Solicited Beamforming Sounding for Lower Wireless Overhead
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication networks face inefficiencies in coordinating communication services to a larger number of devices while minimizing transmission and processing overhead due to traditional sounding protocols that consume significant airtime and resources.
Innovation Solution
A solicited sounding framework where the beamformer initiates the sounding process, transmitting a single sounding trigger to multiple receivers, which respond with dedicated training signals requiring minimal processing, allowing the beamformer to estimate forward channel state information efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional explicit sounding protocols are used where the beamformer transmits sounding packets to each station, then channel state information can be obtained for beamforming, but transmission overhead and airtime consumption increase significantly
Solution Approach 1:
Instead of the beamformer transmitting sounding packets to stations (traditional explicit sounding), the patent inverts the approach by having stations transmit sounding packets to the beamformer. The beamformer then uses reciprocity to derive forward channel state information from the reverse channel measurements, significantly reducing transmission overhead while maintaining measurement accuracy.
2Measurement precision
If traditional explicit sounding is conducted with multiple stations, then each station can obtain channel information, but the processing overhead at each station increases
Solution Approach 1:
The beamformer performs the complex processing operations itself rather than requiring each station to process and generate detailed sounding responses. Stations simply transmit the sounding packets and the beamformer derives the channel state information, eliminating the need for stations to perform complex matrix operations and feedback generation.
3Reliability
If the beamformer sends individual sounding triggers to multiple stations, then each station can be sounded separately, but coordination efficiency decreases
Solution Approach 1:
The patent combines multiple sounding operations into a single coordinated process. The beamformer transmits a single multi-user sounding trigger that initiates simultaneous sounding packet transmissions from multiple stations, merging what would otherwise be separate sequential operations into one efficient coordinated event.
Data Source
AI summary
Example implementations are directed to methods and systems employing a solicited sounding protocol that includes an efficient communication sequence for operating a wireless transceiver transmitting a sounding trigger to one or more beamformees via a forward channel, receiving at least one dedicated training signal from the one or more beamformees via a reverse channel in response to the sounding trigger, and for each of the received dedicated training signal. The method also includes estimating forward CSI derived based on the dedicated training signal from an associated beamformee; and where subsequent packets are precoded with precoding derived from the forward CSI for transmission to the associated beamformee via the forward channel. Example aspects including scheduling multiple dedicated training signals from one or more beamformees based on a single sounding trigger.