METHODS, APPARATUSES AND COMPUTER PROGRAM PRODUCT FOR PDU FORMATTING ACCORDING TO SDU SEGMENTATION

• US 20180376372A1
• Filed: 12/23/2015
• Published: 12/27/2018
• Est. Priority Date: 12/23/2015
• Status: Active Grant

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Turtinen, Samuli Heikki, Koskela, Timo
• Granted Patent: US 10,701,588 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0079 Formats for control data H04L1/16 takes precedence; training sequences H04L25/00 and H04L27/00
• CPC Class Codes: H04L 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control
• CPC Class Codes: H04L 47/34 ensuring sequence integrity, e.g. using sequence numbers
• CPC Class Codes: H04L 47/36 by determining packet size, e.g. maximum transfer unit [MTU]
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets

Abstract

There is provided a method comprising determining, for a service data unit to be included in a protocol data unit, whether a segment of the service data unit is to be included in the protocol data unit and, if so, determining the position of the segment relative to the service data unit, the protocol data unit comprising a header part and a data field part, determining whether to include information in the header part in dependence of the first determining, and, if so, determining the content of the information in dependence on the first determining and providing the protocol data unit to a receiver entity.

Claims

1. A method comprising

determining, for a SDU to be included in a PDU, whether a segment of the SDU is to be included in the PDU and, if so, determining the position of the segment relative to the SDU, the PDU comprising a header part and a data field part;

determining whether to include information in the header part in dependence of the first determining, and, if so, determining the content of the information in dependence on the first determining; and

providing the PDU to a receiver entity.

2. A method according to claim 1, comprising determining that a segment of the SDU is the first segment of the SDU and that the content of the information indicates the SDU length.

3. A method according to claim 1, comprising determining that a segment of the SDU is a segment between the first segment and the last segment of the SDU and that the content of the information indicates segment offset.

4. A method according to claim 1, comprising determining that a segment of the SDU is the last segment of the SDU and that the content of the information indicates the SDU segment length.

5. A method according to claim 1, comprising determining that a segment of the SDU is the last segment of the SDU and fills the PDU, and determining not to include the information in the header part.

6. A method according to claim 1, wherein the information comprises a length indicator field.

7. A method according to claim 1, wherein the header part comprises framing information, the framing information comprising a first bit indicative of whether the first byte of the data field corresponds to the first byte of a SDU and a second bit indicative of whether the last byte of the data field corresponds to the last byte of a SDU.

8. A method according to claim 7, wherein the header part comprises data field element information, the data field element indicative of the number of data field elements in the data field and comprising providing data field element information after the second bit of the framing information and before the first bit of the framing information.

9. A method according to claim 1, wherein the receiver entity is a radio link control entity.

10. A method according to claim 1, wherein the header part comprises a sequence number and the sequence number corresponds to the sequence number of the first SDU included in the PDU.

18. A computer program product for a computer, comprising software code portions for performing the steps of claim 1 when said product is run on the computer.

11. A method comprising:

receiving a PDU from a transmission entity, the PDU comprising a header part and a data field part;

determining whether a segment of a SDU is present in the PDU and, if so, determining the position of the segment relative to the SDU; and

determining whether information is present in the header part and, if so, using said information in dependence on the first determining.

12. A method according to claim 11, comprising determining that a segment of the SDU is the first segment of the SDU and wherein the content of the information indicates the SDU length.

13. A method according to claim 11, comprising determining that a segment of the SDU is a segment between the first segment and the last segment of the SDU and wherein the content of the information indicates segment offset.

14. A method according to claim 11, comprising determining that a segment of the SDU is the last segment of the SDU and wherein the content of the information indicates the SDU segment length.

15. A method according to claim 11, wherein the first information comprises a length indicator field.

16. A method according to claim 11, wherein the header part comprises framing information, the framing information comprising a first bit indicative of whether the first byte of the data field corresponds to the first byte of a SDU and a second bit indicative of whether the last byte of the data field corresponds to the last byte of a SDU.

17. (canceled)

19. An apparatus comprising:

at least one processor and at least one memory including a computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to;

determine, for a SDU to be included in a PDU, whether a segment of the SDU is to be included in the PDU and, if so, determining the position of the segment relative to the SDU, the PDU comprising a header part and a data field part;

determine whether to include information in the header part in dependence of the first determining, and, if so, determining the content of the information in dependence on the first determining; and

provide the PDU to a receiver entity.

20. An apparatus comprising:

at least one processor and at least one memory including a computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to;

receive a PDU from a transmission entity, the PDU comprising a header part and a data field part;

determine whether a segment of a SDU is present in the PDU and, if so, determining the position of the segment relative to the SDU; and

determine whether information is present in the header part and, if so, using said information in dependence on the first determining.