Data Transmission Method and Data Re-Transmission Method

• US 20080298322A1
• Filed: 01/03/2007
• Published: 12/04/2008
• Est. Priority Date: 01/05/2006
• Status: Active Grant

• Current Assignee: S.I.Sv.El. Societa' Italiana Per Lo Sviluppo Dell'Elettronica S.P.A. (Fineur International S.A.)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sung Jun, Lee, Young Dae, Chun, Sung Duck
• Granted Patent: US 7,869,396 B2
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: H04L 1/1635 Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1838 for semi-reliable protocols, e.g. for less sensitive applications such as streaming video buffer level management for video bitstream receiver H04N21/44004
• CPC Class Codes: H04L 1/1851 using multiple timers
• CPC Class Codes: H04L 1/1877 for semi-reliable protocols, e.g. for less sensitive applications like streaming video buffer level management for video bitstream control arrangements H04N21/44004
• CPC Class Codes: H04L 1/1883 using multiple timers
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 69/03 Protocol definition or specification protocol conformance testing H04L1/244
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06
• CPC Class Codes: H04W 80/02 Data link layer protocols

Abstract

A method which can reduce loss in data transmission is provided. A data block is prepared in a high-level layer and the data block is transmitted in a low-level layer. Status report information associated with reception or non-reception of the data block is received through the low-level layer. When a receiver fails to receive data transmitted from a transmitter, the transmitter can rapidly recognize the reception failure and can retransmit the data.

Claims

1. A method of transmitting data in a wireless communication system, comprising:

preparing a data block in a high-level layer;

transmitting the data block in a low-level layer; and

receiving status report information associated with reception or non-reception of the data block through the low-level layer.

2. The method of claim 1, wherein the high-level layer is a RLC (Radio Link Control) layer.

3. The method of claim 1, wherein the low-level layer is a physical layer.

4. The method of claim 1, wherein the status report information is transmitted through a channel through which scheduling information indicating assignment of physical resources is transmitted.

5. The method of claim 1, wherein the status report information is based on a sequence number of the data block.

6. The method of claim 1, further comprising:

transmitting status request information indicating a request for the status report information before the high-level layer receives the status report information.

7. The method of claim 1, wherein the status report information is included in a header of the data block.

8. The method of claim 1, wherein the data block is a RLC PDU (Protocol Data Unit).

9. The method of claim 1, wherein the data block is a MAC (Medium Access Control) PDU.

10. A method of transmitting data, comprising:

preparing a RLC PDU in a RLC layer;

transmitting the RLC PDU using a HARQ (Hybrid Automatic Repeat Request) in a physical layer;

receiving status report information associated with reception or non-reception of the RLC PDU; and

determining whether the RLC PDU should be retransmitted on the basis of the status report information.

11. The method of claim 10, wherein the status report information is transmitted by a physical layer of a receiver which receives the RLC PDU.

12. The method of claim 11, further comprising:

reporting a reception failure to a RRC (Radio Resource Control) layer when retransmissions of the RLC PDU are failed by a preset number of times.

13. A method of retransmitting data comprising:

retransmitting a data block through an HARQ by a preset number of times in a physical layer;

reporting a reception of a NACK (Not ACKnowledgement) signal to a RLC layer when receiving the NACK signal by the maximum allowable number of times; and

determining whether the data block should be retransmitted.

14. The method of claim 13, wherein the NACK signal does not pass through a RLC layer of a receiver which transmits the NACK signal.

15. The method of claim 13, further comprising:

receiving status report information through the physical layer, wherein whether the data block should be retransmitted is determined on the basis of the status report information.