Reverse outer loop optimization for communication channels with discontinuous transmission (DTX)

Claim 2

In a communication device having discontinuous transmission (DTX) detection, a method of providing outer loop power control comprising: determining a compensation factor on the basis of a known non-zero probability of DTX detection given an erasure frame P(D/E) value; determining an expected target frame error rate (FER); and adjusting the expected target FER on the basis of the determined expected target FER and the compensation factor performing outer loop power control based on the expected target FER.

Claim 3

The method of claim 1 , wherein the outer loop power control is reverse outer loop power control.

Claim 4

The method of claim 1 , wherein the known non-zero P(D/E) is a constant value.

Claim 5

The method of claim 1 , wherein the known non-zero P(D/E) is dynamically determined.

Claim 6

The method of claim 1 , wherein the communication device is a CDMA base station, base station controller, or mobile station.

Claim 7

The method of claim 1 , wherein the adjusting occurs during non-DTX occurrences.

Claim 8

The method of claim 1 , further comprising: detecting consecutive DTX occurrences; and in response to the detection of consecutive DTX occurrences, lowering a power control setpoint associated with the outer loop power control.

Claim 9

In a wireless communication device having discontinuous transmission (DTX) detection, a method of providing outer loop power control comprising: detecting consecutive DTX occurrences; and in response to the detection of consecutive DTX occurrences, lowering a power control setpoint associated wit the outer loop power control.

Claim 10

In a wireless communication device having discontinuous transmission (DTX) detection, a method of providing outer loop power control comprising: detecting consecutive DTX occurrences; and in response to the detection of consecutive DTX occurrences, lowering a power control setpoint associated wit the outer loop power control.

Claim 11

The method of claim 8 , wherein the outer loop power control is reverse outer loop power control.

Claim 12

The method of claim 8 , wherein the wireless communication device is one of a CDMA base station, base station controller, or mobile station.

Claim 13

A wireless communication device having discontinuous transmission (DTX) detection and outer loop power control comprising: means for determining a compensation factor on the basis of a known non-zero probability of a DTX detection given an erasure frame P(D/E) value; means for determining an expected target frame error rate (FER); and means for adjusting the expected target FER on the basis of the determined expected target FER and the compensation factor.

Claim 14

A wireless communication device having discontinuous transmission (DTX) detection and outer loop power control comprising: means for determining a compensation factor on the basis of a known non-zero probability of a DTX detection given an erasure frame P(D/E) value; means for determining an expected target frame error rate (FER); and means for adjusting the expected target FER on the basis of the determined expected target FER and the compensation factor.

Claim 15

The device of claim 11 , wherein the outer loop power control is reverse outer loop power control.

Claim 16

The device of claim 11 , wherein the known non-zero P(D/E) is a constant value.

Claim 17

The device of claim 11 , wherein the known non-zero P(D/E) is dynamically determined.

Claim 18

The device of claim 11 , wherein the wireless communication device is one of a CDMA base station, base station controller, or mobile station.

Claim 19

The device of claim 11 , wherein the adjusting occurs during non-DTX occurrences.

Claim 20

The device of claim 11 , further comprising: means for detecting consecutive DTX occurrences; and means for lowering a power control setpoint associated with the outer loop power in response to the detection of consecutive DTX occurrences.

Claim 21

In a wireless communication device having discontinuous transmission (DTX) detection and outer loop power control comprising: means for detecting consecutive DTX occurrences; and means for lowering a power control setpoint associated with the outer loop power control on the basis of at least the detecting.

Claim 22

In a wireless communication device having discontinuous transmission (DTX) detection and outer loop power control comprising: means for detecting consecutive DTX occurrences; and means for lowering a power control setpoint associated with the outer loop power control on the basis of at least the detecting.

Claim 23

The device of claim 18 , wherein the outer loop power control is reverse outer loop power control.

Claim 24

The device of claim 18 , wherein the wireless communication device is one of a CDMA base station, base station controller, or mobile station.

Claim 25

In a communication device having discontinuous transmission (DTX) detection, a method of providing outer loop power control comprising: estimating a number of false erasure detections; and reducing the power control setpoint in proportion to the estimated number of false erasure detections.

Claim 26

In a communication device having discontinuous transmission (DTX) detection, a method of providing outer loop power control comprising: estimating a number of false erasure detections; and reducing the power control setpoint in proportion to the estimated number of false erasure detections.

Claim 27

The method of claim 21 , wherein the power control setpoint is reduced by a value equal to the estimated number of false erasure detections multiplied by a predetermined downward step size.

Claim 28

The method of claim 21 , wherein the estimating comprises determining the number of false erasure detections in a state machine comprising: in an initial state: adjusting the power control setpoint up by a predetermined upward step size following an erasure frame detection, and adjusting the power control setpoint down by a predetermined downward step size following a good frame detection; in a first state reached from the initial state following a predetermined number of consecutive DTX detections in the initial state: adjusting the power control setpoint as in the initial state, returning to the initial state following the good frame detection, and initializing an S 2 counter following the erasure frame detection; in a second state reached from the first state following the erasure frame detection in the first state: adjusting the power control setpoint as in the initial state, returning to the initial state and clears the S 2 counter following the good frame detection, initializing an S 3 counter upon a DTX detection, and incrementing the S 2 counter following the erasure frame detection; and in a third state reached from the second state following the DTX detection in the second state: adjusting the power control setpoint as in the initial state, incrementing the S 3 count for each DTX detection while in the third state, returning to the second state, incrementing the S 2 counter, and clearing the S 3 counter following the erasure frame detection, and returning to the initial state, resetting the S 2 counter, and resetting the S 3 counter following the good frame detection.

Claim 29

The method of claim 23 , wherein the estimate of the number of false erasures is equal to the value of the S 2 counter.

Claim 30

The method of claim 23 , wherein the estimate of the number of false erasures is equal to the value of the S 2 counter when the S 3 counter equals or exceeds a predetermined value.

Claim 31

The method of claim 23 , wherein the reducing the power control setpoint involves reducing the power control setpoint by a value equal to the value of the S 2 counter multiplied by the predetermined downward step size multiplied by a constant K.

Claim 32

The method of claim 26 , wherein K equals 1.

Claim 33

The method of claim 21 , the method further comprising: determining a compensation factor on the basis of a known non-zero P(D/E) value; determining an expected target frame error rate (FER); and adjusting the expected target FER in response to the determined expected target FER and the compensation factor.

Claim 34

The method of claim 28 , wherein the compensation factor is equal to (1−P(D/E)).