# US 8,543,075 B2 · Received signal to noise indicator

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- Number: US 8,543,075 B2
- Document ID: US8543075B2
- Status: Granted
- Kind: B2
- Application number: 13/371,582
- Filed: 2012-02-13
- Published: 2012-06-07
- Granted: 2013-09-24
- Earliest claimed: 2003-01-14
- Assignees: Intel Corporation
- Applicants: Joseph A. Kwak
- Inventors: Joseph A. Kwak
- Web page: https://patentgrep.com/patent/US8543075B2

## CPC

- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04L 1/0045: {Arrangements at the receiver end}
- H04L 1/20: using signal quality detector
- H04L 1/203: {Details of error rate determination, e.g. BER, FER or WER}
- H04L 1/206: {for modulated signals}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A method and device may be used to produce a received interference value in wireless communications. The device may include one or more components to measure a received power of a channel and measure an average noise plus interference power of the channel. The device may include a processor configured to calculate a received signal to noise indicator (RSNI) value. The RSNI may be based on the measured received power and the measured average noise plus interference power.

## Claims

### Claim 1

A method for use in a receiver for reporting a received signal to noise ratio, the method comprising:
measuring a received power of a channel;
measuring an average noise plus interference power of the channel;
calculating a received signal to noise indicator (RSNI) value based on the measured received power and the measured average noise plus interference power, wherein calculating the RNSI value further comprises:
subtracting the measured average noise plus interference power from the measured received power to determine a difference,
dividing the difference by the measured average noise plus interference to determine the RNSI value; and
reporting the RSNI value to an Institute of Electrical and Electronics Engineers (IEEE) 802.11 access point.

### Claim 2 (depends on 1)

The method of claim 1 wherein the RSNI value is included in a field of a beacon report.

### Claim 3 (depends on 1)

The method of claim 1 wherein the RSNI value is included in a field of a frame report.

### Claim 4 (depends on 1)

The method of claim 1 wherein the RSNI value is included in a field of a reassociation response.

### Claim 5 (depends on 1)

The method of claim 1 wherein the received power and the average noise plus interference power are measured at an antenna connector.

### Claim 6 (depends on 1)

The method of claim 1 further comprising: scaling the RSNI value for a desired range.

### Claim 7 (depends on 1)

The method of claim 1 wherein the measured received power is a measurement of a radio frequency (RF) signal that includes noise and interference.

### Claim 8 (depends on 1)

The method of claim 1 wherein the RSNI value is in a range of −10 db to +118 db.

### Claim 9 (depends on 1)

The method of claim 1 further comprising: transmitting the RSNI value in a management frame or a control frame.

### Claim 10

A receiver comprising:
a first device configured to measure a received power of a channel;
a second device configured to measure an average noise plus interference power of the channel;
a processor configured to calculate a received signal to noise indicator (RSNI) value based on the measured received power and the measured average noise plus interference power, wherein the processor calculates the RNSI value by subtracting the measured average noise plus interference power from the measured received power to determine a difference, and dividing the difference by the measured average noise plus interference; and
a third device configured to report the RSNI value to an Institute of Electrical and Electronics Engineer is (IEEE) 802.11 device.

### Claim 11 (depends on 10)

The receiver of claim 10 wherein the processor is further configured to include the RSNI value in a field of a beacon report.

### Claim 12 (depends on 10)

The receiver of claim 10 wherein the processor is further configured to include the RSNI value in a field of a frame report.

### Claim 13 (depends on 10)

The receiver of claim 10 wherein the processor is further configured to include the RSNI value in a field of a reassociation response.

### Claim 14 (depends on 10)

The receiver of claim 10 wherein the received power and the average noise plus interference power are measured at an antenna connector.

### Claim 15 (depends on 10)

The receiver of claim 10 wherein the processor is further configured to scale the RSNI value for a desired range.

### Claim 16 (depends on 10)

The receiver of claim 10 wherein the measured received power is a measurement of a radio frequency (RF) signal that includes noise and interference.

### Claim 17 (depends on 10)

The receiver of claim 10 wherein the receiver is a wireless transmit/receive unit (WTRU).

### Claim 18 (depends on 10)

The receiver of claim 10 wherein the receiver is a base station.