Transmitting data in a mobile communication system

• US 8,340,026 B2
• Filed: 06/09/2010
• Issued: 12/25/2012
• Est. Priority Date: 01/05/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young Dae, Chun, Sung Duck, Jung, Myung Cheul, Park, Sung Jun
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US12/797,576
• Publication Number:
  US 20100290400A1
• Time in Patent Office: 930 Days
• Field of Search: 370/328, 370/329, 370/474, 370/476, 370/469
• US Class Current: 370/328
• CPC Class Codes: H04L 1/1621 Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/18 End to end
• CPC Class Codes: H04L 47/34 ensuring sequence integrity, e.g. using sequence numbers
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention is related to transmitting data in a mobile communication system. Preferably, the present invention comprises transmitting first data to a receiving side and receiving acknowledgment information for indicating whether the first data was successfully transmitted to the receiving side. If the first data was not successfully transmitted to the receiving side, the method further comprises determining whether an amount of available radio resources is sufficient for retransmitting the first data to the receiving side, retransmitting the first data to the receiving side if the amount of available radio resources is sufficient to retransmit the first data, reconfiguring the first data into at least one second data if the amount of available radio resources is insufficient to retransmit the first data, wherein the at least one second data can be transmitted to the receiving side using the amount of available radio resources, and transmitting the at least one second data to the receiving side.

Claims

1. A method for retransmitting a protocol data unit (PDU) to a receiving side by a transmitting side in a mobile communication system, the method comprising:

delivering a first PDU to a lower layer if the first PDU entirely fits within a predetermined size of a PDU;

segmenting the first PDU to form a second PDU which fits within the predetermined size and delivering the second PDU to the lower layer if the first PDU does not fit within the predetermined size; and

transmitting the first PDU or the second PDU to the receiving side,

wherein segmenting the first PDU to form the second PDU comprises;

mapping only a data field of the first PDU to a data field of the second PDU; and

setting a header of the second PDU.

2. The method of claim 1, wherein the header of the second PDU includes a field indicating a position of the second PDU within the first PDU.

3. The method of claim 1, wherein the header of the second PDU includes a field indicating a starting position of the second PDU within the first PDU.

4. The method of claim 1, wherein the header of the second PDU includes a field indicating whether or not the second PDU is a last segmented PDU within the first PDU.

5. The method of claim 1, wherein the predetermined size is indicated by the lower layer.

6. The method of claim 1, wherein the header of the second PDU includes a field indicating that the corresponding second PDU is segmented.

7. An apparatus for retransmitting a protocol data unit (PDU) to a receiving side in a mobile communication system, the apparatus comprising:

means for delivering a first PDU to a lower layer if the first PDU entirely fits within a predetermined size of a PDU;

means for segmenting the first PDU to form a second PDU which fits within the predetermined size and delivering the second PDU to the lower layer if the first PDU does not fit within the predetermined size; and

means for transmitting the first PDU or the second PDU to the receiving side,

wherein the means for segmenting the first PDU comprises means for mapping only a data field of the first PDU to a data field of the second PDU and means for setting a header of the second PDU.

8. The apparatus of claim 7, wherein the header of the second PDU includes a field indicating a position of the second PDU within the first PDU.

9. The apparatus of claim 7, wherein the header of the second PDU includes a field indicating a starting position of the second PDU within the first PDU.

10. The apparatus of claim 7, wherein the header of the second PDU includes a field indicating whether or not the second PDU is a last segmented PDU within the first PDU.

11. The apparatus of claim 7, wherein the predetermined size is indicated by the lower layer.

12. The apparatus of claim 7, wherein the header of the second PDU includes a field indicating that the corresponding second PDU is segmented.