METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING DATA ON MULTIPLE CARRIERS IN MOBILE COMMUNICATION SYSTEM

• US 20150043505A1
• Filed: 10/24/2014
• Published: 02/12/2015
• Est. Priority Date: 02/06/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Soenghun, KIM, Sangbum, JANG, Jaehyuk, JEONG, Kyeongin, CHOI, Jongsoo
• Granted Patent: US 9,521,692 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 36/0077 of access information of target access point
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 8/06 Registration at serving network Location Register, VLR or user mobility server
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A data transmission method and an apparatus to communicate data on multiple carriers in the mobile communication system are provided. A random access method of a terminal in a mobile communication system including primary and secondary cells operating on multiple carriers according to the present invention includes communicating data after random access in the primary cell, receiving, when the random access is triggered in the secondary cell, information for use in the secondary cell random access from the primary cell, transmitting a preamble in the secondary cell based on the received information, monitoring the primary cell to receive a Random Access Response for the secondary cell, and applying, when the Random Access Response for the secondary cell is received, the information carried in the Random Access Response to the secondary cell in which the preamble has been transmitted.

Claims

1. A random access method of a terminal in a mobile communication system supporting carrier aggregation, the method comprising:

transmitting a random access preamble on a secondary cell;

receiving a random access response comprising information associated with the secondary cell on a primary cell; and

transmitting data according to the information on the secondary cell.

2. The method of claim 1, further comprising:

receiving system information comprising information associated with the primary cell or the secondary cell.

3. The method of claim 2, wherein the system information comprises a duration of a random access response window for the primary cell or the secondary cell, and a maximum number of preamble transmissions for the primary cell.

4. The method of claim 1, further comprising:

receiving a higher layer message comprising a maximum number of preamble transmissions for the secondary cell, random access transmission resource information for the secondary cell, and a maximum number of transmissions for uplink hybrid automatic repeat request (HARQ) for the secondary cell.

5. The method of claim 1, wherein the receiving of the random access response comprises:

monitoring a control channel of the primary cell to receive the random access response identified by a random access radio network temporary identifier (RA-RNTI).

6. The method of claim 1, wherein the receiving of the random access response comprises:

monitoring a control channel of the primary cell to receive the random access response based on random access response window size information included in system information transmitted from the primary cell.

7. The method of claim 1, wherein the receiving of the random access response comprises:

determining that the random access response is received if the random access response contains a random access preamble identifier corresponding to the transmitted random access preamble.

8. The method of claim 1, wherein the information associated with the secondary cell comprises at least one of uplink resource allocation information (UL grant) and timing advance command information.

9. A terminal for performing a random access in a mobile communication system supporting carrier aggregation, the terminal comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to control transmitting a random access preamble to a secondary cell, receiving a random access response comprising information associated with the secondary cell on a primary cell, and transmitting data according to the information on the secondary cell.

10. The terminal of claim 9, wherein the controller is configured to control to receive system information comprising information associated with the primary cell or the secondary cell.

11. The terminal of claim 10, wherein the system information comprises a duration of a random access response window for the primary cell or the secondary cell, and a maximum number of preamble transmissions for the primary cell.

12. The terminal of claim 9, wherein the controller is configured to control to receive a higher layer message comprising a maximum number of preamble transmissions for the secondary cell, random access transmission resource information for the secondary cell, and a maximum number of transmissions for uplink hybrid automatic repeat request (HARQ) for the secondary cell.

13. The terminal of claim 9, wherein the controller is configured to control to monitor a control channel of the primary cell to receive the random access response identified by a random access radio network temporary identifier (RA-RNTI).

14. The terminal of claim 9, wherein the controller is configured to control to monitor a control channel of the primary cell to receive the random access response based on random access response window size information included in system information transmitted from the primary cell.

15. The terminal of claim 9, wherein the controller is configured to control to determine that the random access response is received if the random access response contains a random access preamble identifier corresponding to the transmitted random access preamble.

16. The terminal of claim 9, wherein the information associated with the secondary cell comprises at least one of uplink resource allocation information (UL grant) and timing advance command information.

17. A base station for supporting a random access in a mobile communication system supporting carrier aggregation, the base station comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to control receiving a random access preamble on the secondary cell from a terminal, transmitting a random access response comprising information associated with the secondary cell on a primary cell to the terminal, and receiving data according to the information on the secondary cell.

18. The base station of claim 17, wherein the controller is configured to control to transmit system information comprising information associated with the primary cell or the secondary cell.

19. The base station of claim 18, wherein the system information comprises a duration of a random access response window for the primary cell or the secondary cell, and a maximum number of preamble transmissions for the primary cell.

20. The base station of claim 17, wherein the controller is configured to control to transmit a higher layer message comprising a maximum number of preamble transmissions for the secondary cell, random access transmission resource information for the secondary cell, and a maximum number of transmissions for uplink hybrid automatic repeat request (HARQ) for the secondary cell,

wherein a control channel of the primary cell is monitored by the terminal to receive the random access response identified by a random access radio network temporary identifier (RA-RNTI),

wherein a control channel of the primary cell is monitored by the terminal to receive the random access response based on random access response window size information included in system information transmitted from the primary cell,

wherein the terminal determines that the random access response is received if the random access response contains a random access preamble identifier corresponding to the transmitted random access preamble, and

wherein the information associated with the secondary cell comprises at least one of uplink resource allocation information (UL grant) or timing advance command information.