BRP Packet Beamforming Training for Multi-Channel WLAN
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current WLAN standards, particularly IEEE 802.11ay, face challenges in performing beamforming training across multiple channels, which limits efficient signal transmission and reception due to the lack of defined methods for channel bonding and MIMO technology in high-frequency bands.
Innovation Solution
A method involving the transmission and reception of a BRP packet using the lowest MCS to perform beamforming training across multiple channels, enabling reliable signal transmission and reception through channel bonding or channel aggregation by configuring the BRP packet with specific fields like L-STF, L-CE, L-Header, EDMG Header A, and TRN, and applying these configurations in the 60 GHz band for channel bonding or aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming training is performed across multiple channels in IEEE 802.11ay system, then signal transmission reliability and data transfer rates are improved, but the complexity of the transmission method increases due to lack of defined methods for channel bonding and MIMO technology
Solution Approach 1:
The patent segments the beamforming training process into distinct phases: initial training phase using legacy channels and methods, and subsequent training phases using bonded channels with MIMO. This segmentation allows the system to build upon existing reliable methods while gradually introducing complexity for improved performance.
Solution Approach 2:
The patent applies preliminary beamforming training on individual channels before channel bonding is activated. This preliminary action establishes baseline beamforming parameters that can be later refined when multiple channels are bonded, reducing the overall complexity by breaking down the training process into manageable steps.
2Productivity
If channel bonding and MIMO technology are applied in 60 GHz band, then data transfer rates are maximized, but the difficulty of performing beamforming training across multiple channels increases
Solution Approach 1:
The patent introduces intermediary training signals and reference signals that facilitate beamforming training across bonded channels. These intermediary elements act as mediators between the multiple channels, enabling the system to perform training without directly managing the full complexity of all channel combinations simultaneously.
Solution Approach 2:
The patent extends beamforming training from the spatial dimension (single channel) to the frequency dimension (multiple bonded channels). By adding this another dimension, the system can achieve higher data transfer rates through MIMO while using structured training approaches that manage the increased complexity.
3Reliability
If a lowest MCS is applied to BRP packet for beamforming training, then training reliability is improved, but the transmission efficiency during training phase is reduced
Solution Approach 1:
The patent applies lowest MCS only partially - specifically during the initial beamforming training phase where reliability is critical. Once beamforming parameters are established, the system transitions to higher MCS values for actual data transmission, thus achieving reliable training without permanently sacrificing transmission efficiency.
Solution Approach 2:
The patent implements periodic beamforming training using lowest MCS at intervals, rather than continuously. This periodic application ensures training reliability is maintained when needed while allowing high-efficiency data transmission during non-training periods, thus balancing reliability and efficiency.
Data Source
AI summary
The present specification proposes a method for a station to transmit and receive a signal in a wireless LAN (WLAN) system and an apparatus therefor. More specifically, when the station transmits and receives a signal via a plurality of channels, the present invention proposes a method of performing beamforming training on the plurality of channels, a method of transmitting and receiving a signal based on the beamforming training and an apparatus therefor.