Beamforming Sector Sweep Optimization for Wireless Medium Efficiency
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Solution Overview
Problem
Existing communication systems face inefficiencies and delays due to redundant beamforming training transmissions and collisions when multiple devices attempt to perform beamforming training with a central point, leading to wasted wireless medium time and power.
Innovation Solution
The implementation of a method that allows multiple stations to utilize a single beamforming sector sweep by a piconet central point, where stations can determine quality metrics from transmissions intended for other devices, reducing the need for redundant training transmissions and collisions by skipping unnecessary beamforming sector sweeping data units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple stations perform individual beamforming training transmissions with a central point, then each station can establish reliable beamforming connections, but redundant transmissions and collisions occur leading to wasted wireless medium time and power
Solution Approach 1:
The patent combines multiple stations' beamforming training transmissions into a single centralized sector sweep operation. The central point performs one sector sweep that all stations can simultaneously utilize for their beamforming training, eliminating the need for each station to perform separate transmissions and thereby reducing wireless medium occupancy time while maintaining connection reliability.
Solution Approach 2:
The central point's sector sweep transmission serves multiple functions simultaneously: it performs the central point's own beamforming training with each station while also providing training signals that all other stations can use for their beamforming training. This multi-functional approach eliminates redundant transmissions and resolves the contradiction between reliability and time loss.
2Reliability
If multiple stations perform individual beamforming training transmissions with a central point, then each station can establish reliable beamforming connections, but redundant transmissions and collisions occur leading to wasted power
Solution Approach 1:
The patent merges multiple power-consuming transmission operations into a single centralized sector sweep. Instead of each station transmitting separately (consuming power individually), all stations benefit from one centralized transmission, dramatically reducing total power consumption while maintaining the reliability of beamforming connections through the shared training signal.
Solution Approach 2:
The central point's sector sweep transmission serves itself and all other stations simultaneously for beamforming training purposes. This self-service approach eliminates the need for other stations to expend power on separate training transmissions, as they can all derive the necessary training information from the central point's single transmission.
3Productivity
If multiple stations perform beamforming training simultaneously, then training can be completed faster, but collisions occur between training packets leading to delays
Solution Approach 1:
The patent implements a preliminary structured sequence where the central point performs sector sweeps in a predetermined order across different spatial sectors before stations attempt their training transmissions. This preliminary organization of the training environment prevents collisions by ensuring that when stations transmit, the central point has already established a structured framework that avoids packet conflicts, thereby maintaining both speed and reliability.
4Reliability
If traditional individual beamforming training is performed by each station, then complete training can be achieved, but overhead in beamforming training increases
Solution Approach 1:
The central point's sector sweep transmission universally serves all stations for their beamforming training needs. Instead of each station performing separate training sequences (increasing overhead), the single universal sector sweep provides all necessary training information for all stations, maintaining training completeness while dramatically reducing protocol overhead and simplifying the overall training process.
Data Source
Figure 1A~1C
Figure 2
Figure 3
AI summary
At a station, a plurality of beacon data units transmitted by a network controller is received during a timeslot reserved for transmission of beacons within a beacon interval of a wireless communication protocol. Each beacon data unit includes data indicating the beacon data unit is for transmit beamforming training for the network controller. Each beacon data unit is transmitted by the network controller using a different steering vector. At the station, respective qualities of the beacon data units received during the timeslot reserved for transmission of beacons are assessed. At the station, one of the steering vectors is selected based on the respective qualities of the beacon data units received during the timeslot reserved for transmission of beacons.The station transmits to the network controller an indication of the one steering vector. A transmit beamforming by sector sweeping between the network controller and the station is skipped during an association beamforming training, A-BFT, timeslot, within the beacon interval.