Asymmetric Beam Steering Protocol for 60 GHz Wireless Networks
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Solution Overview
Problem
The implementation of 60 GHz millimeter wave wireless networks is hindered by severe path losses due to high free space propagation, penetration, reflection, and scattering losses, as well as atmospheric oxygen absorption, leading to unstable connections and poor communication performance.
Innovation Solution
The implementation of beam training processes that allow antenna systems to select directional communication beams by broadcasting beam selection training sequences, determining signal quality, and adjusting antenna systems to maximize signal-to-noise ratio through beam steering, thereby overcoming path losses and improving communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam training processes are implemented to select directional communication beams, then signal quality and communication stability are improved, but device complexity and protocol overhead increase
Solution Approach 1:
The beam training process is divided into two distinct phases: asymmetric beam training where the AP transmits training sequences to multiple STAs simultaneously, and symmetric beam training where STAs transmit training sequences to the AP. This segmentation allows different beam selection strategies to be applied at different stages, improving overall system reliability while managing complexity through structured progression
Solution Approach 2:
The AP performs preliminary beam training by transmitting training sequences to multiple STAs before the STAs need to respond. This preliminary action establishes downlink beam directions in advance, allowing subsequent uplink communication to benefit from pre-configured beam relationships, thereby improving communication stability without requiring complex real-time beam selection
2Loss of energy
If beam steering is used to focus transmission energy on the best direction, then path losses are reduced and communication range is extended, but the system requires more sophisticated antenna control mechanisms
Solution Approach 1:
STAs determine the quality of received beam training sequences autonomously and select the best beam direction based on measured signal quality metrics. This self-service approach allows each STA to independently perform beam selection without requiring complex centralized control, reducing path losses through effective beam steering while keeping control mechanisms manageable
Solution Approach 2:
The system implements feedback mechanisms where STAs measure the quality of received training sequences and use this information to select optimal beam directions. The feedback loop enables continuous optimization of beam steering to minimize path losses, with quality metrics guiding the selection process without requiring overly sophisticated control algorithms
3Reliability
If multiple beam selection training sequences are transmitted to multiple apparatuses, then directional communication quality is improved, but transmission overhead and time consumption increase
Solution Approach 1:
The AP combines multiple beam training operations by transmitting training sequences to multiple STAs in a coordinated manner during the asymmetric beam training phase. This merging approach allows simultaneous beam selection for multiple devices, improving directional communication quality across the network while reducing the total time required compared to sequential training of each STA individually
4Reliability
If beam training is activated periodically or on-demand, then communication performance is maintained, but protocol overhead and processing burden increase
Solution Approach 1:
The system implements periodic beam training activation where the AP transmits beam training sequences at scheduled intervals. This periodic action maintains communication performance by regularly updating beam directions to adapt to changing channel conditions, while the structured periodic schedule allows devices to manage their processing energy efficiently by knowing when to expect and process training sequences
Data Source
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AI summary
A system for configuring antenna systems for selecting directional communication signals corresponding to other apparatuses. A directional communication signal may be selected as the result of a beam training operation coordinated between at least two apparatuses. Beam selection training sequences may then be broadcast from one apparatus, and the receiving apparatus may determine the quality of each received beam training sequence in order to approximate a vector describing the direction from which the signals were sent.