Statistical projection for controlling BLER

Patent metadata

Field	Value
Publication number	US-10917856-B2
Application number	US-201916564929-A
Country	US
Kind code	B2
Filing date	Sep 9, 2019
Priority date	Sep 7, 2018
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

Methods are disclosed for determining a block error rate (BLER) and determining if the BLER is significantly above, below or on BLER target. The method includes determining a pair of thresholds including an upper threshold and a lower threshold for a predetermined confidence level and determining a threshold in total number of blocks received. The method further includes determining a Required Compensation BLER from a number of bad blocks, a total number of blocks received and a maximum total number of blocks to receive for a purpose of statistical significance; comparing the Required Compensation BLER against the upper and lower threshold to determine if the BLER is significantly above the BLER target, below the BLER target or inconclusive; and, if the threshold in total number of blocks received is reached, then the inconclusive result is reinterpreted as the BLER being on target.

First claim

The invention claimed is:

1. A method of determining a block error rate (BLER) and determining if the BLER is above, below or on BLER target comprising;
determining a pair of thresholds including an upper threshold and a lower threshold for a predetermined confidence level;
determining a threshold in total number of blocks received; determining a Required Compensation BLER from a number of bad blocks, a total number of blocks received and a maximum total number of blocks to receive for a purpose of statistical significance;
comparing the Required Compensation BLER against the upper and lower threshold to determine if the BLER is above the BLER target, below the BLER target or inconclusive;
wherein, if the threshold in total number of blocks received is reached, then the inconclusive result is reinterpreted as the BLER being on target.

2. The method of claim 1 wherein the pair of thresholds are valid for any number of received blocks, a specific BLER target, and a specific confidence value.

3. The method of claim 1 wherein the BLER is determined from a number of bad blocks divided by a total number of blocks received.

4. The method of claim 1 wherein the Required Compensation BLER is calculated by determining a first value by subtracting a total number of blocks received so far from the maximum number of blocks to be received and dividing a total number of bad blocks allowed by the first value.

5. The method of claim 1 wherein the threshold for the total number of blocks received is calculated by determining a first value by subtracting the lower threshold from the BLER target, determining a second value by multiplying the BLER target by a BLER target range factor and subtracting the lower threshold from the result, and dividing the first value by the second value.

6. The method of claim 1 wherein when the BLER is significantly above the BLER target then increasing a Signal to Interference Ratio (SIR) target.

7. The method of claim 1 wherein when the BLER is significantly below the BLER target then decreasing a Signal to Interference Ratio (SIR) target.

8. The method of claim 1 further comprising resetting block statistics.

9. A method of determining a block error rate (BLER) and determining if BLER is above, below or on BLER target comprising:
determining a set of pairs of thresholds including an upper threshold and a lower threshold for a predetermined confidence level per pair;
determining a maximum total number of blocks received;
determining a BLER from a number of bad blocks and a total number of blocks received; comparing the BLER against a particular upper and lower threshold from the set of pairs of thresholds to determine if the BLER is above the BLER target, below the BLER target or inconclusive;
wherein, if the maximum total number of blocks received is reached, then the inconclusive result is reinterpreted as the BLER being on target.

10. The method of claim 9 wherein the pair of thresholds are valid for any number of received blocks, a specific BLER target and a specific confidence value.

11. The method of claim 9 wherein the BLER is determined from a number of bad blocks divided by a total number of blocks received.

12. The method of claim 9 wherein the threshold for the total number of blocks received is calculated by determining a first value by subtracting the lower threshold from the BLER target, determining a second value by multiplying the BLER target by a BLER target range factor and subtracting the lower threshold from the result, and dividing the first value by the second value.

13. The method of claim 9 wherein when the BLER is significantly above the BLER target then increasing a Signal to Interference Ratio (SIR) target.

14. The method of claim 9 wherein when the BLER is significantly below the BLER target then decreasing a Signal to Interference Ratio (SIR) target.

15. The method of claim 9 further comprising resetting block statistics.

Assignees

• Parallel Wireless Inc

Inventors

• Mrozinski Eric
• Wiorowski Romain

Classifications

• H04W52/20 Primary

  using error rate · CPC title

• H04L1/203 Primary

  Details of error rate determination, e.g. BER, FER or WER · CPC title

• H04W52/241

  taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo · CPC title

• H04B17/336

  Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] · CPC title

• H04W52/12

  Outer and inner loops · CPC title