When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?
When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?
VHT TXOP power save improves battery life by allowing the WLAN transceiver to disable more components when in a low power state. This capability enables the device to consume less power compared to the legacy Power Save mode, thus extending battery life on a WLAN.
The VHT TXOP feature, which uses the partial AID in the PLCP header to determine if an incoming frame is for the listening STA, improves power management because the listening STA can sleep earlier in the frame transmission. Adding more streams increases power consumption. While 256-QAM may have a side benefit of reducing power consumption (due to shorter transmission times at higher data rates), it was not designed to improve power management. The standardized, full-time use of A-MPDU does not have a significant impact on power management either.
C is correct. C. The VHT TXOP feature, which uses the partial AID in the PLCP header to determine if an incoming frame is for the listening STA, improves power management because the listening STA can sleep earlier in the frame transmission.