Radio link control unacknowledged mode header optimization

1. A method comprising:

inserting, by a radio link control entity, at least one service data unit to a protocol data unit of an appropriate size; and

providing at least one indicator including a length indicator to indicate that a first data octet of the protocol data unit is a first octet of a first service data unit and at least one other octet of the protocol data unit is the last octet of another service data unit, the first service data unit being either the same or different from the other service data unit, wherein the length indicator indicates that the protocol data unit comprises one or more completed service data units, wherein the method is performed in an apparatus.

2. The method of claim 1 , wherein the at least one other octet is the last octet of the protocol data unit.

3. The method of claim 1 , wherein the at least one other octet is the second last octet of the protocol data unit.

4. The method of claim 1 , wherein the radio link control entity is an unacknowledged mode entity.

5. The method of claim 1 , wherein providing at least one indicator further comprises providing the length indicator of at least one of 7 or 15 bits.

6. The method of claim 1 , wherein providing at least one indicator further comprises providing the length indicator with a value of “0000000” to indicate that the first data octet of the protocol data unit is the first octet of a first service data unit and the last octet of the protocol data unit is the last octet of the other service data unit, the first service data unit being either the same or different from the other service data unit.

7. The method of claim 1 , wherein providing at least one indicator further comprises providing the length indicator with a value of “1111100” to indicate that the first data octet of the protocol data unit is the first octet of a first service data unit and the last octet of the protocol data unit is the last octet of another service data unit, the first service data unit being either the same or different from the other service data unit.

8. The method of claim 1 , wherein providing at least one indicator further comprises providing the length indicator with a value of “1111101” to indicate that the first data octet in a current protocol data unit is the first octet of the first service data unit and the last octet in the current protocol data unit is the last octet of the first service data unit.

9. The method of claim 8 , wherein providing the length indicator with a value of “1111101” further comprises indicating that the first service data unit is two octets smaller than the current protocol data unit.

10. The method of claim 1 , wherein providing at least one indicator further comprises providing the length indicator with a value of “1111101” to indicate that the first data octet in a current protocol data unit is the first octet of the first service data unit and the last octet in the current protocol data unit is the last octet of the other service data unit, the first service data unit being either the same or different from the other service data unit.

11. The method of claim 1 , wherein providing at least one indicator further comprises providing the length indicator with a value of “111 1111 1111 1101” to indicate that the first data octet in a current protocol data unit is the first octet of the first service data unit and the last octet in the current protocol data unit is the last octet of the first service data unit.

12. The method of claim 11 , wherein providing the length indicator with a value of “111 1111 1111 1101” further comprises indicating that the first service data unit is three or four octets smaller than the current protocol data unit.

13. The method of claim 1 , wherein providing at least one indicator further comprises providing the length indicator with a value of “111 1111 1111 1010” to indicate that the first data octet in a current protocol data unit is the first octet of the first service data unit and that a second last octet of the current protocol data unit is the last octet of the first service data unit.

14. The method of claim 13 , wherein providing the length indicator with a value of “111 1111 1111 1010” further comprises indicating that the first service data unit is three or four octets smaller than the current protocol data unit.

15. The method of claim 1 , further comprising providing a higher layer signalling to a user equipment to identify whether or not the length indicator is used.

16. An apparatus comprising:

an inserting unit configured to insert, in a radio link control entity, at least one service data unit to a protocol data unit of an appropriate size; and

a providing unit configured to provide at least one indicator including a length indicator configured to indicate that a first data octet of the protocol data unit is a first octet of a first service data unit and at least one other octet of the protocol data unit is the last octet of another service data unit, the first service data unit being either the same or different from the other service data unit, wherein the length indicator indicates that the protocol data unit comprises one or more completed service data units, wherein the apparatus is implemented at least partly in hardware.

17. The apparatus of claim 16 , wherein the at least one other octet is the last octet of the protocol data unit.

18. The apparatus of claim 16 , wherein the at least one other octet is the second last octet of the protocol data unit.

19. The apparatus of claim 16 , wherein the radio link control entity is an unacknowledged mode entity.

20. The apparatus of claim 16 , wherein the providing unit is configured to provide at least one indicator further comprises providing the length indicator of at least one of 7 or 15 bits.

21. The apparatus of claim 16 , wherein the providing unit is configured to provide the length indicator with a value of “0000000” to indicate that the first data octet of the protocol data unit is the first octet of the first service data unit and the last octet of the protocol data unit is the last octet of another service data unit, the first service data unit being either the same or different from the other service data unit.

22. The apparatus of claim 16 , wherein the providing unit is configured to provide the length indicator with a value of “1111100” to indicate that the first data octet of the protocol data unit is the first octet of the first service data unit and the last octet of the protocol data unit is the last octet of another service data unit, the first service data unit being either the same or different from the other service data unit.

23. The apparatus of claim 16 , wherein the providing unit is configured to provide the length indicator with a value of “1111101” to indicate that the first data octet in a current protocol data unit is the first octet of the first service data unit and the last octet in the current protocol data unit is the last octet of the first service data unit.

24. The apparatus of claim 23 , wherein the providing unit is configured to provide the length indicator with a value of “1111101” to indicate that the first service data unit is two octets smaller than the current protocol data unit.

25. The apparatus of claim 16 , wherein the providing unit is configured to provide the length indicator with a value of “1111101” to indicate that the first data octet in a current protocol data unit is the first octet of the first service data unit and the last octet in the current protocol data unit is the last octet of another service data unit, the first service data unit being either the same or different from the other service data unit.

26. The apparatus of claim 16 , wherein the providing unit is configured to provide the length indicator with a value of “111 1111 1111 1101” to indicate that the first data octet in a current protocol data unit is the first octet of the first service data unit and the last octet in the current protocol data unit is the last octet of the first service data unit.

27. The apparatus of claim 26 , wherein the providing unit is configured to provide the length indicator with a value of “111 1111 1111 1101” to indicate that the first service data unit is three or four octets smaller than the current protocol data unit.

28. The apparatus of claim 16 , wherein the providing unit is configured to provide the length indicator with a value of “111 1111 1111 1010” to indicate that the first data octet in a current protocol data unit is the first octet of the first service data unit and that a second last octet of the current protocol data unit is the last octet of the first service data unit.

29. The apparatus of claim 28 , wherein the providing unit is configured to provide the length indicator with a value of “111 1111 1111 1010” to indicate that the first service data unit is three or four octets smaller than the current protocol data unit.

30. An apparatus comprising:

inserting means for inserting in a radio link control entity, at least one service data unit to a protocol data unit of an appropriate size; and

providing means for providing at least one indicator including a length indicator for indicating that a first data octet of the protocol data unit is a first octet of a first service data unit and at least one other octet of the protocol data unit is the last octet of another service data unit, the first service data unit being either the same or different from the other service data unit, wherein the length indicator indicates that the protocol data unit comprises one or more completed service data units, wherein the apparatus is implemented at least partly in hardware.

31. A computer program product embodied on a computer readable medium, the computer program product comprising code portions for:

inserting, in a radio link control entity, at least one service data unit to a protocol data unit of an appropriate size; and

providing at least one indicator including a length indicator to indicate that a first data octet of the protocol data unit is a first octet of a first service data unit and at least one other octet of the protocol data unit is the last octet of another service data unit, the first service data unit being either the same or different from the other service data unit, wherein the length indicator indicates that the protocol data unit comprises one or more completed service data units.