Method and apparatus for measuring interference in wireless stations
AssigneeInterDigital Technology Corporation
InventorsJoseph A. Kwak, Joseph S. Levy, Juan Carlos Zuniga, Sudheer A. Grandhi
Life of this patent
Estimating the term…
Abstract
Metrics for estimating RF interference may be derived from measurements of idle channel noise, channel utilization, medium access delay, STA throughput, BSS throughput, and frame error rate. Further, metrics may be derived from the prior list of directly measured items in combination, as ratios and by rate of change analysis. RF interference is measured indirectly by measuring total idle channel power or by measuring changes in communication channel efficiency and frame errors.
Claims24
A method for measuring radio-frequency (RF) interference comprising:
- receiving an access point's (AP's) average noise power indicator (AP_ANPI) measurement;
- determining, at the station (STA), an ANPI (STA_ANPI);
- and
- determining RF interference by comparing the STA_ANPI to the AP_APNI.
A method for measuring radio-frequency (RF) interference comprising:
- receiving, from an access point (AP) a channel utilization metric (AP_CHAN_UTIL);
- determining, at the station (STA), a STA channel utilization (STA_CHAN_UTIL);
- and
- determining RF interference by comparing the STA_CHAN_UTIL to the AP_CHAN_UTIl.
A method for measuring radio-frequency (RF) interference comprising:
- receiving, from an access point (AP) medium access delay metric (AP_MAD);
- determining, at the station (STA), a medium access delay metric (STA_MAD);
- and
- determining RF interference by comparing the STA_MAD to the AP_MAD.
A method for measuring radio-frequency (RF) interference comprising:
- determining a received fragments errors (FCS_ERROR_COUNT) over a specific time period;
- determining a total number of received fragments (RECEIVED_FRAGMENT_COUNT) over the specific time period;
- determining the received fragment error rate (RECEIVED_FRAGMENT_ERROR_RATE) by taking the ratio of the FCS_ERROR_COUNT and the RECEIVED_FRAGMENT_COUNT) for a given time;
- and
- determining the change in the received fragment error rate over time (Δ_RECEIVED_FRAGMENT_ERROR_RATE);
- and
- estimating RF based on the change in the received fragment error rate over time.
A method for measuring radio-frequency (RF) interference comprising:
- Measuring the fragment error rate rate of change of the stations average noise power indicator (STA_ANPI);
- determining, the station (STA) an ANPI (STA_ANPI) at two different times;
- and
- determining RF interference by comparing these STA_ANPI values to each other.
A method for measuring radio-frequency (RF) interference comprising:
- measuring a throughput;
- determining a channel utilization at the AP (AP_CHAN_UTIL);
- determining, a BSS throughput (BSS_THROUGHPUT);
- determining a ratio of the AP_CHAN_UTIL to the BSS_THROUGHPUT (AP_CHAN_UTIL/BSS_THROUGHPUT);
- determining a rate of change of AP_CHAN_UTIL/BSS_THROUGHPUT (Δ_AP_CHAN_UTIL/BSS_THROUGHPUT);
- and
- determining an RF interference based on the Δ_AP_CHAN_UTIL/BSS_THROUGHPUT.
Dependencies are inferred from the claim text.