METHOD FOR PROCESSING MAC PROTOCOL DATA UNIT IN A WIRELESS COMMUNICATION SYSTEM

• US 20110164560A1
• Filed: 12/20/2010
• Published: 07/07/2011
• Est. Priority Date: 01/07/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ki, Sun Hee, Park, Sung Jun, Yi, Seung June, Jung, Sung Hoon, Chun, Sung Duck
• Granted Patent: US 8,422,505 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04L 1/1874 Buffer management
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 80/02 Data link layer protocols

Abstract

A method and apparatus for processing a MAC PDU in a wireless communication system are disclosed. The method includes segmenting a MAC PDU into a first MAC PDU segment and a second MAC PDU segment, transmitting the first MAC PDU segment to a receiver, and discarding the second MAC PDU segment not to be transmitted to the receiver, if the transmission of the first MAC PDU segment is failed.

Claims

1. A method for processing a Medium Access Control (MAC) Protocol Data Unit (PDU) at a MAC layer of a transmitter in a wireless communication system, the method comprising:

segmenting a MAC PDU into a first MAC PDU segment and a second MAC PDU segment;

transmitting the first MAC PDU segment to a receiver; and

discarding the second MAC PDU segment that has not been transmitted to the receiver, if the transmission of the first MAC PDU segment is failed.

2. The method according to claim 1, wherein the segmentation comprises segmenting the MAC PDU according to an amount of available resources.

3. The method according to claim 2, wherein the available resources are determined according to a Transport Block (TB) size.

4. The method according to claim 3, wherein the available resources are determined according to space of the TB determined by a selected Transport Format Combination (TFC).

5. The method according to claim 1, further comprising storing the second MAC PDU segment.

6. The method according to claim 1, further comprising discarding the first MAC PDU segment.

7. The method according to claim 1, further comprising receiving an indication indicating that a Radio Link Control (RLC) Service Data Unit (SDU) related to the MAC PDU has been discarded from an RLC layer, wherein the discarding step comprises discarding the second MAC PDU segment according to the indication.

8. The method according to claim 7, wherein the RLC SDU is discarded based on a discard timer, Timer_Discard.

9. A transmitter including a Medium Access Control (MAC) layer in a wireless communication system, the transmitter comprising:

a segmentation entity for segmenting a MAC PDU into a first MAC PDU segment and a second MAC PDU segment; and

a transmission entity for transmitting the first MAC PDU segment to a receiver,

wherein if the transmission of the first MAC PDU segment is failed, the second MAC PDU segment that has not been transmitted to the receiver is discarded.

10. The transmitter according to claim 9, wherein the segmentation entity segments the MAC PDU according to an amount of available resources.

11. The transmitter according to claim 10, wherein the available resources are determined according to a Transport Block (TB) size.

12. The transmitter according to claim 11, wherein the available resources are determined according to space of the TB determined by a selected Transport Format Combination (TFC).

13. The transmitter according to claim 9, wherein the transmission entity is a Hybrid Automatic Repeat reQuest (HARQ) entity and the HARQ entity stores the second MAC PDU segment.

14. The transmitter according to claim 9, wherein if the transmission of the first MAC PDU segment is failed, the first MAC PDU segment is discarded.

15. The transmitter according to claim 9, wherein upon receipt of an indication indicating that a Radio Link Control (RLC) Service Data Unit (SDU) related to the MAC PDU has been discarded from an RLC layer, the MAC layer discards the second MAC PDU segment.

16. The transmitter according to claim 15, wherein the RLC SDU is discarded based on a discard timer, Timer_Discard.