Granted Patent B2

US 8,473,825 · App. 12/541,070 · Granted Jun 25, 2013

Abstract

Claims (40)

1. A method for an acknowledged mode (AM) radio link control (RLC) receiving entity to promote a retransmission of at least one segment of a data protocol data unit (PDU), the method comprising:

constructing, by the receiving entity, a STATUS PDU such that an AM RLC transmitting entity receiving the STATUS PDU retransmits the at least one segment,

wherein the construction of the STATUS PDU includes setting an acknowledgment sequence number (ACK_SN) field in the STATUS PDU to a sequence number corresponding to the data PDU,

wherein the data PDU is partially received based on an initial transmission, and

wherein the STATUS PDU has insufficient space to describe all missing segments of the data PDU.

2. The method of claim 1 , further comprising, omitting from the STATUS PDU a negative acknowledgment sequence number (NACK_SN) field for the data PDU.

3. The method of claim 1 , further comprising, a transmitting entity keeping the entire data PDU for possible retransmission when the STATUS PDU indicates that at least a portion of the data PDU is not successfully received.

4. The method of claim 1 , further comprising, a transmitting entity keeping the entire data PDU for possible retransmission when the STATUS PDU indicates that at least a portion of the data PDU is not successfully received and the data PDU sequence number corresponds to a final NACK_SN field in the STATUS PDU.

5. The method of claim 1 , wherein the construction of the STATUS PDU comprises including in the STATUS PDU a NACK_SN field for the entire data PDU.

6. The method of claim 1 , wherein the construction of the STATUS PDU comprises setting a field in the STATUS PDU to a value that indicates that information about a segment of the data PDU is not included in the STATUS PDU.

7. The method of claim 6 , wherein the field is one of:

the E1 field; and

the Control Packet Type field.

8. The method of claim 1 , wherein the construction of the STATUS PDU includes consolidating a plurality of segments into one segment for the purpose of constructing the STATUS PDU.

9. The method of claim 8 , wherein the consolidation is performed by including a first number and a second number in the STATUS PDU, the first number being a segment offset start (SOstart) of a first segment of the plurality of segments, and the second number being a segment offset end (SOend) of a last segment of the plurality of segments.

10. An acknowledged mode (AM) radio link control (RLC) receiving entity, comprising:

a processor configured such that the receiving entity constructs a STATUS protocol data unit (PDU) such that an AM RLC transmitting entity retransmits at least one segment of a data PDU,

wherein the construction of the STATUS PDU includes setting an acknowledgment sequence number (ACK_SN) field in the STATUS PDU to a sequence number corresponding to the data PDU,

wherein the data PDU is partially received based on an initial transmission, and

wherein the STATUS PDU has insufficient space to describe all missing segments of the data PDU.

11. The receiving entity of claim 10 , further comprising, omitting from the STATUS PDU a negative acknowledgment sequence number (NACK_SN) field for the data PDU.

12. The receiving entity of claim 10 , further comprising, a transmitting entity keeping the entire data PDU for possible retransmission when the STATUS PDU indicates that at least a portion of the data PDU is not successfully received.

13. The receiving entity of claim 10 , further comprising, a transmitting entity keeping the entire data PDU for possible retransmission when the STATUS PDU indicates that at least a portion of the data PDU is not successfully received and the data PDU sequence number corresponds to a final NACK_SN field in the STATUS PDU.

14. The receiving entity of claim 10 , wherein the construction of the STATUS PDU comprises including in the STATUS PDU a NACK_SN field for the entire data PDU.

15. The receiving entity of claim 10 , wherein the construction of the STATUS PDU comprises setting a field in the STATUS PDU to a value that indicates that information about a segment of the data PDU is not included in the STATUS PDU.

16. The receiving entity of claim 15 , wherein the field is one of:

the E1 field; and

the Control Packet Type field.

17. The receiving entity of claim 10 , wherein the construction of the STATUS PDU includes consolidating a plurality of segments into one segment for the purpose of constructing the STATUS PDU.

18. The receiving entity of claim 17 , wherein the consolidation is performed by including a first number and a second number in the STATUS PDU, the first number being a segment offset start (SOstart) of a first segment of the plurality of segments, and the second number being a segment offset end (SOend) of a last segment of the plurality of segments.

19. A method for an acknowledged mode (AM) radio link control (RLC) receiving entity to promote a retransmission of at least one segment of a data protocol data unit (PDU), the method comprising:

constructing, by the receiving entity, a STATUS PDU such that an AM RLC transmitting entity receiving the STATUS PDU retransmits the at least one segment,

wherein the construction of the STATUS PDU includes setting an acknowledgment sequence number (ACK_SN) field in the STATUS PDU to a sequence number corresponding to the data PDU and includes omitting from the STATUS PDU a negative acknowledgment sequence number (NACK_SN) field for the data PDU when there is insufficient space to describe all missing segments of the data PDU,

wherein the data PDU is partially received based on an initial transmission, and

wherein the STATUS PDU has insufficient space to describe all missing segments of the data PDU.

20. An acknowledged mode (AM) radio link control (RLC) receiving entity, comprising:

a processor configured such that the receiving entity constructs a STATUS protocol data unit (PDU) such that an AM RLC transmitting entity retransmits at least one segment of a data PDU,

wherein the construction of the STATUS PDU includes setting an acknowledgment sequence number (ACK_SN) field in the STATUS PDU to a sequence number corresponding to the data PDU and includes omitting from the STATUS PDU a negative acknowledgment sequence number (NACK_SN) field for the data PDU when there is insufficient space to describe all missing segments of the data PDU,

wherein the data PDU is partially received based on an initial transmission, and

wherein the STATUS PDU has insufficient space to describe all missing segments of the data PDU.

Assignments (8)