METHOD FOR RETRANSMITTING DATE IN THE MULTI-CARRIER SYSTEM

• US 20100157916A1
• Filed: 10/02/2007
• Published: 06/24/2010
• Est. Priority Date: 10/02/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Ki Jun, Yun, Young Woo, Kim, Eun Sun, Yoon, Suk Hyon, Kim, Hak Seong, Lee, Dae Won, Ahn, Joon Kul
• Granted Patent: US 8,107,394 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1874 Buffer management
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 2001/125 Arrangements for preventing errors in the return channel
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems

Abstract

A method for modifying a synchronous non-adaptive retransmission scheme to solve the limitation of the synchronous non-adaptive retransmission scheme is disclosed. A method for indicating not only the new data transmission but also the retransmission using a data scheduling message is disclosed. A method for determining whether there is an error in the ACK signal transmitted from a data reception end using another message to-be received later is disclosed. The retransmission method for a multi-carrier system includes: receiving a grant message including scheduling information for transmitting uplink data wherein a retransmission scheme for the uplink data is predetermined by a first retransmission scheduling, transmitting the uplink data according to the scheduling information and retransmitting the uplink data according to second retransmission scheduling by receiving the second retransmission scheduling information associated with the uplink data with retransmission request.

Claims

1-16. -16. (canceled)

17. A method of data retransmission in a multi carrier system, the method comprising:

receiving a first grant message including first resource allocation information for an uplink data transmission and a first new data indicator (NDI) indicating whether a new data is transmitted or the uplink data is retransmitted;

transmitting the uplink data using the first resource allocation information;

receiving an acknowledgement message for the uplink data; and

maintaining the uplink data in a buffer until a predetermined condition is satisfied even though the acknowledgment message is a positive acknowledgement signal (ACK).

18. The method according to claim 17, further comprising:

receiving a second grant message including a second resource allocation information for an uplink data transmission and a second NDI,

wherein the acknowledgment message is determined to a negative acknowledgement signal (NACK) when the second NDI is not toggled compared with the first NDI.

19. The method according to claim 18, wherein the acknowledgement message is determined to have an error when the acknowledgement message is determined to a positive acknowledgement signal (ACK) and the second NDI is not toggled compared to the first NDI.

20. The method according to claim 18, wherein the second grant message further includes redundancy version information for the data retransmission.

21. The method according to claim 18, wherein the first resource allocation information includes at least one of a first transmission timing, a first transmission resource block, a number of the first transmission resource block, and a first MCS (Modulation and Coding Scheme) information,

the second resource allocation information includes at least one of a second transmission timing, a second resource block, a number of the second transmission resource block, and a second MCS (Modulation and Coding Scheme) information.

22. An User Equipment (UE) performing a method of data retransmission in a multi carrier system, the UE comprises:

a transmission module controlling an uplink data transmission;

a receiving module controlling a message and a signal used at the data retransmission method; and

a processor controlling the transmission module and the receiving module to perform the method for the data retransmission,

wherein the processor performs the steps of;

receiving a first grant message including first resource allocation information for an uplink data transmission and a first new data indicator (NDI) indicating whether a new data is transmitted or the uplink data is retransmitted;

transmitting the uplink data using the first resource allocation information;

receiving an acknowledgement message for the uplink data; and

maintaining the uplink data in a buffer until a predetermined condition is satisfied even though the acknowledgment message is a positive acknowledgement signal (ACK), using the transmission module and the receiving module.

23. The UE according to claim 22, wherein the processor further performs the step of:

receiving a second grant message including second resource allocation information and a second NDI,

wherein the processor determines the acknowledge message to a negative acknowledgement signal (NACK) when the second NDI is toggled compared to the first NDI.

24. The UE according to claim 23, wherein the processor determines the acknowledgement message has an error when the acknowledgement message is determined to a positive acknowledgement signal (ACK) and the second NDI is not toggled compared to the first NDI.

25. The UE according to claim 23, wherein the second grant message further includes redundancy version information for the data retransmission.

26. The UE according to claim 22, wherein the first resource allocation information includes at least one of a first transmission timing, a first transmission resource block, a number of the first transmission resource block, and a first MCS (Modulation and Coding Scheme) information,

the second resource allocation information includes at least one of a second transmission timing, a second resource block, a number of the second transmission resource block, and a second MCS (Modulation and Coding Scheme) information.