Data transmission method and data re-transmission method

• US 7,869,396 B2
• Filed: 01/03/2007
• Issued: 01/11/2011
• 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: Chun, Sung Duck, Lee, Young Dae, Park, Sung Jun
• Primary Examiner(s): MIZRAHI, DIANE D
• Application Number:
  US12/158,646
• Publication Number:
  US 20080298322A1
• Time in Patent Office: 1,469 Days
• Field of Search: 370/231, 370/328, 370/352, 370/346, 370/394, 370/473, 370/241, 370/282, 370/321, 714/749, 455/67.11, 455/452.2, 455/455, 455/464
• US Class Current: 370/328
• 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 when the at least one data block is received from the transmitter while the timer is running, in order to prevent a triggering of a status report before the timer expires; and

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

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

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

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

8. A receiver for performing automatic repeat request (ARQ) in a wireless communication system, the receiver comprising a Radio Link Control (RLC) entity, wherein the RLC entity is 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 when the at least one data block is received from the transmitter while the timer is running, in order to prevent a triggering of a status report before the timer expires; and

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

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

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