Method and apparatus for processing padding buffer status reports

• US 7,751,444 B2
• Filed: 02/19/2009
• Issued: 07/06/2010
• Est. Priority Date: 02/20/2008
• Status: Active Grant

• Current Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Seung-June, Park, Sung-Jun, Lee, Young-Dae, Chun, Sung-Duck
• Primary Examiner(s): MARCELO, MELVIN C
• Application Number:
  US12/379,375
• Publication Number:
  US 20090232018A1
• Time in Patent Office: 502 Days
• Field of Search: 370/474, 370/522, 370/528
• US Class Current: 370/474
• CPC Class Codes: H04L 69/32 Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 80/02 Data link layer protocols

Abstract

A method and system for processing buffer status reports (BSRs) such that when BSR triggering is performed, the size(s) of the necessary sub-header(s) are also to be considered together in addition to the BSR size. The steps of checking whether any padding region is available in a MAC PDU that was constructed, comparing the number of padding bits with the size of the BSR plus its sub-header, and if the number of padding bits is larger than the size of the BSR plus its sub-header, triggering BSR are performed. Doing so allows the sub-header(s) to be inserted or included into the MAC PDU or transport block (TB) or other type of data unit.

Claims

1. A method of processing a padding buffer status report (BSR) in mobile communication system, the method comprising:

checking, by a mobile terminal, whether any padding region is available in a constructed Medium Access Control (MAC) Protocol Data Unit (PDU);

comparing, by the mobile terminal, number of padding bits with a size of the BSR plus its related sub-header; and

if the number of padding bits is larger than or equal to the size of the BSR plus its related sub-header, triggering BSR.

2. The method of claim 1, further comprising:

receiving, by the mobile terminal, a grant from a network to construct the MAC PDU; and

constructing, by the mobile terminal, the MAC PDU by using higher logical channel data and MAC control elements.

3. The method of claim 2, wherein the MAC PDU includes a short BSR having a logical channel group identification (LCGID) field of 2 bits and a buffer size of 6 bits.

4. The method of claim 1, wherein a logical channel identification (LCID) field identifies the logical channel instance of the corresponding MAC SDU or the type of the corresponding MAC control element or padding for the DL-SCH and UL-SCH respectively.

5. The method of claim 1, wherein a logical channel identification (LCID) field is included in the sub-header to indicate the BSR is included, and wherein the LCID field contains either a first value for a short buffer status report or a second value for a long buffer status report.

6. The method of claim 1, wherein the size of the BSR is 1 byte or 3 bytes.

7. A medium access control (MAC) entity of a mobile terminal in mobile communication system, the MAC entity comprising:

a checking unit that checks whether any padding region is available in a constructed Medium Access Control (MAC) Protocol Data unit (PDU);

a comparing unit that compares number of padding bits with the size of a buffer status report (BSR) plus its related sub-header; and

a processing unit that cooperates with the checking unit and the comparing unit to trigger a buffer status report (BSR) if the number of padding bits is larger than or equal to the size of the BSR plus its related sub-header.

8. The MAC entity of claim 7, the processing unit further performs the steps of:

receiving a grant from a network to construct the MAC PDU; and

constructing the MAC PDU by using higher logical channel data and MAC control elements.

9. The MAC entity of claim 8, wherein the MAC PDU includes a short BSR having a logical channel group identification (LCGID) field of 2 bits and a buffer size of 6 bits.

10. The MAC entity of claim 7, wherein a logical channel identification (LCID) field identifies the logical channel instance of the corresponding MAC SDU or the type of the corresponding MAC control element or padding for the DL-SCH and UL-SCH respectively.

11. The MAC entity of claim 7, wherein a logical channel identification (LCID) field is included in the sub-header to indicate the BSR is included, and wherein the LCID field contains either a first value for a short buffer status report or a second value for a long buffer status report.

12. The MAC entity of claim 7, wherein the size of the BSR is 1 byte or 3 bytes.