ACK-NACK Signaling Enhancements

• US 20150113352A1
• Filed: 12/30/2014
• Published: 04/23/2015
• Est. Priority Date: 03/22/2012
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Somichetty, Gowrisankar, Rajagopal, Sriram
• Granted Patent: US 9,252,923 B2
• Time in Patent Office: Days
• US Class Current: 714/749
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1635 Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence

Abstract

An ACK-NACK feedback message indicates which code words within a transport block that were received in error. The ACK-NACK message has a variable format based on the number of code words in the transport block and the number of code words received in error.

Claims

1. An apparatus, comprising:

a transmitter configured to transmit an outbound RF signal to a destination device, the outbound RF signal including a plurality of code words forming a transport block;

a receiver configured to receive an Acknowledgement-Negative Acknowledgement (ACK-NACK) message from the destination device, wherein when one or more of the code words within the transport block were received in error by the destination device, the ACK-NACK message indicating the one or more code words that were received in error; and

a processing module configured to determine the one or more code words that were received in error from the ACK-NACK message and retransmit the one or more code words that were received in error to the destination device via the transmitter.

2. The apparatus of claim 1, wherein the ACK-NACK message includes a first part indicating a number of code words received in error and a second part indicating the one or more of the code words that were received in error.

3. The apparatus of claim 2, wherein bits in the first part are coded more strongly than bits in the second part.

4. The apparatus of claim 2, wherein a number of bits in at least one of the first part and the second part is variable based on a number of code words in the transport block and the number of code words received in error.

5. The apparatus of claim 4, wherein the number of bits in at least one of the first part and the second part is dynamically adjusted in real-time.

6. The apparatus of claim 2, wherein a number of bits in the first part is two.

7. The apparatus of claim 6, wherein a number of bits in the second part is zero when one or more of all of the code words in the transport block were received without error or more than two code words are received in error.

8. The apparatus of claim 6, wherein a number of bits in the second part is six when at least one of the code words is received in error.

9. The apparatus of claim 1, wherein the ACK-NACK message includes one bit for each code word in the transport block.

10. The apparatus of claim 1, wherein the processing module is further configured to determine a format of the ACK-NACK message to be used by the destination device and to transmit control information including the format of the ACK-NACK message to the destination device via the transmitter.

11. An apparatus, comprising:

a transmitter configured to transmit an outbound RF signal to a destination device, the outbound RF signal including a plurality of code words forming a transport block;

a receiver configured to receive an Acknowledgement-Negative Acknowledgement (ACK-NACK) message from the destination device, the ACK-NACK message having a variable format based on a number of code words in the transport block and a number of code words received in error by the destination device, wherein when one or more of the code words within the transport block were received in error by the destination device, the ACK-NACK message indicating the one or more code words that were received in error; and

a processing module configured to determine the one or more code words that were received in error from the ACK-NACK message and retransmit the one or more code words that were received in error to the destination device via the transmitter.

12. The apparatus of claim 11, wherein the ACK-NACK message includes a first part indicating the number of code words received in error and a second part indicating the one or more of the code words that were received in error.

13. The apparatus of claim 12, wherein bits in the first part are coded more strongly than bits in the second part.

14. The apparatus of claim 12, wherein a number of bits in at least one of the first part and the second part is variable based on the number of code words in the transport block and the number of code words received in error.

15. The apparatus of claim 14, wherein the number of bits in at least one of the first part and the second part is dynamically adjusted in real-time.

16. The apparatus of claim 12, wherein a number of bits in the first part is two.

17. The apparatus of claim 16, wherein a number of bits in the second part is zero when one or more of all of the code words in the transport block were received without error or more than two code words are received in error.

18. The apparatus of claim 16, wherein a number of bits in the second part is six when at least one of the code words is received in error.

19. A method for Acknowledgement-Negative Acknowledgement (ACK-NACK) signaling, comprising:

transmitting an outbound RF signal to a destination device, the outbound RF signal including a plurality of code words forming a transport block;

receiving an Acknowledgement-Negative Acknowledgement (ACK-NACK) message from the destination device, wherein when one or more of the code words within the transport block were received in error by the destination device, the ACK-NACK message indicating the one or more code words that were received in error;

determining the one or more code words that were received in error from the ACK-NACK message; and

retransmitting the one or more code words that were received in error to the destination device via the transmitter.

20. The method of claim 19, wherein the ACK-NACK message includes a first part indicating a number of code words received in error and a second part indicating the one or more of the code words that were received in error, a number of bits in at least one of the first part and the second part being variable based on a number of code words in the transport block and the number of code words received in error.