Simultaneous feedback signaling for dynamic bandwidth selection

摘要

A method of simultaneously providing channel quality feedback information in all valid sub-channels is provided to facilitate and improve the performance of dynamic transmission bandwidth adjustment and fast link adaptation. A receiving device receives a sounding signal over a wide channel in a wireless system. The sounding signal is transmitted from a transmitting device over multiple sub-channels of the wide channel. The receiving device estimates channel quality information based on the sounding signal for each sub-channel. The channel quality information includes estimated average SNR and recommended MCS and other channel quality metrics. The receiving device transmits a feedback message to the transmitting device. The feedback message contains the estimated channel quality information for all valid sub-channels within the transmission bandwidth. The transmitting device performs dynamic transmission bandwidth selection and fast link adaptation based on the channel quality information for all valid sub-channels.

主权项

1. A method comprising:
(a) receiving a sounding signal transmitted from a transmitting device over a wide channel by a receiving device in a wireless system, wherein the sounding signal is transmitted over multiple sub-channels of the wide channel; (b) estimating channel quality information based on the received sounding signal for each sub-channel; and (c) transmitting a feedback message to the transmitting device, wherein the feedback message contains the estimated channel quality information for all valid transmission bandwidths within a transmission bandwidth of the wide channel, and the feedback message is provided to the transmitting device for performing dynamic transmission bandwidth selection and/or MCS adaptation; wherein the feedback message contains a HT control field, which contains multiple MFB subfields, and each MFB subfield corresponds to one of the valid sub-channels.