Data transmission method and data retransmission method

• US 7,826,855 B2
• Filed: 04/29/2009
• Issued: 11/02/2010
• 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: Lee, Young Dae, Chun, Sung Duck, Park, Sung Jun
• Primary Examiner(s): MIZRAHI, DIANE D
• Application Number:
  US12/432,689
• Publication Number:
  US 20090274098A1
• Time in Patent Office: 552 Days
• Field of Search: 370/328, 370/321, 370/352, 370/346, 370/394, 370/473, 370/241, 370/282, 714/749, 455/67.11, 455/452.2, 455/455, 455/464
• US Class Current: 455/455
• 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 providing a status report of a Radio Link Control (RLC) layer in a wireless communication system, the method performed by a receiver and comprising:

starting a timer when at least one missed RLC Protocol Data Unit (PDU) is detected;

stopping the timer when the at least one missed RLC PDU is received from a transmitter while the timer is running;

triggering the status report when the timer expires; and

transmitting the status report to the transmitter, wherein the status report comprises a positive acknowledgement and a negative acknowledgement, the positive acknowledgement corresponding to an RLC PDU having a highest sequence number (SN) among successfully received RLC PDUs, and the negative acknowledgement indicating the at least one missed RLC PDU.

2. The method of claim 1, wherein the positive acknowledgement includes a SN following the SN of the successfully received RLC PDU.

3. The method of claim 1, wherein the negative acknowledgement comprises a SN of the at least one missed RLC PDU.

4. The method of claim 1, wherein the status report is constructed according to a total size of RLC PDUs indicated by a Medium Access Control (MAC) layer.

5. The method of claim 1, wherein the least one missed RLC PDU is detected when a SN following a SN of the RLC PDU with the highest SN among the successfully received RLC PDUs is larger than a SN following a last in-sequence received RLC PDU.

6. The method of claim 1, wherein the timer is stopped when a SN following the SN of the RLC PDU with the highest SN among the successfully received RLC PDUs when the timer was started is the same as a SN following a last in-sequence received RLC PDU.

7. A receiver comprising a Radio Link Control (RLC) entity for providing a status report to a RLC entity of a transmitter, wherein the RLC entity of the receiver is configured to:

start a timer when at least one missed RLC Protocol Data Unit (PDU) is detected;

stop the timer when the at least one missed RLC PDU is received from the transmitter while the timer is running;

trigger the status report when the timer expires; and

transmit the status report to the transmitter, wherein the status report comprises a positive acknowledgement and a negative acknowledgement, the positive acknowledgement corresponding to an RLC PDU having a highest sequence number (SN) among successfully received RLC PDUs, and the negative acknowledgement indicating the at least one missed RLC PDU.

8. The receiver of claim 7, wherein the positive acknowledgement includes a SN following the SN of a successfully received RLC PDU.

9. The receiver of claim 7, wherein the negative acknowledgement comprises a SN of the at least one missed RLC PDU.

10. The receiver of claim 7, wherein the status report is constructed according to a total size of RLC PDUs indicated by a Medium Access Control (MAC) layer.

11. The receiver of claim 7, wherein the least one missed RLC PDU is detected when a SN following a SN of the RLC PDU with the highest SN among the successfully received RLC PDUs is larger than a SN following a last in-sequence received RLC PDU.

12. The receiver of claim 7, wherein the timer is stopped when a SN following a SN of the RLC PDU with the highest SN among the successfully received RLC PDUs when the timer was started is the same as a SN following a last in-sequence received RLC PDU.