System and method for monitoring transmission sequence numbers assigned to protocol data units to detect and correct transmission errors

• US 20040004954A1
• Filed: 05/09/2003
• Published: 01/08/2004
• Est. Priority Date: 05/10/2002
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Shin, Sung-Hyuk, Terry, Stephen E., Miller, James M., Chao, Yi-Ju
• Granted Patent: US 7,430,206 B2
• Time in Patent Office: Days
• US Class Current: 370/349
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1628 List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers H04L1/1614 takes precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1848 Time-out mechanisms
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 2001/125 Arrangements for preventing errors in the return channel

Abstract

A wireless communication system is configured to monitor transmission sequence numbers (TSNs) assigned to protocol data units (PDUs) processed by the system. The system includes at least one user equipment (UE) having, a queue, and a Node B in communication with the UE. The UE determines that a data block having an expected TSN was not received, and generates a TSN status report message. The Node B retransmits a data block including the expected TSN to the UE in response to the TSN status report message. The retransmitted data block is placed in a specific location in the queue designated by the TSN status report message.

Claims

1. A method for detecting and correcting transmission errors in a wireless communication system, the method comprising:

(a) receiving and temporarily storing a plurality of data blocks in a queue, each data block including a unique transmission sequence number (TSN);

(b) determining that a data block having an expected TSN was not received;

(c) generating a TSN status report message indicating that the expected TSN was not received;

(d) retransmitting a data block including the expected TSN in response to the TSN status report message; and

(e) placing the retransmitted data block in a specific location in the queue designated by the TSN status report message.

2. The method of claim 1 wherein the TSN status report message is transmitted over an uplink dedicated physical control channel—

high speed (DPCCH-HS).

3. The method of claim 2 wherein the DPCCH-HS has a structure with three fields including:

(i) a transmission status field for carrying ACK/NACK information;

(ii) a channel qualifier identifier (CQI) field; and

(iii) a TSN field.

4. The method of claim 3 wherein each field is located in one or more timeslots of a transmission time interval (TTI) of the DPCCH-HS.

5. The method of claim 1 wherein the TSN status report message includes a reordering queue indicator used to implement step (e).

6. The method of claim 1, further comprising:

(f) detecting a signal interpreted to be an ACK;

(g) based on the TSN status report message, determining that that ACK was interpreted incorrectly in step (f) and is actually a NACK.

7. A wireless communication system, comprising:

(a) a queue which receives and temporarily stores a plurality of data blocks, each data block including a unique transmission sequence number (TSN);

(b) means for determining that a data block having an expected TSN was not received;

(c) means for generating a TSN status report message indicating that the expected TSN was not received;

(d) means for retransmitting a data block including the expected TSN in response to the TSN status report message; and

(e) means for placing the retransmitted data block in a specific location in the queue designated by the TSN status report message.

8. The system of claim 7 wherein the TSN status report message is transmitted over an uplink dedicated physical control channel—

high speed (DPCCH-HS).

9. The system of claim 8 wherein the DPCCH-HS has a structure with three fields including:

(i) a transmission status field for carrying ACK/NACK information;

(ii) a channel qualifier identifier (CQI) field; and

(iii) a TSN field.

10. The system of claim 9 wherein each field is located in one or more timeslots of a transmission time interval (TTI) of the DPCCH-HS.

11. The system of claim 7 wherein the TSN status report message includes a reordering queue indicator used to place the retransmitted data block in a specific location in the queue.

12. A wireless communication system, the system being configured to monitor transmission sequence numbers (TSNs) assigned to protocol data units (PDUs) processed by the system, the system comprising:

(a) at least one user equipment (UE);

(b) at least one queue in communication with the UE; and

(c) a Node B in communication with the UE, wherein;

(i) the UE determines that a data block having an expected TSN was not received, and generates a TSN status report message indicating that the expected TSN was not received;

(ii) the Node B retransmits a data block including the expected TSN to the UE in response to the TSN status report message; and

(iii) the retransmitted data block is placed in a specific location in the queue designated by the TSN status report message.

13. The system of claim 12 wherein the TSN status report message is transmitted over an uplink dedicated physical control channel—

high speed (DPCCH-HS).

14. The system of claim 13 wherein the DPCCH-HS has a structure with three fields including:

(i) a transmission status field for carrying ACK/NACK information;

(ii) a channel qualifier identifier (CQI) field; and

(iii) a TSN field.

15. The system of claim 12 wherein each field is located in one or more timeslots of a transmission time interval (TTI) of the DPCCH-HS.

16. The system of claim 12 wherein the TSN status report message includes a reordering queue indicator used to place the retransmitted data block in a specific location in the queue.

17. A wireless communication system, the system being configured to monitor transmission sequence numbers (TSNs) assigned to protocol data units (PDUs) processed by the system, the system comprising:

(a) a receiver;

(b) at least one queue in communication with the receiver side; and

(c) a transmitter in communication with the receiver, wherein;

(i) the receiver determines that a data block having an expected TSN was not received, and generates a TSN status report message indicating that the expected TSN was not received;

(ii) the transmitter retransmits a data block including the expected TSN to the receiver in response to the TSN status report message; and

(iii) the retransmitted data block is placed in a specific location in the queue designated by the TSN status report message.

18. The system of claim 17 wherein the TSN status report message is transmitted over an uplink dedicated physical control channel—

high speed (DPCCH-HS).

19. The system of claim 18 wherein the DPCCH-HS has a structure with three fields including:

(i) a transmission status field for carrying ACK/NACK information;

(ii) a channel qualifier identifier (CQI) field; and

(iii) a TSN field.

20. The system of claim 19 wherein each field is located in one or more timeslots of a transmission time interval (TTI) of the DPCCH-HS.

21. The system of claim 17 wherein the TSN status report message includes a reordering queue indicator used to place the retransmitted data block in a specific location in the queue.

22. A method for detecting and correcting transmission errors in a wireless communication system, the system including a queue which receives and temporarily stores a plurality of data blocks, each data block including a unique transmission sequence number (TSN), the method comprising:

generating a TSN status report message indicating that an expected TSN was not received; and

transmitting the TSN status report message over an uplink dedicated physical control channel—

high speed (DPCCH-HS), wherein the DPCCH-HS has a structure with three fields including;

(i) a transmission status field for carrying ACK/NACK information;

(ii) a channel qualifier identifier (CQI) field; and

(iii) a TSN field.

23. The method of claim 22 wherein each field is located in one or more timeslots of a transmission time interval (TTI) of the DPCCH-HS.

24. The method of claim 22 wherein the TSN status report message includes a reordering queue indicator used to place the retransmitted data block in a specific location in the queue.