OPTIMIZED HEADER FOR EFFICIENT PROCESSING OF DATA PACKETS

• US 20100157904A1
• Filed: 12/21/2009
• Published: 06/24/2010
• Est. Priority Date: 12/24/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Ho, Sai Yiu Duncan, Maheshwari, Shailesh
• Granted Patent: US 9,554,417 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 12/02 Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
• CPC Class Codes: H04W 12/037 of the control plane, e.g. signalling traffic
• CPC Class Codes: H04W 80/02 Data link layer protocols

Abstract

Methods, apparatus, and computer program products for processing an RLC PDU having an RLC payload and an RLC header, wherein the RLC payload comprises a plurality of at least partially ciphered SDUs, each of the SDUs being either a partial or complete SDU, and wherein the RLC header comprises a separate count for each of the SDUs, each of the counts being configured to support deciphering of the corresponding SDU. Each SDU is a PDCP PDU having a PDCP payload and a PDCP header, wherein the PDCP payload comprises a plurality of IP packets, and wherein the PDCP header comprises a length indicator for at least one of the IP packets.

Claims

1. An apparatus for wireless communications, comprising:

a processing system configured to process a PDU having a payload and a header, wherein the payload comprises a plurality of at least partially ciphered SDUs, each of the SDUs being either a partial or complete SDU, and wherein the header comprises a separate count for each of the SDUs, each of the counts being configured to support deciphering of the corresponding SDU.

2. The apparatus of claim 1 wherein the PDU is an RLC PDU, the header is an RLC header, and each of the SDUs is a PDCP PDU.

3. The apparatus of claim 1 wherein each of the counts comprises a hyper-frame number and a sequence number for the corresponding SDU.

4. The apparatus of claim 1 wherein the header comprises a separate offset for at least each of the partial SDUs, each of the offsets being configured to support deciphering of the corresponding SDU.

5. The apparatus of claim 4 wherein the offset for each of the partial SDUs is related to the segmentation of the partial SDU between the PDU and at least another PDU.

6. The apparatus of claim 1 wherein the header further comprises an indication that the SDUs are ciphered and that the count for each of the SDUs is included in the header.

7. The apparatus of claim 1 wherein the header further comprises a length indicator for at least one of the SDUs.

8. The apparatus of claim 7 wherein the header further comprises an indication for each of the length indicators in the header.

9. The apparatus of claim 7 wherein the header further comprises an indication of the number of length indicators in the header.

10. The apparatus of claim 1 wherein the header comprises a sequence number for only one of the SDUs in the payload.

11. The apparatus of claim 1 wherein the processing of the PDU comprises ciphering the SDUs, generating the header, and attaching the header to the SDUs.

12. The apparatus of claim 1 wherein the processing of the PDU comprises using the counts in the header to decipher the SDUs.

13. An apparatus for wireless communications, comprising:

a processing system configured to process a PDCP PDU having a PDCP payload and a PDCP header, wherein the PDCP payload comprises a plurality of SDUs, and wherein the PDCP header comprises a length indicator for at least one of the SDUs.

14. The apparatus of claim 13 wherein each of the SDUs is an IP packet.

15. The apparatus of claim 13 wherein the PDCP header further comprises an indication for each of the length indicators in the header.

16. The apparatus of claim 13 wherein the PDCP header further comprises an indication of the number of length indicators in the PDCP header.

17. The apparatus of claim 13 wherein the header comprises a sequence number for only one of the SDUs in the payload.

18. The apparatus of claim 13 wherein the processing of the PDU comprises ciphering at least a portion of each of the SDUs, generating the PDCP header, and attaching the PDCP header to the SDUs.

19. The apparatus of claim 13 wherein the processing of the PDU comprises using the PDCP header in the PDU to recover the SDUs in the PDCP payload.

20. An apparatus for wireless communication, comprising:

a processing system configured to process an RLC PDU having an RLC payload and an RLC header, wherein the RLC payload comprises a plurality of at least partially ciphered PDCP PDUs, each of the PDCP PDUs being either a partial or complete PDCP PDU, and wherein the RLC header comprises;

a sequence number for at least one of the PDCP PDUs;

a separate offset for at least each of the partial PDCP PDUs, each of the offsets being configured to support deciphering of the corresponding PDCP PDU, wherein the offset for each of the partial PDCP PDUs is related to the segmentation of the partial PDCP PDU between the RLC PDU and at least another RLC PDU;

a separate count for each of the PDCP PDUs, each of the counts being configured to support deciphering of the corresponding PDCP PDU, wherein each of the counts comprises a hyper-frame number and a sequence number for the corresponding PDCP PDU;

an indication that the PDCP PDUs are ciphered and that the count for each of the PDCP PDUs is included in the header; and

a length indicator for at least one of the PDCP PDUs.

21. The apparatus of claim 20 wherein the RLC header further comprises an indication of the number of length indicators in the RLC header.

22. The apparatus of claim 20 wherein the RLC header further comprises an indication for each of the length indicators in the RLC header.

23. An apparatus for wireless communications, comprising:

a processing system configured to process a PDCP PDU having a PDCP payload and a PDCP header, wherein the PDCP payload comprises a plurality of IP packets, and wherein the PDCP header comprises;

a length indicator for at least one of the IP packets; and

a sequence number for only one of the IP packets in the PDCP payload.

24. The apparatus of claim 23 wherein the PDCP header further comprises an indication for each of the length indicators in the PDCP header.

25. The apparatus of claim 23 wherein the PDCP header further comprises an indication of the number of length indicators in the PDCP header.

26. An apparatus for wireless communications, comprising:

means for generating a payload comprising a plurality of at least partially ciphered SDUs, each of the SDUs being either a partial or complete SDU;

means for generating a header comprising a separate count for each of the SDUs, each of the counts being configured to support deciphering of the corresponding SDU; and

means for generating a PDU by attaching the header to the payload.

27. An apparatus for wireless communications, comprising:

means for receiving a PDU having a payload and a header, wherein the payload comprises a plurality of at least partially ciphered SDUs, each of the SDUs being either a partial or complete SDU, and wherein the header comprises a separate count for each of the SDUs, each of the counts being configured to support deciphering of the corresponding SDU; and

means for using the counts in the header to decipher the SDUs.

28. An apparatus for wireless communications, comprising:

means for generating a PDCP payload comprising comprises a plurality of SDUs;

means for generating a PDCP header comprising a length indicator for at least one of the SDUs;

means for generating a PDCP PDU by attaching the PDCP header to the PDCP payload.

29. An apparatus for wireless communications, comprising:

means for receiving a PDCP PDU having a PDCP payload and a PDCP header, wherein the PDCP payload comprises a plurality of SDUs, and wherein the PDCP header comprises a length indicator for at least one of the SDUs; and

means for using the PDCP header in the PDU to recover the SDUs in the PDCP payload.

30. A method for wireless communications, comprising:

generating a payload comprising a plurality of at least partially ciphered SDUs, each of the SDUs being either a partial or complete SDU;

generating a header comprising a separate count for each of the SDUs, each of the counts being configured to support deciphering of the corresponding SDU; and

generating a PDU by attaching the header to the payload.

31. A method for wireless communications, comprising:

receiving a PDU having a payload and a header, wherein the payload comprises a plurality of at least partially ciphered SDUs, each of the SDUs being either a partial or complete SDU, and wherein the header comprises a separate count for each of the SDUs, each of the counts being configured to support deciphering of the corresponding SDU; and

using the counts in the header to decipher the SDUs.

32. A method for wireless communications, comprising:

processing a PDU having a payload and a header, wherein the payload comprises a plurality of at least partially ciphered SDUs, each of the SDUs being either a partial or complete SDU, and wherein the header comprises a separate count for each of the SDUs, each of the counts being configured to support deciphering of the corresponding SDU.

33. A method for wireless communications, comprising:

processing a PDCP PDU having a PDCP payload and a PDCP header, wherein the PDCP payload comprises a plurality of SDUs, and wherein the PDCP header comprises a length indicator for at least one of the SDUs.

34. A computer product, comprising:

a computer readable medium comprising code for;

processing a PDU having a payload and a header, wherein the payload comprises a plurality of at least partially ciphered SDUs, each of the SDUs being either a partial or complete SDU, and wherein the header comprises a separate count for each of the SDUs, each of the counts being configured to support deciphering of the corresponding SDU.

35. A computer product, comprising:

a computer readable medium comprising code for;

processing a PDCP PDU having a PDCP payload and a PDCP header, wherein the PDCP payload comprises a plurality of SDUs, and wherein the PDCP header comprises a length indicator for at least one of the SDUs.