Apparatus and method of performing channel sounding
AssigneeSamsung Electronics Co., Ltd.
InventorsEunsung Jeon, Chulho Chung, Myeongjin Kim
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Abstract
In a wireless local area network (WLAN) system including a first device and a second device, an operating method of the first device communicating with the second device via a channel includes collecting data related to a current state of the channel based on a signal received from the second device, predicting a probability of channel aging based on the data, and triggering a channel sounding process based on the prediction.
Claims9
An operating method of a first device in a wireless local area network (WLAN) system comprising:
- collecting data of a current state of a channel based on a signal received from a second device:
- predicting a probability of channel aging based on the data;
- and
- triggering a channel sounding process based on the prediction,
- wherein the collecting of the data comprises:
- receiving from the second device, an ACK signal corresponding to beamformed data transmitted from the first device to the second device;
- and
- generating first channel information corresponding to one or more sub-channels in the channel based on the ACK signal, and
- wherein the predicting of the probability of the channel aging comprises:
- extracting a distribution with a maximum value from among distributions of the first channel information;
- comparing the maximum value with a first threshold value to generate a first comparison;
- and
- determining that the channel aging is predicted to occur based on the first comparison.
An operating method of a first device in a wireless local area network (WLAN) system comprising:
- performing data communication including a channel sounding process based on a prediction scheme with a second device via a channel;
- receiving a notification signal indicating that a probability of channel aging occurrence is high;
- determining that the channel sounding process is possible based on the notification signal;
- and
- triggering the channel sounding process based on the determination, wherein the notification signal is received after an acknowledge (ACK) signal corresponding to beamformed data is transmitted from the first device to the second device.
An operating method of an access point (AP) in a wireless local area network (WLAN) system comprising:
- collecting data of a current state of one or more channels based on signals received from a plurality of STAs;
- predicting a probability of channel aging based on the data;
- and
- triggering a channel sounding process based on the prediction,
- wherein the collecting data of the current state comprises:
- measuring a signal-to-noise ratio (SNR) of the signals;
- and
- determining a threshold value based on the SNR, and
- wherein the predicting the probability of channel aging comprises:
- comparing a result of applying a first prediction scheme to the data with the threshold value;
- and
- determining that the channel aging is predicted to occur with high probability based on the comparison.
Dependencies are inferred from the claim text.