Method and apparatus for processing padding buffer status reports

• US 8,934,502 B2
• Filed: 05/21/2013
• Issued: 01/13/2015
• 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: Chun, Sung Duck, Yi, Seung June, Park, Sung Jun, Lee, Young Dae
• Primary Examiner(s): Javaid, Jamal
• Application Number:
  US13/899,186
• Publication Number:
  US 20130272319A1
• Time in Patent Office: 602 Days
• Field of Search: 370/328, 370/474, 370/252, 370/528, 370/329, 370/331, 370/338, 370/330, 710/56, 710/53, 710/55
• 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 constructing a medium access control protocol data unit (MAC PDU) to include a buffer status report (BSR), the method comprising:

determining whether any padding bits are available in the MAC PDU;

if a number of padding bits is equal to or larger than a size of a Short BSR plus its sub-header but smaller than a size of a Long BSR plus its sub-header and if more than one Logical Channel Group (LCG) has buffered data, triggering the BSR; and

including the triggered BSR in the MAC PDU,

wherein the MAC PDU contains a Logical Channel ID (LCID) field and the triggered BSR,

wherein the triggered BSR is indicated explicitly in the LCID field by using a specific value that is different from any values of the LCID field for a short BSR and a long BSR, and

wherein the triggered BSR has a format that is equivalent to the short BSR.

2. The method of claim 1, wherein the triggered BSR is located anywhere within the MAC PDU.

3. The method of claim 1, wherein a format of the triggered BSR has 2 bits of Logical Channel Group ID (LCG ID) field and 6 bits of buffer size field.

4. The method of claim 1, wherein the specific value indicates that there is data associated with more than one logical channel.

5. The method of claim 1, wherein the MAC PDU further includes a header, one or more control elements, or one or more MAC service data units (SDUs).

6. The method of claim 5, wherein the one or more control elements are placed before the one or more MAC SDUs.

7. The method of claim 1, wherein the header includes a plurality of sub-headers, and the each of the plurality of sub-headers corresponds to the one or more MAC SDUs.

8. The method of claim 1, wherein the logical channel identification (LCID) field has 5 bits.

9. The method of claim 1, wherein the 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.

10. A mobile communication apparatus comprising:

a protocol entity adapted to determine whether any padding bits are available in the MAC PDU, to trigger a buffer status report (BSR) if a number of padding bits is equal to or larger than a size of a Short BSR plus its sub-header but smaller than a size of a Long BSR plus its sub-header and if more than one Logical Channel Group (LCG) has buffered data, and to include the triggered BSR in the MAC PDU,

wherein the MAC PDU contains a Logical Channel ID (LCID) field and the triggered BSR,

wherein the triggered BSR is indicated explicitly in the LCID field by using a specific value that is different from any values of the LCID field for a short BSR and a long BSR, and

wherein the triggered BSR has a format that is equivalent to the short BSR.

11. The mobile communication apparatus of claim 10, wherein the triggered BSR is located anywhere within the MAC PDU.

12. The mobile communication apparatus of claim 10, wherein a format of the triggered BSR has 2 bits of Logical Channel Group ID (LCG ID) field and 6 bits of buffer size field.

13. The mobile communication apparatus of claim 10, wherein the specific value indicates that there is data associated with more than one logical channel.

14. The mobile communication apparatus of claim 10, wherein the MAC PDU further includes a header, one or more control elements, or one or more MAC service data units (SDUs).

15. The mobile communication apparatus of claim 14, wherein the one or more control elements are placed before the one or more MAC SDUs.

16. The mobile communication apparatus of claim 10, wherein the header includes a plurality of sub-headers, and the each of the plurality of sub-headers corresponds to the one or more MAC SDUs.

17. The mobile communication apparatus of claim 10, wherein the logical channel identification (LCID) field has 5 bits.

18. The mobile communication apparatus of claim 10, wherein the 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.