Methods permitting a wireless system receiver to determine and report channel conditions to a system transmitter

摘要

A method of providing feedback on channel observations to a transmitter includes observing a channel at a receiver based on received signals from the transmitter and determining whether a packet error rate (PER) is rising based on the observing. The receiver determines whether a rising PER is caused by channel noise or interference, and transmits a message to the transmitter indicating the cause of the rising PER. The cause may be encoded in reserved bits of a block acknowledgement (BA) frame or an Acknowledge (ACK) frame, or in a modulation coding scheme (MCS) used to transmit the message. The cause may be detected in response to SNR/RSSI level of received signals, or a number of receiver restarts. The transmitter may change the transmit rate adaptation algorithm to use a lower MCS if channel noise causes the rising PER, and a higher MCS if interference causes the rising PER.

主权项

1. A method of providing feedback on channel observations to a transmitter, the method comprising:
observing a channel at a receiver based on received signals from the transmitter; determining from the received signals whether a packet error rate (PER) is rising at the receiver; and if the PER is rising:
determining a cause of the rising PER is interference;sending a message using a first modulation coding scheme (MCS) to the transmitter designating the cause of the rising PER as interference, wherein the first MCS implements a higher data rate than a second MCS implemented by the transmitter.