Data transmission method and data re-transmission method

• US 8,165,596 B2
• Filed: 12/06/2010
• Issued: 04/24/2012
• 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, Park, Sung Jun, Chun, Sung Duck
• Primary Examiner(s): Mizrahi, Diane
• Application Number:
  US12/961,451
• Publication Number:
  US 20110093754A1
• Time in Patent Office: 505 Days
• Field of Search: 455/67.11, 455/452.2, 455/455, 455/464, 370/241, 370/282, 370/321, 370/328, 370/352, 370/394, 370/473, 714/749
• US Class Current: 455/452.2
• 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 performing automatic repeat request (ARQ) in a wireless communication system, the method performed by a receiver and comprising:

detecting whether at least one data block to be received from a transmitter is missed;

starting a timer when the at least one data block is detected as missed;

stopping the timer if the at least one data block detected as missed is received from the transmitter while the timer is running; and

transmitting a status report to the transmitter if the timer expires, wherein the status report comprises a positive acknowledgement indicating receipt of at least one data block.

2. The method of claim 1, wherein the at least one data block is detected as missed if a sequence number (SN) of a currently received data block is larger than an SN of a previously received data block.

3. The method of claim 1, wherein the at least one data block is detected as missed if a sequence number (SN) following an SN of a data block with a highest SN among received data blocks is larger than a lowest SN of the at least one data block to be received.

4. The method of claim 1, wherein the at least one data block is detected as missed if a sequence number (SN) following an SN of a data block with a highest SN among received data blocks is larger than an SN following a last in-sequence received data block.

5. The method of claim 1, wherein the timer is stopped if a sequence number (SN) following an SN of a data block with a highest SN among received data blocks when the timer was started is the same as an SN following the last in-sequence received data block.

6. The method of claim 1, wherein the at least one data block comprises a Radio Link Control (RLC) Protocol Data Unit (PDU).

7. The method of claim 1, wherein the status report further comprises a negative acknowledgement indicating a sequence number (SN) of the at least one data block detected as missed.

11. The method of claim 1, further comprising stopping the timer only if all of the at least one data block detected as missed is received from the transmitter while the timer is running

8. A receiver performing automatic repeat request (ARQ) in a wireless communication system, the receiver comprising a Radio Link Control (RLC) entity configured to:

detect whether at least one data block to be received from a transmitter is missed;

start a timer when the at least one data block is detected as missed;

stop the timer if the at least one data block detected as missed is received from the transmitter while the timer is running; and

transmit a status report to the transmitter if the timer expires, wherein the status report comprises a positive acknowledgement indicating receipt of at least one data block.

9. The receiver of claim 8, wherein the at least one data block is detected as missed if a sequence number (SN) following an SN of a data block with a highest SN among received data blocks is larger than an SN following a last in-sequence received data block.

10. The receiver of claim 8, wherein the timer is stopped if a sequence number (SN) following an SN of a data block with a highest SN among received data blocks when the timer was started is the same as an SN following the last in-sequence received data block.

12. The receiver of claim 8, wherein the RLC entity is further configured to stop the timer only if all of the at least one data block detected as missed is received from the transmitter while the timer is running.