Beam forming method and device

By using the combination of NDPA and NDP frames and BRP trigger frames in the next generation 802.11 standard, the feedback process of channel state information is optimized, the problem of excessive feedback overhead is solved, and efficient feedback of channel state information and beamforming resources are realized. optimization.

CN119316023APending Publication Date: 2025-01-14MEDIATEK INC
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Patent Information

Application Number
CN202410905242.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-06-14
Filing Date
2024-07-08
Publication Date
2025-01-14

AI Technical Summary

Technical Problem

In the next generation 802.11 standard, beamforming objects need to feedback more channel state information, resulting in excessive feedback overhead. How to balance the feedback overhead and the feedback accuracy of channel state information is an urgent problem.

Method used

Optimize direction finding overhead by sending empty packet announcement (NDPA) frames and empty packets (NDP) to instruct the target user to perform channel estimation, and use beamforming report polling (BRP) trigger frames to trigger the target user feedback channel status information, optimizing direction finding overhead , reduce unnecessary user participation and resource allocation.

Benefits of technology

It effectively optimizes direction finding overhead, reduces the consumption of communication resources, and improves the efficiency of channel state information feedback, and is suitable for quality maintenance of beamforming in multi-user MIMO environment.

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Abstract

The invention provides a beam forming method and device. The beam forming method comprises the following steps: sending an NDPA (null data packet announcement) frame, and sending the NDPA frame to a pseudo user and a target user by a beam former to indicate the target user to prepare for channel estimation; sending a null data packet (NDP), sending the null data packet to the target user by the beam former, and performing channel estimation by the target user based on the NDP to determine channel state information; sending a beam forming report polling (BRP) trigger frame, and sending the BRP trigger frame to the target user by a beam former to trigger the target user to feed back channel state information; and sending, by the target user, a beamforming report to the beamformer, wherein the beamforming report includes the channel state information.
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