Method and apparatus for reducing transmission errors in a third generation cellular system

• US 20030235162A1
• Filed: 05/07/2003
• Published: 12/25/2003
• Est. Priority Date: 05/07/2002
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Chao, Yi-Ju, Dick, Stephen G., Miller, James M.
• Granted Patent: US 7,124,350 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• 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 2001/125 Arrangements for preventing errors in the return channel

Abstract

A wireless communication method system for detecting and correcting transmission errors. The system includes at least one Wireless Transmit/Receive Unit (WTRU) in communication with a Node B. The Node B sends a transmission signal (e.g., containing a protocol data unit (PDU)) to the WTRU. The WTRU generates a Revert Message having a first field and a second field to indicate whether the transmission signal was successfully received at the WTRU. The WTRU inserts a NACK or ACK message into the first field and inserts a respective channel quality identifier (CQI) value corresponding to a worst or best possible value of CQI into the second field. The WTRU transmits the Revert Message to the Node B. The Node B compares the contents of the first field to the contents of the second field. The Node B resends the transmission signal to the WTRU if the contents of the first and second fields are not logically consistent.

Claims

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

(a) sending a transmission signal to a destination;

(b) generating a Revert Message to indicate whether the transmission signal was successfully received at the destination, the Revert Message having a first field and a second field;

(c) inserting a NACK message into the first field;

(d) inserting a channel quality identifier (CQI) value into the second field;

(e) transmitting the Revert Message;

(f) generating an error message in response to receiving the transmitted Revert Message, if the contents of the first and second fields of the Revert Message are not logically consistent.

2. The method of claim 1 further comprising:

(g) resending the transmission signal to the destination in response to the error message.

3. The method of claim 1 wherein the CQI value corresponds to a worst possible value.of CQI.

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

(a) sending a transmission signal to a destination;

(b) generating a Revert Message to indicate whether the transmission signal was successfully received at the destination, the Revert Message having a first field and a second field;

(c) inserting an ACK message into the first field;

(d) inserting a channel quality identifier (CQI) value into the second field;

(e) transmitting the Revert Message; and

(f) generating an error message in response to receiving the transmitted Revert Message, if the contents of the first and second fields of the Revert Message are not logically consistent.

5. The method of claim 4 further comprising:

(g) resending the transmission signal to the destination in response to the error message.

6. The method of claim 4 wherein the CQI value corresponds to a best possible value of CQI.

7. A wireless communication system for detecting and correcting transmission errors, the system comprising:

(a) means for sending a transmission signal to a destination;

(b) means for generating a Revert Message to indicate whether the transmission signal was successfully received at the destination, the Revert Message having a first field and a second field;

(c) means for inserting a NACK message into the first field;

(d) means for inserting a channel quality identifier (CQI) value into the second field;

(e) means for transmitting the Revert Message; and

(f) means for generating an error message in response to receiving the transmitted Revert Message, if the contents of the first and second fields of the Revert Message are not logically consistent.

8. The system of claim 7 further comprising:

(g) means for resending the transmission signal to the destination in response to the error signal.

9. The system of claim 7 wherein the CQI value corresponds to a worst possible value of CQI.

10. A wireless communication system for detecting and correcting transmission errors, the system comprising:

(a) means for sending a transmission signal to a destination;

(b) means for generating a Revert Message to indicate whether the transmission signal was successfully received at the destination, the Revert Message having a first field and a second field;

(c) means for inserting an ACK message into the first field;

(d) means for inserting a channel quality identifier (CQI) value into the second field;

(e) means for transmitting the Revert Message; and

(f) means for generating an error message in response to receiving the transmitted Revert Message, if the contents of the first and second fields of the Revert Message are not logically consistent.

11. The system of claim 10 further comprising:

(g) means for resending the transmission signal to the destination in response to the error signal.

12. The system of claim 10 wherein the CQI value corresponds to a best possible value of CQI.

13. A wireless communication system for detecting and correcting transmission errors, the system comprising:

(a) a Node B; and

(b) at least one Wireless Transmit/Receive Unit (WTRU) in communication with the Node B, wherein;

(i) the Node B sends a transmission signal to the WTRU;

(ii) the WTRU generates a Revert Message to indicate whether the transmission signal was successfully received at the WTRU, the Revert Message having a first field and a second field;

(iii) the WTRU inserts a NACK message into the first field;

(iv) the WTRU inserts a channel quality identifier (CQI) value into the second field;

(v) the WTRU transmits the Revert Message to the Node B;

(vi) the Node B compares the contents of the first field to the contents of the second field; and

(vii) the Node B resends the transmission signal to the WTRU, if the contents of the first and second fields are not logically consistent.

14. The system of claim 13 wherein the CQI value corresponds to a worst possible value of CQI.

15. A wireless communication system for detecting and correcting transmission errors, the system comprising:

(a) a Node B; and

(b) at least one Wireless Transmit/Receive Unit (WTRU) in communication with the Node B, wherein;

(i) the Node B sends a transmission signal to the WTRU;

(ii) the WTRU generates a Revert Message to indicate whether the transmission signal was successfully received at the WTRU, the Revert Message having a first field and a second field;

(iii) the WTRU inserts an ACK message into the first field;

(iv) the WTRU inserts a channel quality identifier (CQI) value into the second field;

(v) the WTRU transmits the Revert Message to the Node B;

(vi) the Node B compares the contents of the first field to the contents of the second field; and

(vii) the Node B resends the transmission signal to the WTRU if the contents of the first and second fields are not logically consistent.

16. The system of claim 15 wherein the CQI value corresponds to a best possible value of CQI.

17. A wireless communication system for detecting and correcting transmission errors, the system comprising:

(a) a Node B; and

(b) at least one Wireless Transmit/Receive Unit (WTRU) in communication with the Node B, wherein;

(i) the Node B sends information to the WTRU;

(ii) the WTRU generates a report indicating whether the information was successfully received at the WTRU, the report including a first field and a second field;

(iii) the WTRU inserts a first value into the first field;

(iv) the WTRU inserts a second value into the second field;

(v) the WTRU sends the report to the Node B;

(vi) the Node B compares the contents of the first field to the contents of the second field; and

(vii) the Node B takes corrective action if the contents of the first and second fields are not logically consistent.

18. The system of claim 17 wherein the corrective action includes resending the information from the Node B to the WTRU.

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

(a) sending information from a first destination to a second destination;

(b) generating a report indicating whether the information was successfully received at the second destination, the report including a first field and a second field;

(c) inserting a first value into the first field;

(d) inserting a second value into the second field;

(e) transmitting the report to the first destination;

(f) comparing the contents of the first field to the contents of the second field; and

(g) taking corrective action if the contents of the first and second fields are not logically consistent.

20. The method of claim 19 wherein the corrective action includes resending the information from the first destination to the second destination.

21. A wireless communication system for detecting and correcting transmission errors, the system comprising:

(a) means for sending information from a first destination to a second destination;

(b) means for generating a report indicating whether the information was successfully received at the second destination, the report including a first field and a second field;

(c) means for inserting a first value into the first field;

(d) means for inserting a second value into the second field;

(e) means for transmitting the report to the first destination;

(f) means for comparing the contents of the first field to the contents of the second field; and

(g) means for taking corrective action if the contents of the first and second fields are not logically consistent.

22. The system of claim 21 wherein the corrective action includes resending the information from the first destination to the second destination.