Patent ID: 9693253
Date: 2017-06-27
CPC Classifications: H04L,H04W

Claim:
1. A method in a wireless access point (AP) for identifying channel quality between a first group of stations (STAs) and a second group of STAs associated with the AP, wherein each group of STAs comprises at least one STA configured for wireless communication, the method comprising: transmitting a first packet to the first group of STAs, wherein the first packet comprises information on a measurement time window within which the first group of STAs is to measure a received signal; transmitting one or more second packets to the second group of STAs, wherein each of the second packets includes respective scheduling information for each STA of the second group of STAs to send a reference packet during the measurement time window, wherein only one STA of the second group of STAs is allocated to transmit at each transmission interval within the measurement time window; receiving a measurement report from a first STA in the first group of STAs after the measurement time window, wherein the measurement report includes information on received signal quality at the first group of STAs of a signal transmitted by at least one STA from the second group of STAs; and identifying a second STA from the first group of STAs that did not correctly decode the reference packet according to the measurement report as a hidden STA from the second group of STAs.