DATA TRANSMISSION METHOD AND DATA RE-TRANSMISSION METHOD

• US 20110093754A1
• Filed: 12/06/2010
• Published: 04/21/2011
• 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: Park, Sung Jun, Lee, Young Dae, Chun, Sung Duck
• Granted Patent: US 8,165,596 B2
• Time in Patent Office: Days
• US Class Current: 714/748
• 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

1-15. -15. (canceled)

16. A method of communication performed by a receiver in a wireless communication system, the method comprising:

receiving at least one data block at a Medium Access Control (MAC) layer by using Hybrid Automatic Repeat Request (HARQ);

delivering the at least one data block from the MAC layer to a Radio Link Control (RLC) layer;

constructing an RLC Protocol Data Unit (PDU) from the at least one data block;

placing the RLC PDU in a reception buffer if a Sequence Number (SN) of the RLC PDU is within a reception window;

updating the reception window if the RLC PDU is placed in the reception buffer; and

stopping a timer if the reception window is moved while the timer is running,

wherein the timer is started if at least one RLC PDU in the reception window is detected as missed.

17. The method of claim 16, further comprising moving the reception window if a lower edge of the reception window is updated as a new SN.

18. The method of claim 17, wherein the lower edge of the reception window is an SN following a last in-sequence completely received RLC PDU.

19. The method of claim 17, wherein the new SN is equal to an SN following an SN of an RLC PDU with a highest SN among received RLC PDUs when the timer is started.

20. The method of claim 19, wherein the new SN is an SN following the SN of the RLC PDU placed in the reception buffer.

21. The method of claim 16, wherein the reception window is not moved if an SN following the SN of the RLC PDU placed in the reception buffer is equal to an SN following an SN of an RLC PDU with a highest SN among received RLC PDUs when the timer is started.

22. The method of claim 16, further comprising:

transmitting a status report for Automatic Repeat Request (ARQ) to a transmitter after the timer expires.

23. A receiver in a wireless communication system, the receiver comprising a Medium Access Control (MAC) entity and a Radio Link Control (RLC) entity,

wherein the MAC entity is configured to:

receive at least one data block by using Hybrid Automatic Repeat Request (HARQ); and

deliver the at least one data block to the RLC entity; and

wherein the RLC entity is configured to;

construct an RLC Protocol Data Unit (PDU) from the at least one data block;

place the RLC PDU in a reception buffer if a Sequence Number (SN) of the RLC PDU is within a reception window;

update the reception window if the RLC PDU is placed in the reception buffer; and

stop a timer if the reception window is moved while the timer is running, wherein the timer is started if at least one RLC PDU in the reception window is detected as missed.

24. The receiver of claim 23, wherein the reception window is moved if a lower edge of the reception window is updated as a new SN.

25. The receiver of claim 24, wherein the lower edge of the reception window is an SN following a last in-sequence completely received RLC PDU.

26. The receiver of claim 24, wherein the new SN is equal to an SN following an SN of an RLC PDU with a highest SN among received RLC PDUs when the timer is started.

27. The receiver of claim 26, wherein the new SN is an SN following the SN of the RLC PDU placed in the reception buffer.

28. The receiver of claim 23, wherein the reception window is not moved if an SN following the SN of the RLC PDU placed in the reception buffer is not equal to an SN following an SN of an RLC PDU with a highest SN among received RLC PDUs when the timer is started.

29. The receiver of claim 23, wherein the RLC entity is further configured to transmit a status report for Automatic Repeat Request (ARQ) to a transmitter after the timer expires.