group from a base station; and

apply the received timing advance command to at least one serving cell belonging to the time alignment group,

wherein a time alignment group identifier identifies the time alignment group to which the timing advance command is applied,

wherein the time alignment group identifier is included in a medium access control (MAC) control element (CE),

wherein the MAC CE includes the time alignment group identifier together with the timing advance command, and

wherein a length of field for the time alignment group identifier is 2 bits and a length of field for the timing advance command is 6 bits.

10. The UE of claim 9, wherein the time alignment group identifier is a time advance group identifier or a logical channel identifier.

11. The UE of claim 9, wherein the applying of the received 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.

12. The UE of claim 9, wherein the timing advance command is used for an uplink time alignment.

19. The UE of claim 9, wherein a field for the timing advance command within the MAC CE is separately located from a field for the time alignment group identifier within the MAC CE.

20. The UE of claim 9, wherein a field for the timing advance command within the MAC CE is located after a field for the time alignment group identifier within the MAC CE.

21. The UE of claim 9, wherein the timing advance command is received together with the time alignment group identifier after receiving information related to the time alignment group.