METHOD FOR TRANSMITTING SUB-FRAME DESIGNATION INFORMATION TO A DOWNLINK IN A RADIO COMMUNICATION SYSTEM

• US 20120039232A1
• Filed: 09/12/2011
• Published: 02/16/2012
• Est. Priority Date: 11/11/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kwon, Yeong Hyeon, Noh, Min Seok, Park, Kyu Jin, Chung, Jae Hoon, Han, Seung Hee
• Granted Patent: US 8,493,895 B2
• Time in Patent Office: Days
• US Class Current: 370/312
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A method of transmitting subframe designating information in downlink in a wireless communication system is disclosed. The present invention includes generating the subframe designating information for designating a subframe of a specific type in a radio frame and transmitting the generated subframe designating information to a user equipment, wherein the subframe designating information includes initial location information indicating an initial location of the subframe of the specific type on the radio frame and period information indicating a period for the subframe of the specific type to be repeated.

Claims

1. A method for receiving information by a user equipment (UE) in a wireless communication system, the method comprising:

receiving system information comprising MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframe configuration information from a base station; and

acquiring information for subframes that are allocated for MBSFN within a specific period based on the received MBSFN subframe configuration information,

wherein the UE communicates with the base station using ‘

N’

HARQ (Hybrid Automatic Repeat Request) processes, the ‘

N’

being a first predetermined natural number,

wherein the UE uses predetermined subframes out of ‘

M’

consecutive subframes for a predetermined specific purpose, wherein the predetermined specific purpose comprises at least one of reception of a synchronization channel, reception of a system information block (SIB), and a unicast communication, the ‘

M’

being a second predetermined natural number,

wherein the specific period corresponds to ‘

L’

subframes, and the ‘

L’

corresponds to a least common multiple of the ‘

N’ and

‘

M’

.

2. The method of claim 1, wherein the ‘

N’

is 8, and a minimum amount of subframes before a HARQ retransmission is expected by the UE is 8 subframes.

3. The method of claim 2, wherein the ‘

M’

is 10, and

wherein the UE uses 0^th, 4^th, 5^th, and 9^th subframes out of 10 consecutive subframes for the predetermined specific purpose,

wherein the 10 consecutive subframes constitutes one frame.

4. The method of claim 3, wherein the ‘

L’

is 40.

5. The method of claim 4, wherein the MBSFN subframe configuration information indicates the UE of the subframes that are allocated for MBSFN within 4 consecutive frames using bitmap,

wherein each bit of the bitmap corresponds to 1^st, 2^nd, 3^rd, 6^th, 7^th, and 8^th subframes in sequence of each of the 4 frames.

6. A method for transmitting information by a base station in a wireless communication system, the method comprising:

generating system information comprising MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframe configuration information; and

transmitting the generated system information to one or more user equipments (UEs) to inform the UEs of information for subframes that are allocated for MBSFN within a specific period,

wherein the base station communicates with the UEs using ‘

N’

HARQ (Hybrid Automatic Repeat Request) processes, the ‘

M’

being a first predetermined natural number,

wherein the base station uses predetermined subframes out of ‘

M’

consecutive subframes for a predetermined specific purpose, wherein the predetermined specific purpose comprises at least one of transmitting a synchronization channel, transmitting a system information block (SIB), and a unicast communication, the ‘

M’

being a second predetermined natural number,

wherein the specific period corresponds to ‘

L’

subframes, and the ‘

L’

corresponds to a least common multiple of the ‘

N’ and

the ‘

M’

.

7. The method of claim 6, wherein the ‘

N’

is 8, and

a minimum amount of subframes before a HARQ retransmission is expected by the UEs is 8 subframes.

8. The method of claim 7, wherein the ‘

M’

is 10, and

wherein the base station uses 0^th, 4^th, 5^th, and 9^th subframes out of 10 consecutive subframes for the predetermined specific purpose,

wherein the 10 consecutive subframes constitutes one frame.

9. The method of claim 8, wherein the ‘

L’

is 40.

10. The method of claim 9, wherein the MBSFN subframe configuration information indicates the UEs of the subframes that are allocated for MBSFN within 4 consecutive frames using bitmap,

wherein each bit of the bitmap corresponds to 1^st, 2^nd, 3^rd, 6^th, 7^th, and 8^th subframes in sequence of each of the 4 frames.

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

a RF (Radio Frequency) unit for receiving system information comprising MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframe configuration information from a base station; and

a processing unit, electrically connected to the RF unit, for acquiring information for subframes that are allocated for MBSFN within a specific period based on the received MBSFN subframe configuration information,

wherein the UE communicates with the base station using ‘

N’

HARQ (Hybrid Automatic Repeat Request) processes, the ‘

N’

being a first predetermined natural number,

wherein the UE uses predetermined subframes out of ‘

M’

consecutive subframes for a predetermined specific purpose, wherein the predetermined specific purpose comprises at least one of reception of a synchronization channel, reception of a system information block (SIB), and a unicast communication, the ‘

M’

being a second predetermined natural number,

wherein the specific period corresponds to ‘

L’

subframes, and the ‘

L’

corresponds to a least common multiple of the ‘

N’ and

the ‘

M’

.

12. The UE of claim 11, wherein the ‘

N’

is 8, and

a minimum amount of subframes before a HARQ retransmission is expected by the UE is 8 subframes.

13. The UE of claim 12, wherein the ‘

M’

is 10, and wherein the UE uses 0^th, 4^th, 5^th, and 9^th subframes out of 10 consecutive subframes for the predetermined specific purpose,

wherein the 10 consecutive subframes constitutes one frame.

14. The UE of claim 13, wherein the ‘

L’

is 40.

15. The UE of claim 14, wherein the MBSFN subframe configuration information indicates the UE of the subframes that are allocated for MBSFN within 4 consecutive frames using bitmap,

wherein each bit of the bitmap corresponds to 1^st, 2^nd, 3^rd,6^th, 7^th, and 8^th subframes in sequence of each of the 4 frames.

16. A base station for transmitting information in a wireless communication system, the base station comprising:

a processing unit for generating system information comprising MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframe configuration information; and

a RF (Radio Frequency) unit, electrically connected to the processing unit, for transmitting the generated system information to one or more user equipments (UEs) to inform the UEs of information for subframes that are allocated for MBSFN within a specific period,

wherein the base station communicates with the UEs using ‘

N’

HARQ (Hybrid Automatic Repeat Request) processes, the ‘

N’

being a first predetermined natural number,

wherein the base station uses predetermined subframes out of ‘

M’

consecutive subframes for a predetermined specific purpose, wherein the predetermined specific purpose comprises at least one of transmitting a synchronization channel, transmitting a system information block (SIB), and a unicast communication, the ‘

M’

being a second predetermined natural number,

wherein the specific period corresponds to ‘

L’

subframes, and the ‘

L’

corresponds to a least common multiple of the ‘

N’ and

the ‘

M’

.

17. The base station of claim 16, wherein the ‘

N’

is 8, and

a minimum amount of subframes before a HARQ retransmission is expected by the UEs is 8 subframes.

18. The base station of claim 17, wherein the ‘

M’

is 10, and

wherein the base station uses 0^th, 4^th, 5^th, and 9^th subframes out of 10 consecutive subframes for the predetermined specific purpose,

wherein the 10 consecutive subframes constitutes one frame.

19. The base station of claim 18, wherein the ‘

L’

is 40.

20. The base station of claim 19, wherein the MBSFN subframe configuration information indicates the UEs of the subframes that are allocated for MBSFN within 4 consecutive frames using bitmap,

wherein each bit of the bitmap corresponds to 1^st, 2^nd, 3^rd,6^th, 7^th, and 8^th subframes in sequence of each of the 4 frames.