Method, arrangement and detector for detecting hybrid automatic repeat request acknowledgement information

Patent metadata

Field	Value
Publication number	US-9319185-B2
Application number	US-201214401705-A
Country	US
Kind code	B2
Filing date	May 28, 2012
Priority date	May 28, 2012
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

Wireless communications may benefit from a method, an arrangement, and a detector for detecting HARQ-ACK information. According to embodiments of the present invention, the method comprises extracting a HARQ-ACK symbol sequence in data transmitted from a user equipment. The method also comprises generating a plurality of candidate HARQ-ACK symbol sequences. The method further comprises calculating a degree of similarity between each of the plurality of candidate HARQ-ACK symbol sequences and the extracted HARQ-ACK symbol sequence to obtain a plurality of degrees of similarity. The method additionally comprises comparing an extremum of the plurality of degrees of similarity with a predetermined threshold. Furthermore, the method comprises determining, based upon the comparing, whether the HARQ-ACK information has been transmitted from the user equipment.

First claim

What is claimed is:

1. A method for detecting hybrid automatic repeat request acknowledgement (HARQ-ACK) information, the method comprising:
extracting a HARQ-ACK symbol sequence in data transmitted from a user equipment;
generating a plurality of candidate HARQ-ACK symbol sequences;
calculating a degree of similarity between each of the plurality of candidate HARQ-ACK symbol sequences and the extracted HARQ-ACK symbol sequence to obtain a plurality of degrees of similarity;
comparing an extremum of the plurality of degrees of similarity with a predetermined threshold;
determining, based upon the comparing, whether the HARQ-ACK information has been transmitted from the user equipment.

2. The method of claim 1 , wherein the generating comprises generating the plurality of candidate HARQ-ACK symbol sequences based upon a previous downlink scheduling assignment and a previous uplink scheduling grant.

3. The method of claim 1 , wherein the calculating the degree of similarity comprises calculating a Euclidean distance or a degree of correlation between each of the plurality of candidate HARQ-ACK symbol sequences and the extracted HARQ-ACK symbol sequence to form a plurality of Euclidean distances or a plurality of degrees of correlation.

4. The method of claim 3 :
wherein the calculating comprises calculating a first threshold and a second threshold according to a cumulative distribution function with respect to the plurality of Euclidean distances or the plurality of degrees of correlation;
wherein the first threshold meets a missed detection probability condition of the HARQ-ACK information and the second threshold meets a false detection probability condition of the HARQ-ACK information.

5. The method of claim 4 , wherein for the plurality of Euclidean distances, the method comprises one of the following:
selecting the higher one of the first threshold and the second threshold as the predetermined threshold;
selecting a numerical value within an interval bounded by the first threshold and the second threshold as the predetermined threshold.

6. The method of claim 5 :
wherein a result of the comparing step is that a minimum of the plurality of Euclidean distances is lower than the predetermined threshold;
wherein the determining step comprises determining that the HARQ-ACK information conveyed by one of a plurality of different bit values has been transmitted from the user equipment.

7. The method of claim 5 :
wherein a result of the comparing step is that a minimum of the plurality of Euclidean distances is equal to or higher than the predetermined threshold;
wherein the determining step comprises determining that the HARQ-ACK information has not been transmitted from the user equipment.

8. The method of claim 4 , wherein for the plurality of degrees of correlation, the method comprises one of the following:
selecting the lower one of the first threshold and the second threshold as the predetermined threshold;
selecting a numerical value within an interval bounded by the first threshold and the second threshold as the predetermined threshold.

9. The method of claim 8 :
wherein a result of the comparing is that a maximum of the plurality of degrees of correlation is higher than the predetermined threshold;
wherein the determining comprises determining that the HARQ-ACK information conveyed by one of a plurality of different bit values has been transmitted from the user equipment.

10. The method of claim 8 :
wherein a result of the comparing is that a maximum of the plurality of degrees of correlation is equal to or lower than the predetermined threshold;
wherein the determining comprises determining that the HARQ-ACK information has not been transmitted from the user equipment.

11. An arrangement in a base station for detecting hybrid automatic repeat request acknowledgement (HARQ-ACK) information, comprising:
memory;
one or more processing circuits operative connected to the memory and configured to function as:
an extractor circuit configured to extract a HARQ-ACK symbol sequence in data transmitted from a user equipment;
a generator circuit configured to generate a plurality of candidate HARQ-ACK symbol sequences;
a calculator circuit configured to calculate a degree of similarity between each of the plurality of candidate HARQ-ACK symbol sequences and the extracted HARQ-ACK symbol sequence to obtain a plurality of degrees of similarity;
a comparator configured to compare an extremum of the plurality of degrees of similarity with a predetermined threshold;
a determiner circuit configured to determine, based upon the comparison, whether the HARQ-ACK information has been transmitted from the user equipment.

12. The arrangement of claim 11 , wherein the generator circuit is configured to generate the plurality of candidate HARQ-ACK symbol sequences based upon a previous downlink scheduling assignment and a previous uplink scheduling grant.

13. The arrangement of claim 11 , wherein the calculator circuit is configured to calculate a Euclidean distance or a degree of correlation between each of the plurality of candidate HARQ-ACK symbol sequences and the extracted HARQ-ACK symbol sequence to form a plurality of Euclidean distances or a plurality of degrees of correlation.

14. The arrangement of claim 13 :
wherein the calculator circuit is configured to calculate a first threshold and a second threshold according to a cumulative distribution function with respect to the plurality of Euclidean distances or the plurality of degrees of correlation;
wherein the first threshold meets a missed detection probability condition of the HARQ-ACK information and the second threshold meets a false detection probability condition of the HARQ-ACK information.

15. The arrangement of claim 14 , wherein for the plurality of Euclidean distances, the arrangement comprises a selector circuit configured to perform one of the following:
select the higher one of the first threshold and the second threshold as the predetermined threshold;
select a numerical value within an interval bounded by the first threshold and the second threshold as the predetermined threshold.

16. The arrangement of claim 15 , wherein, in response to the comparator indicating that a minimum of the plurality of Euclidean distances is lower than the predetermined threshold, the determiner circuit is configured to determine that the HARQ-ACK information conveyed by one of a plurality of different bit values has been transmitted from the user equipment.

17. The arrangement of claim 15 , wherein, in response to the comparator indicating that a minimum of the plurality of Euclidean distances is equal to or higher than the predetermined threshold, the determiner circuit is configured to determine that the HARQ-ACK information has not been transmitted from the user equipment.

18. The arrangement of claim 14 , wherein for the plurality of degrees of correlation, the arrangement comprises a selector circuit configured to perform one of the following:
select the lower one of the first threshold and the second threshold as the predetermined threshold;
select a numerical value within an interval bounded by the first threshold and the second threshold as the predetermined threshold.

19. The arrangement of claim 18 , wherein, in response to the comparator indicating that a maximum of the plurality of degrees of correlation is higher than the predetermined threshold, the determiner circuit is configured to determine that the HARQ-ACK information conveyed by on

Assignees

• Wang Hai
• Li Peng
• Yu Shaowei
• Zhang Ruiqi
• Ericsson Telefon Ab L M

Inventors

• Wang Hai
• Li Peng
• Yu Shaowei
• Zhang Ruiqi

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L1/1887 Primary

  Scheduling and prioritising arrangements · CPC title

• H04W72/0413

  Electricity · mapped topic

• H04W88/08

  Access point devices · CPC title

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title